./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --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/weaver/popl20-more-multiply-verify.wvr.c -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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:37:57,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:37:57,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:37:57,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:37:57,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:37:57,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:37:57,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:37:57,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:37:57,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:37:57,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:37:57,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:37:57,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:37:57,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:37:57,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:37:57,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:37:57,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:37:57,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:37:57,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:37:57,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:37:57,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:37:57,930 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:37:57,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:37:57,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:37:57,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:37:57,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:37:57,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:37:57,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:37:57,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:37:57,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:37:57,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:37:57,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:37:57,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:37:57,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:37:57,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:37:57,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:37:57,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:37:57,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:37:57,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:37:57,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:37:57,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:37:57,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:37:57,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:37:57,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:37:57,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:37:57,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:37:57,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:37:57,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:37:57,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:37:57,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:37:57,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:37:57,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:37:57,991 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:37:57,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:37:57,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:37:57,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:37:57,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:37:57,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:37:57,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:37:57,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:37:57,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:37:57,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:37:57,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:37:57,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:37:57,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:37:57,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:37:57,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:37:57,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:37:57,997 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:37:57,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:37:57,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:37:57,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-07-19 21:37:58,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:37:58,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:37:58,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:37:58,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:37:58,211 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:37:58,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-19 21:37:58,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8356c6c/3e6086e9b79a4533992a446a28afdbdf/FLAG86db92230 [2022-07-19 21:37:58,554 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:37:58,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-19 21:37:58,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8356c6c/3e6086e9b79a4533992a446a28afdbdf/FLAG86db92230 [2022-07-19 21:37:58,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8356c6c/3e6086e9b79a4533992a446a28afdbdf [2022-07-19 21:37:58,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:37:58,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:37:58,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:37:58,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:37:58,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:37:58,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:37:58" (1/1) ... [2022-07-19 21:37:58,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0bfab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:58, skipping insertion in model container [2022-07-19 21:37:58,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:37:58" (1/1) ... [2022-07-19 21:37:58,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:37:59,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:37:59,142 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/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-19 21:37:59,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:37:59,159 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:37:59,174 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/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-19 21:37:59,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:37:59,184 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:37:59,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59 WrapperNode [2022-07-19 21:37:59,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:37:59,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:37:59,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:37:59,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:37:59,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,211 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-07-19 21:37:59,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:37:59,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:37:59,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:37:59,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:37:59,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:37:59,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:37:59,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:37:59,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:37:59,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (1/1) ... [2022-07-19 21:37:59,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:37:59,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:37:59,257 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 21:37:59,267 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 21:37:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:37:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:37:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:37:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:37:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:37:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:37:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:37:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:37:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:37:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:37:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:37:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:37:59,297 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 21:37:59,395 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:37:59,396 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:37:59,627 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:37:59,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:37:59,710 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:37:59,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:37:59 BoogieIcfgContainer [2022-07-19 21:37:59,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:37:59,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:37:59,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:37:59,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:37:59,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:37:58" (1/3) ... [2022-07-19 21:37:59,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9eb8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:37:59, skipping insertion in model container [2022-07-19 21:37:59,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:59" (2/3) ... [2022-07-19 21:37:59,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9eb8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:37:59, skipping insertion in model container [2022-07-19 21:37:59,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:37:59" (3/3) ... [2022-07-19 21:37:59,720 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-07-19 21:37:59,724 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:37:59,730 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:37:59,731 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:37:59,731 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:37:59,790 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:37:59,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-07-19 21:37:59,899 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-19 21:37:59,899 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:37:59,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-07-19 21:37:59,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-07-19 21:37:59,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-07-19 21:37:59,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:37:59,926 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@6dbb6207, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24f88748 [2022-07-19 21:37:59,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:37:59,953 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2022-07-19 21:37:59,957 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:37:59,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:37:59,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:37:59,958 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 21:37:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:37:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1039110471, now seen corresponding path program 1 times [2022-07-19 21:37:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:37:59,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411621029] [2022-07-19 21:37:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:37:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:00,152 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 21:38:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411621029] [2022-07-19 21:38:00,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411621029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:38:00,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:38:00,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:38:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274127671] [2022-07-19 21:38:00,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:38:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:38:00,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:38:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:38:00,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-07-19 21:38:00,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 21:38:00,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:00,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-07-19 21:38:00,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:00,282 INFO L129 PetriNetUnfolder]: 18/215 cut-off events. [2022-07-19 21:38:00,283 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:38:00,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-07-19 21:38:00,286 INFO L132 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-07-19 21:38:00,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-07-19 21:38:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:38:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:38:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-19 21:38:00,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-07-19 21:38:00,297 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-19 21:38:00,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-19 21:38:00,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:00,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-19 21:38:00,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 21:38:00,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:00,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:00,307 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-07-19 21:38:00,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-07-19 21:38:00,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:38:00,313 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-07-19 21:38:00,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-07-19 21:38:00,317 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-07-19 21:38:00,318 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-07-19 21:38:00,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 21:38:00,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:00,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:00,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:38:00,319 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 21:38:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 401544920, now seen corresponding path program 1 times [2022-07-19 21:38:00,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:00,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353912103] [2022-07-19 21:38:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:00,468 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 21:38:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353912103] [2022-07-19 21:38:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353912103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:38:00,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:38:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:38:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559139037] [2022-07-19 21:38:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:38:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:38:00,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:38:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:38:00,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-07-19 21:38:00,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 21:38:00,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:00,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-07-19 21:38:00,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:00,571 INFO L129 PetriNetUnfolder]: 20/259 cut-off events. [2022-07-19 21:38:00,571 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:38:00,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 616 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-07-19 21:38:00,574 INFO L132 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-07-19 21:38:00,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-07-19 21:38:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:38:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:38:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-07-19 21:38:00,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-07-19 21:38:00,579 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-07-19 21:38:00,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-07-19 21:38:00,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:00,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-07-19 21:38:00,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 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 21:38:00,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 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 21:38:00,586 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 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 21:38:00,586 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-07-19 21:38:00,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-07-19 21:38:00,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:38:00,592 INFO L242 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-07-19 21:38:00,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-07-19 21:38:00,593 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-19 21:38:00,593 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-07-19 21:38:00,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 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 21:38:00,594 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:00,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:38:00,595 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 21:38:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2022-07-19 21:38:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:00,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130512452] [2022-07-19 21:38:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:00,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130512452] [2022-07-19 21:38:00,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130512452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238310754] [2022-07-19 21:38:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:00,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:00,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:00,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:38:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:38:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:38:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:01,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238310754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:38:01,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:38:01,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-07-19 21:38:01,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658908285] [2022-07-19 21:38:01,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:38:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:38:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:01,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:38:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:38:01,307 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-07-19 21:38:01,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 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 21:38:01,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:01,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-07-19 21:38:01,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:01,522 INFO L129 PetriNetUnfolder]: 24/300 cut-off events. [2022-07-19 21:38:01,522 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-19 21:38:01,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 858 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-07-19 21:38:01,524 INFO L132 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2022-07-19 21:38:01,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2022-07-19 21:38:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:38:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:38:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2022-07-19 21:38:01,528 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2022-07-19 21:38:01,528 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2022-07-19 21:38:01,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2022-07-19 21:38:01,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:01,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2022-07-19 21:38:01,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 0 states have call successors, (0), 0 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 21:38:01,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:38:01,535 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:38:01,535 INFO L186 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2022-07-19 21:38:01,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2022-07-19 21:38:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:38:01,538 INFO L242 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2022-07-19 21:38:01,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2022-07-19 21:38:01,539 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2022-07-19 21:38:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2022-07-19 21:38:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 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 21:38:01,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:01,540 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:01,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:01,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:01,756 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 21:38:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -807681704, now seen corresponding path program 2 times [2022-07-19 21:38:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:01,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4250107] [2022-07-19 21:38:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:03,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4250107] [2022-07-19 21:38:03,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4250107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866147102] [2022-07-19 21:38:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:38:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:04,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:04,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:38:04,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:38:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 21:38:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:04,529 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:38:04,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:38:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:38:04,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:38:04,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866147102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:38:04,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:38:04,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-19 21:38:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589763699] [2022-07-19 21:38:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:38:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:38:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:38:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 21:38:04,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-19 21:38:04,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 21:38:04,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:04,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-19 21:38:04,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:05,121 INFO L129 PetriNetUnfolder]: 424/1101 cut-off events. [2022-07-19 21:38:05,121 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-19 21:38:05,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 1101 events. 424/1101 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6095 event pairs, 139 based on Foata normal form. 35/1083 useless extension candidates. Maximal degree in co-relation 2332. Up to 500 conditions per place. [2022-07-19 21:38:05,128 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-07-19 21:38:05,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 804 flow [2022-07-19 21:38:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:38:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:38:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-07-19 21:38:05,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-07-19 21:38:05,131 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-07-19 21:38:05,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-07-19 21:38:05,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:05,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-07-19 21:38:05,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 21:38:05,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:38:05,137 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:38:05,137 INFO L186 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1400 transitions. [2022-07-19 21:38:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 804 flow [2022-07-19 21:38:05,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-07-19 21:38:05,142 INFO L242 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-07-19 21:38:05,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-07-19 21:38:05,143 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-07-19 21:38:05,143 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-07-19 21:38:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 21:38:05,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:05,144 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:05,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:05,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 21:38:05,362 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 21:38:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1998262026, now seen corresponding path program 3 times [2022-07-19 21:38:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34374941] [2022-07-19 21:38:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:05,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:06,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34374941] [2022-07-19 21:38:06,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34374941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:06,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001717856] [2022-07-19 21:38:06,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:38:06,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:06,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:06,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:06,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:38:07,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-19 21:38:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:38:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:07,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-19 21:38:07,862 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:38:07,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:38:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:38:07,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:38:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001717856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:38:07,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:38:07,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-07-19 21:38:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682586158] [2022-07-19 21:38:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:38:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:38:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:38:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 21:38:07,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-19 21:38:07,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:38:07,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:07,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-19 21:38:07,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:09,117 INFO L129 PetriNetUnfolder]: 570/1363 cut-off events. [2022-07-19 21:38:09,118 INFO L130 PetriNetUnfolder]: For 1556/1654 co-relation queries the response was YES. [2022-07-19 21:38:09,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1363 events. 570/1363 cut-off events. For 1556/1654 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7708 event pairs, 149 based on Foata normal form. 30/1328 useless extension candidates. Maximal degree in co-relation 3527. Up to 656 conditions per place. [2022-07-19 21:38:09,132 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 83 selfloop transitions, 28 changer transitions 37/225 dead transitions. [2022-07-19 21:38:09,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 1051 flow [2022-07-19 21:38:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:38:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:38:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-19 21:38:09,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-19 21:38:09,136 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-19 21:38:09,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-19 21:38:09,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:09,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-19 21:38:09,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 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 21:38:09,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:38:09,146 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:38:09,147 INFO L186 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 21 states and 1877 transitions. [2022-07-19 21:38:09,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 1051 flow [2022-07-19 21:38:09,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 1003 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-07-19 21:38:09,154 INFO L242 Difference]: Finished difference. Result has 187 places, 166 transitions, 634 flow [2022-07-19 21:38:09,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=634, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2022-07-19 21:38:09,157 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 46 predicate places. [2022-07-19 21:38:09,157 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 634 flow [2022-07-19 21:38:09,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:38:09,158 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:09,158 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:09,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:09,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:09,378 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 21:38:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash -776477366, now seen corresponding path program 4 times [2022-07-19 21:38:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:09,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161684411] [2022-07-19 21:38:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161684411] [2022-07-19 21:38:11,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161684411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:11,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231914284] [2022-07-19 21:38:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:38:11,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:11,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:38:12,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:38:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 21:38:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:13,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-19 21:38:13,384 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:38:13,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:38:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:38:14,330 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-19 21:38:14,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-07-19 21:38:14,362 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-19 21:38:14,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 60 [2022-07-19 21:38:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:15,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231914284] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:38:15,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:38:15,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28, 28] total 87 [2022-07-19 21:38:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962860449] [2022-07-19 21:38:15,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:38:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-19 21:38:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-19 21:38:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=7120, Unknown=3, NotChecked=0, Total=7482 [2022-07-19 21:38:15,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-19 21:38:15,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 634 flow. Second operand has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 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 21:38:15,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:15,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-19 21:38:15,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:36,066 INFO L129 PetriNetUnfolder]: 2127/5197 cut-off events. [2022-07-19 21:38:36,068 INFO L130 PetriNetUnfolder]: For 9739/9893 co-relation queries the response was YES. [2022-07-19 21:38:36,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 5197 events. 2127/5197 cut-off events. For 9739/9893 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 42931 event pairs, 408 based on Foata normal form. 71/5079 useless extension candidates. Maximal degree in co-relation 14710. Up to 676 conditions per place. [2022-07-19 21:38:36,123 INFO L132 encePairwiseOnDemand]: 108/154 looper letters, 339 selfloop transitions, 123 changer transitions 80/599 dead transitions. [2022-07-19 21:38:36,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 599 transitions, 3640 flow [2022-07-19 21:38:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-19 21:38:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-19 21:38:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5298 transitions. [2022-07-19 21:38:36,133 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4587012987012987 [2022-07-19 21:38:36,133 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5298 transitions. [2022-07-19 21:38:36,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5298 transitions. [2022-07-19 21:38:36,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:36,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5298 transitions. [2022-07-19 21:38:36,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.64) internal successors, (5298), 75 states have internal predecessors, (5298), 0 states have call successors, (0), 0 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 21:38:36,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 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 21:38:36,242 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 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 21:38:36,242 INFO L186 Difference]: Start difference. First operand has 187 places, 166 transitions, 634 flow. Second operand 75 states and 5298 transitions. [2022-07-19 21:38:36,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 599 transitions, 3640 flow [2022-07-19 21:38:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 599 transitions, 3372 flow, removed 123 selfloop flow, removed 15 redundant places. [2022-07-19 21:38:36,268 INFO L242 Difference]: Finished difference. Result has 280 places, 254 transitions, 1647 flow [2022-07-19 21:38:36,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1647, PETRI_PLACES=280, PETRI_TRANSITIONS=254} [2022-07-19 21:38:36,270 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 139 predicate places. [2022-07-19 21:38:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 254 transitions, 1647 flow [2022-07-19 21:38:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 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 21:38:36,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:36,273 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:36,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:36,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:36,490 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 21:38:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -708962460, now seen corresponding path program 5 times [2022-07-19 21:38:36,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:36,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387603359] [2022-07-19 21:38:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:36,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387603359] [2022-07-19 21:38:38,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387603359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210734856] [2022-07-19 21:38:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:38:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:38,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:38:38,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:38:38,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 21:38:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:38,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:38:38,661 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:38:38,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:38:39,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-07-19 21:38:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:39,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:38:39,995 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:38:39,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2022-07-19 21:38:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:40,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:38:40,907 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-19 21:38:40,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 202 [2022-07-19 21:38:40,921 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:38:40,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2022-07-19 21:38:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210734856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:38:43,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:38:43,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 85 [2022-07-19 21:38:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599729339] [2022-07-19 21:38:43,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:38:43,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-19 21:38:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-19 21:38:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=6737, Unknown=1, NotChecked=0, Total=7140 [2022-07-19 21:38:43,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-19 21:38:43,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 254 transitions, 1647 flow. Second operand has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 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 21:38:43,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:43,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-19 21:38:43,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:51,819 INFO L129 PetriNetUnfolder]: 2301/5537 cut-off events. [2022-07-19 21:38:51,820 INFO L130 PetriNetUnfolder]: For 29019/29222 co-relation queries the response was YES. [2022-07-19 21:38:51,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20882 conditions, 5537 events. 2301/5537 cut-off events. For 29019/29222 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46305 event pairs, 616 based on Foata normal form. 48/5352 useless extension candidates. Maximal degree in co-relation 20822. Up to 1257 conditions per place. [2022-07-19 21:38:51,872 INFO L132 encePairwiseOnDemand]: 110/154 looper letters, 224 selfloop transitions, 129 changer transitions 18/428 dead transitions. [2022-07-19 21:38:51,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 3597 flow [2022-07-19 21:38:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:38:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:38:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3595 transitions. [2022-07-19 21:38:51,876 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4489260739260739 [2022-07-19 21:38:51,876 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3595 transitions. [2022-07-19 21:38:51,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3595 transitions. [2022-07-19 21:38:51,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:51,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3595 transitions. [2022-07-19 21:38:51,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 69.13461538461539) internal successors, (3595), 52 states have internal predecessors, (3595), 0 states have call successors, (0), 0 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 21:38:51,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 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 21:38:51,888 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 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 21:38:51,888 INFO L186 Difference]: Start difference. First operand has 280 places, 254 transitions, 1647 flow. Second operand 52 states and 3595 transitions. [2022-07-19 21:38:51,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 3597 flow [2022-07-19 21:38:52,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 428 transitions, 3142 flow, removed 188 selfloop flow, removed 34 redundant places. [2022-07-19 21:38:52,038 INFO L242 Difference]: Finished difference. Result has 297 places, 289 transitions, 2055 flow [2022-07-19 21:38:52,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2055, PETRI_PLACES=297, PETRI_TRANSITIONS=289} [2022-07-19 21:38:52,039 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 156 predicate places. [2022-07-19 21:38:52,039 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 289 transitions, 2055 flow [2022-07-19 21:38:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 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 21:38:52,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:52,041 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:52,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 21:38:52,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:52,258 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 21:38:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1006525896, now seen corresponding path program 6 times [2022-07-19 21:38:52,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:52,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545936228] [2022-07-19 21:38:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:52,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:54,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545936228] [2022-07-19 21:38:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545936228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:54,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132637351] [2022-07-19 21:38:54,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:38:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:54,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:54,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:38:54,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-19 21:38:54,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:54,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:38:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:54,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-19 21:38:55,000 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:38:55,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:38:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:38:55,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:38:55,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132637351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:38:55,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:38:55,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-19 21:38:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268468359] [2022-07-19 21:38:55,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:38:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:38:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:38:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 21:38:55,102 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-19 21:38:55,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 289 transitions, 2055 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:38:55,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:55,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-19 21:38:55,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:56,626 INFO L129 PetriNetUnfolder]: 2206/5417 cut-off events. [2022-07-19 21:38:56,626 INFO L130 PetriNetUnfolder]: For 33097/33297 co-relation queries the response was YES. [2022-07-19 21:38:56,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 5417 events. 2206/5417 cut-off events. For 33097/33297 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 46047 event pairs, 758 based on Foata normal form. 78/5240 useless extension candidates. Maximal degree in co-relation 20411. Up to 3035 conditions per place. [2022-07-19 21:38:56,672 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 156 selfloop transitions, 61 changer transitions 49/353 dead transitions. [2022-07-19 21:38:56,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 353 transitions, 2934 flow [2022-07-19 21:38:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:38:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:38:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-07-19 21:38:56,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-07-19 21:38:56,696 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-07-19 21:38:56,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-07-19 21:38:56,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:56,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-07-19 21:38:56,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 0 states have call successors, (0), 0 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 21:38:56,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:38:56,706 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:38:56,706 INFO L186 Difference]: Start difference. First operand has 297 places, 289 transitions, 2055 flow. Second operand 21 states and 1880 transitions. [2022-07-19 21:38:56,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 353 transitions, 2934 flow [2022-07-19 21:38:56,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 353 transitions, 2758 flow, removed 32 selfloop flow, removed 37 redundant places. [2022-07-19 21:38:56,804 INFO L242 Difference]: Finished difference. Result has 284 places, 280 transitions, 2020 flow [2022-07-19 21:38:56,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2020, PETRI_PLACES=284, PETRI_TRANSITIONS=280} [2022-07-19 21:38:56,806 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 143 predicate places. [2022-07-19 21:38:56,806 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 280 transitions, 2020 flow [2022-07-19 21:38:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:38:56,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:56,807 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:56,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:57,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:57,015 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 21:38:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -945882872, now seen corresponding path program 7 times [2022-07-19 21:38:57,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:57,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924821220] [2022-07-19 21:38:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:57,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:58,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:58,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924821220] [2022-07-19 21:38:58,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924821220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:58,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267716576] [2022-07-19 21:38:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:38:58,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:58,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:58,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:38:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-19 21:38:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:59,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-19 21:38:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:59,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-19 21:39:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:39:00,116 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:39:00,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-19 21:39:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:39:00,983 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-19 21:39:00,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 608 treesize of output 566 [2022-07-19 21:39:01,011 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-19 21:39:01,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 400 [2022-07-19 21:39:01,047 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-19 21:39:01,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 334 [2022-07-19 21:39:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:03,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267716576] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:39:03,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:39:03,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 84 [2022-07-19 21:39:03,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331577755] [2022-07-19 21:39:03,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:39:03,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-19 21:39:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-19 21:39:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=6525, Unknown=3, NotChecked=0, Total=6972 [2022-07-19 21:39:03,319 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-19 21:39:03,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 280 transitions, 2020 flow. Second operand has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 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 21:39:03,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:03,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-19 21:39:03,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:39:15,588 INFO L129 PetriNetUnfolder]: 2737/6656 cut-off events. [2022-07-19 21:39:15,589 INFO L130 PetriNetUnfolder]: For 52664/53025 co-relation queries the response was YES. [2022-07-19 21:39:15,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27892 conditions, 6656 events. 2737/6656 cut-off events. For 52664/53025 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 58719 event pairs, 408 based on Foata normal form. 132/6518 useless extension candidates. Maximal degree in co-relation 27826. Up to 908 conditions per place. [2022-07-19 21:39:15,672 INFO L132 encePairwiseOnDemand]: 114/154 looper letters, 351 selfloop transitions, 155 changer transitions 81/647 dead transitions. [2022-07-19 21:39:15,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 647 transitions, 5867 flow [2022-07-19 21:39:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 21:39:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 21:39:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5011 transitions. [2022-07-19 21:39:15,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4785141329258976 [2022-07-19 21:39:15,677 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5011 transitions. [2022-07-19 21:39:15,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5011 transitions. [2022-07-19 21:39:15,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:39:15,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5011 transitions. [2022-07-19 21:39:15,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.69117647058823) internal successors, (5011), 68 states have internal predecessors, (5011), 0 states have call successors, (0), 0 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 21:39:15,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 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 21:39:15,691 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 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 21:39:15,691 INFO L186 Difference]: Start difference. First operand has 284 places, 280 transitions, 2020 flow. Second operand 68 states and 5011 transitions. [2022-07-19 21:39:15,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 647 transitions, 5867 flow [2022-07-19 21:39:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 647 transitions, 5321 flow, removed 216 selfloop flow, removed 25 redundant places. [2022-07-19 21:39:15,822 INFO L242 Difference]: Finished difference. Result has 340 places, 324 transitions, 2986 flow [2022-07-19 21:39:15,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=2986, PETRI_PLACES=340, PETRI_TRANSITIONS=324} [2022-07-19 21:39:15,822 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 199 predicate places. [2022-07-19 21:39:15,823 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 324 transitions, 2986 flow [2022-07-19 21:39:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 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 21:39:15,824 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:39:15,824 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:15,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:39:16,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:16,044 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 21:39:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:39:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash -598237080, now seen corresponding path program 8 times [2022-07-19 21:39:16,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:39:16,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34789325] [2022-07-19 21:39:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:16,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:39:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:39:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34789325] [2022-07-19 21:39:18,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34789325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:39:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355003314] [2022-07-19 21:39:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:39:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:39:18,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:39:18,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:39:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:39:18,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:39:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 21:39:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:39:19,008 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:39:19,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:39:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:39:19,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:39:19,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355003314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:39:19,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:39:19,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [39] total 48 [2022-07-19 21:39:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248120497] [2022-07-19 21:39:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:39:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:39:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:39:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 21:39:19,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 154 [2022-07-19 21:39:19,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 324 transitions, 2986 flow. Second operand has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 21:39:19,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:19,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 154 [2022-07-19 21:39:19,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:39:20,691 INFO L129 PetriNetUnfolder]: 2844/6935 cut-off events. [2022-07-19 21:39:20,691 INFO L130 PetriNetUnfolder]: For 60538/61093 co-relation queries the response was YES. [2022-07-19 21:39:20,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31169 conditions, 6935 events. 2844/6935 cut-off events. For 60538/61093 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 61935 event pairs, 793 based on Foata normal form. 169/6733 useless extension candidates. Maximal degree in co-relation 31090. Up to 4074 conditions per place. [2022-07-19 21:39:20,873 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 204 selfloop transitions, 66 changer transitions 44/413 dead transitions. [2022-07-19 21:39:20,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 413 transitions, 4338 flow [2022-07-19 21:39:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:39:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:39:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1441 transitions. [2022-07-19 21:39:20,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2022-07-19 21:39:20,875 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1441 transitions. [2022-07-19 21:39:20,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1441 transitions. [2022-07-19 21:39:20,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:39:20,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1441 transitions. [2022-07-19 21:39:20,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.92857142857143) internal successors, (1441), 14 states have internal predecessors, (1441), 0 states have call successors, (0), 0 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 21:39:20,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 21:39:20,879 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 21:39:20,879 INFO L186 Difference]: Start difference. First operand has 340 places, 324 transitions, 2986 flow. Second operand 14 states and 1441 transitions. [2022-07-19 21:39:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 413 transitions, 4338 flow [2022-07-19 21:39:21,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 413 transitions, 3971 flow, removed 124 selfloop flow, removed 47 redundant places. [2022-07-19 21:39:21,064 INFO L242 Difference]: Finished difference. Result has 301 places, 345 transitions, 3171 flow [2022-07-19 21:39:21,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3171, PETRI_PLACES=301, PETRI_TRANSITIONS=345} [2022-07-19 21:39:21,065 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 160 predicate places. [2022-07-19 21:39:21,065 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 345 transitions, 3171 flow [2022-07-19 21:39:21,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 21:39:21,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:39:21,066 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:21,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:39:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:39:21,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === 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 21:39:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:39:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -419105616, now seen corresponding path program 9 times [2022-07-19 21:39:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:39:21,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536353162] [2022-07-19 21:39:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:39:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:22,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:39:22,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536353162] [2022-07-19 21:39:22,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536353162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:39:22,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453170081] [2022-07-19 21:39:22,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:39:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:39:22,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:39:22,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:39:23,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-19 21:39:23,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:39:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 21:39:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:39:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:39:23,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-19 21:39:23,548 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:39:23,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:39:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:39:23,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:39:23,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453170081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:39:23,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:39:23,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-19 21:39:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90914151] [2022-07-19 21:39:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:39:23,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:39:23,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:39:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 21:39:23,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-19 21:39:23,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 345 transitions, 3171 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:39:23,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:23,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-19 21:39:23,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:39:25,605 INFO L129 PetriNetUnfolder]: 2853/6944 cut-off events. [2022-07-19 21:39:25,605 INFO L130 PetriNetUnfolder]: For 57746/58258 co-relation queries the response was YES. [2022-07-19 21:39:25,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30435 conditions, 6944 events. 2853/6944 cut-off events. For 57746/58258 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 62040 event pairs, 794 based on Foata normal form. 183/6760 useless extension candidates. Maximal degree in co-relation 30362. Up to 4047 conditions per place. [2022-07-19 21:39:25,665 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 214 selfloop transitions, 70 changer transitions 49/420 dead transitions. [2022-07-19 21:39:25,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 420 transitions, 4368 flow [2022-07-19 21:39:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:39:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:39:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-19 21:39:25,667 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-19 21:39:25,667 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-19 21:39:25,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-19 21:39:25,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:39:25,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-19 21:39:25,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 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 21:39:25,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:39:25,672 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:39:25,672 INFO L186 Difference]: Start difference. First operand has 301 places, 345 transitions, 3171 flow. Second operand 21 states and 1877 transitions. [2022-07-19 21:39:25,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 420 transitions, 4368 flow [2022-07-19 21:39:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 420 transitions, 4242 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-07-19 21:39:25,819 INFO L242 Difference]: Finished difference. Result has 314 places, 346 transitions, 3236 flow [2022-07-19 21:39:25,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3236, PETRI_PLACES=314, PETRI_TRANSITIONS=346} [2022-07-19 21:39:25,819 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 173 predicate places. [2022-07-19 21:39:25,820 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 346 transitions, 3236 flow [2022-07-19 21:39:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:39:25,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:39:25,820 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:25,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 21:39:26,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:26,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === 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 21:39:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:39:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1795464152, now seen corresponding path program 10 times [2022-07-19 21:39:26,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:39:26,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640105284] [2022-07-19 21:39:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:26,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:39:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:28,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:39:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640105284] [2022-07-19 21:39:28,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640105284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:39:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706002315] [2022-07-19 21:39:28,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:39:28,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:39:28,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:39:28,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:39:28,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:39:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:39:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 21:39:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:39:28,684 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:39:28,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:39:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:28,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:39:29,142 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-19 21:39:29,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-07-19 21:39:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706002315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:39:30,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:39:30,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 69 [2022-07-19 21:39:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390157783] [2022-07-19 21:39:30,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:39:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 21:39:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 21:39:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 21:39:30,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-19 21:39:30,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 346 transitions, 3236 flow. Second operand has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 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 21:39:30,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:30,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-19 21:39:30,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:39:40,922 INFO L129 PetriNetUnfolder]: 3627/8514 cut-off events. [2022-07-19 21:39:40,923 INFO L130 PetriNetUnfolder]: For 77462/77869 co-relation queries the response was YES. [2022-07-19 21:39:40,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38059 conditions, 8514 events. 3627/8514 cut-off events. For 77462/77869 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 76798 event pairs, 675 based on Foata normal form. 170/8349 useless extension candidates. Maximal degree in co-relation 37984. Up to 2376 conditions per place. [2022-07-19 21:39:41,001 INFO L132 encePairwiseOnDemand]: 112/154 looper letters, 303 selfloop transitions, 196 changer transitions 84/643 dead transitions. [2022-07-19 21:39:41,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 643 transitions, 6559 flow [2022-07-19 21:39:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 21:39:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-19 21:39:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4625 transitions. [2022-07-19 21:39:41,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.476705833848691 [2022-07-19 21:39:41,033 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4625 transitions. [2022-07-19 21:39:41,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4625 transitions. [2022-07-19 21:39:41,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:39:41,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4625 transitions. [2022-07-19 21:39:41,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.41269841269842) internal successors, (4625), 63 states have internal predecessors, (4625), 0 states have call successors, (0), 0 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 21:39:41,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 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 21:39:41,061 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 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 21:39:41,061 INFO L186 Difference]: Start difference. First operand has 314 places, 346 transitions, 3236 flow. Second operand 63 states and 4625 transitions. [2022-07-19 21:39:41,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 643 transitions, 6559 flow [2022-07-19 21:39:41,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 643 transitions, 6229 flow, removed 98 selfloop flow, removed 20 redundant places. [2022-07-19 21:39:41,330 INFO L242 Difference]: Finished difference. Result has 371 places, 393 transitions, 4369 flow [2022-07-19 21:39:41,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4369, PETRI_PLACES=371, PETRI_TRANSITIONS=393} [2022-07-19 21:39:41,331 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 230 predicate places. [2022-07-19 21:39:41,332 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 393 transitions, 4369 flow [2022-07-19 21:39:41,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 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 21:39:41,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:39:41,333 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:41,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:39:41,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:39:41,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === 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 21:39:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:39:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1415463268, now seen corresponding path program 11 times [2022-07-19 21:39:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:39:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664586479] [2022-07-19 21:39:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:39:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:43,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:39:43,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664586479] [2022-07-19 21:39:43,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664586479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:39:43,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922709028] [2022-07-19 21:39:43,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:39:43,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:43,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:39:43,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:39:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:39:43,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:39:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:39:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:39:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:39:44,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:39:44,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-19 21:39:44,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:39:44,645 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:39:44,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-19 21:39:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:44,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:39:45,300 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-19 21:39:45,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 105 [2022-07-19 21:39:45,309 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:39:45,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2022-07-19 21:39:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:47,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922709028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:39:47,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:39:47,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 28] total 84 [2022-07-19 21:39:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930518303] [2022-07-19 21:39:47,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:39:47,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-19 21:39:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-19 21:39:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6576, Unknown=1, NotChecked=0, Total=6972 [2022-07-19 21:39:47,056 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-19 21:39:47,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 393 transitions, 4369 flow. Second operand has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 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 21:39:47,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:47,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-19 21:39:47,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:02,170 INFO L129 PetriNetUnfolder]: 3727/8973 cut-off events. [2022-07-19 21:40:02,170 INFO L130 PetriNetUnfolder]: For 111271/111777 co-relation queries the response was YES. [2022-07-19 21:40:02,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44343 conditions, 8973 events. 3727/8973 cut-off events. For 111271/111777 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 82994 event pairs, 855 based on Foata normal form. 189/8800 useless extension candidates. Maximal degree in co-relation 44253. Up to 2998 conditions per place. [2022-07-19 21:40:02,312 INFO L132 encePairwiseOnDemand]: 115/154 looper letters, 324 selfloop transitions, 163 changer transitions 115/659 dead transitions. [2022-07-19 21:40:02,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 659 transitions, 7543 flow [2022-07-19 21:40:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 21:40:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 21:40:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4751 transitions. [2022-07-19 21:40:02,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45368601986249046 [2022-07-19 21:40:02,335 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4751 transitions. [2022-07-19 21:40:02,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4751 transitions. [2022-07-19 21:40:02,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:02,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4751 transitions. [2022-07-19 21:40:02,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 69.86764705882354) internal successors, (4751), 68 states have internal predecessors, (4751), 0 states have call successors, (0), 0 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 21:40:02,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 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 21:40:02,351 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 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 21:40:02,352 INFO L186 Difference]: Start difference. First operand has 371 places, 393 transitions, 4369 flow. Second operand 68 states and 4751 transitions. [2022-07-19 21:40:02,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 659 transitions, 7543 flow [2022-07-19 21:40:02,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 659 transitions, 7002 flow, removed 190 selfloop flow, removed 48 redundant places. [2022-07-19 21:40:02,723 INFO L242 Difference]: Finished difference. Result has 396 places, 396 transitions, 4524 flow [2022-07-19 21:40:02,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4524, PETRI_PLACES=396, PETRI_TRANSITIONS=396} [2022-07-19 21:40:02,725 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 255 predicate places. [2022-07-19 21:40:02,725 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 396 transitions, 4524 flow [2022-07-19 21:40:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 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 21:40:02,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:02,739 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:02,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:02,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:40:02,957 INFO L420 AbstractCegarLoop]: === Iteration 14 === 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 21:40:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2123235670, now seen corresponding path program 12 times [2022-07-19 21:40:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:02,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089626808] [2022-07-19 21:40:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:04,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089626808] [2022-07-19 21:40:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089626808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434293490] [2022-07-19 21:40:04,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:40:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:04,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:04,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:40:05,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-19 21:40:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 21:40:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:05,586 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:40:05,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:40:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:40:05,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:40:05,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434293490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:05,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:40:05,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-19 21:40:05,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606812878] [2022-07-19 21:40:05,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:40:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:40:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 21:40:05,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-19 21:40:05,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 396 transitions, 4524 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 21:40:05,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:05,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-19 21:40:05,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:07,900 INFO L129 PetriNetUnfolder]: 3693/8865 cut-off events. [2022-07-19 21:40:07,900 INFO L130 PetriNetUnfolder]: For 119178/119755 co-relation queries the response was YES. [2022-07-19 21:40:07,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45741 conditions, 8865 events. 3693/8865 cut-off events. For 119178/119755 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 82338 event pairs, 1126 based on Foata normal form. 154/8544 useless extension candidates. Maximal degree in co-relation 45646. Up to 5540 conditions per place. [2022-07-19 21:40:07,998 INFO L132 encePairwiseOnDemand]: 139/154 looper letters, 268 selfloop transitions, 62 changer transitions 46/479 dead transitions. [2022-07-19 21:40:07,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 479 transitions, 6071 flow [2022-07-19 21:40:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:40:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:40:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1393 transitions. [2022-07-19 21:40:08,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-07-19 21:40:08,008 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1393 transitions. [2022-07-19 21:40:08,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1393 transitions. [2022-07-19 21:40:08,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:08,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1393 transitions. [2022-07-19 21:40:08,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.15384615384616) internal successors, (1393), 13 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 21:40:08,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:40:08,012 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 21:40:08,012 INFO L186 Difference]: Start difference. First operand has 396 places, 396 transitions, 4524 flow. Second operand 13 states and 1393 transitions. [2022-07-19 21:40:08,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 479 transitions, 6071 flow [2022-07-19 21:40:08,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 479 transitions, 5752 flow, removed 71 selfloop flow, removed 58 redundant places. [2022-07-19 21:40:08,407 INFO L242 Difference]: Finished difference. Result has 337 places, 410 transitions, 4716 flow [2022-07-19 21:40:08,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4716, PETRI_PLACES=337, PETRI_TRANSITIONS=410} [2022-07-19 21:40:08,407 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 196 predicate places. [2022-07-19 21:40:08,408 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 410 transitions, 4716 flow [2022-07-19 21:40:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 21:40:08,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:08,408 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:08,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:40:08,626 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 21:40:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1239829432, now seen corresponding path program 13 times [2022-07-19 21:40:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422464899] [2022-07-19 21:40:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:10,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422464899] [2022-07-19 21:40:10,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422464899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479391304] [2022-07-19 21:40:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:40:10,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:10,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:10,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:40:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 21:40:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:40:11,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-19 21:40:11,631 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-19 21:40:11,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2022-07-19 21:40:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:11,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:12,450 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-19 21:40:12,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 129 [2022-07-19 21:40:12,482 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-07-19 21:40:12,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 64 [2022-07-19 21:40:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:14,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479391304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:14,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:14,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-07-19 21:40:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476459009] [2022-07-19 21:40:14,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:14,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-19 21:40:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:14,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-19 21:40:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=6274, Unknown=1, NotChecked=0, Total=6642 [2022-07-19 21:40:14,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-19 21:40:14,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 410 transitions, 4716 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 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 21:40:14,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:14,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-19 21:40:14,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:23,472 INFO L129 PetriNetUnfolder]: 3834/9424 cut-off events. [2022-07-19 21:40:23,472 INFO L130 PetriNetUnfolder]: For 119423/119978 co-relation queries the response was YES. [2022-07-19 21:40:23,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46116 conditions, 9424 events. 3834/9424 cut-off events. For 119423/119978 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 89004 event pairs, 643 based on Foata normal form. 139/9151 useless extension candidates. Maximal degree in co-relation 46032. Up to 3205 conditions per place. [2022-07-19 21:40:23,606 INFO L132 encePairwiseOnDemand]: 113/154 looper letters, 325 selfloop transitions, 192 changer transitions 44/618 dead transitions. [2022-07-19 21:40:23,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 618 transitions, 8052 flow [2022-07-19 21:40:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 21:40:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-19 21:40:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3553 transitions. [2022-07-19 21:40:23,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-07-19 21:40:23,610 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3553 transitions. [2022-07-19 21:40:23,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3553 transitions. [2022-07-19 21:40:23,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:23,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3553 transitions. [2022-07-19 21:40:23,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 69.66666666666667) internal successors, (3553), 51 states have internal predecessors, (3553), 0 states have call successors, (0), 0 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 21:40:23,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 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 21:40:23,620 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 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 21:40:23,620 INFO L186 Difference]: Start difference. First operand has 337 places, 410 transitions, 4716 flow. Second operand 51 states and 3553 transitions. [2022-07-19 21:40:23,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 618 transitions, 8052 flow [2022-07-19 21:40:24,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 618 transitions, 7890 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-07-19 21:40:24,059 INFO L242 Difference]: Finished difference. Result has 389 places, 477 transitions, 6349 flow [2022-07-19 21:40:24,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6349, PETRI_PLACES=389, PETRI_TRANSITIONS=477} [2022-07-19 21:40:24,060 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2022-07-19 21:40:24,060 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 477 transitions, 6349 flow [2022-07-19 21:40:24,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 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 21:40:24,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:24,061 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:24,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:24,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:40:24,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 21:40:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1869641422, now seen corresponding path program 14 times [2022-07-19 21:40:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957429140] [2022-07-19 21:40:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:26,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957429140] [2022-07-19 21:40:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957429140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192303238] [2022-07-19 21:40:26,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:26,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:26,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:40:26,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:40:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 21:40:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:40:26,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-19 21:40:27,022 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:40:27,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:40:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:40:27,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:40:27,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192303238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:40:27,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-19 21:40:27,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641460055] [2022-07-19 21:40:27,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:40:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:40:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 21:40:27,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-19 21:40:27,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 477 transitions, 6349 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:40:27,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-19 21:40:27,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:29,778 INFO L129 PetriNetUnfolder]: 3803/9323 cut-off events. [2022-07-19 21:40:29,778 INFO L130 PetriNetUnfolder]: For 139489/140098 co-relation queries the response was YES. [2022-07-19 21:40:29,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 9323 events. 3803/9323 cut-off events. For 139489/140098 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 88704 event pairs, 1227 based on Foata normal form. 145/9012 useless extension candidates. Maximal degree in co-relation 49051. Up to 5800 conditions per place. [2022-07-19 21:40:29,886 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 336 selfloop transitions, 78 changer transitions 42/543 dead transitions. [2022-07-19 21:40:29,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 543 transitions, 7851 flow [2022-07-19 21:40:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:40:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:40:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-19 21:40:29,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-19 21:40:29,888 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-19 21:40:29,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-19 21:40:29,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:29,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-19 21:40:29,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 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 21:40:29,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:40:29,892 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:40:29,892 INFO L186 Difference]: Start difference. First operand has 389 places, 477 transitions, 6349 flow. Second operand 21 states and 1875 transitions. [2022-07-19 21:40:29,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 543 transitions, 7851 flow [2022-07-19 21:40:30,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 543 transitions, 7615 flow, removed 79 selfloop flow, removed 33 redundant places. [2022-07-19 21:40:30,388 INFO L242 Difference]: Finished difference. Result has 377 places, 478 transitions, 6364 flow [2022-07-19 21:40:30,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6364, PETRI_PLACES=377, PETRI_TRANSITIONS=478} [2022-07-19 21:40:30,389 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 236 predicate places. [2022-07-19 21:40:30,389 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 478 transitions, 6364 flow [2022-07-19 21:40:30,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:40:30,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:30,390 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:30,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 21:40:30,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:30,608 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 21:40:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:30,608 INFO L85 PathProgramCache]: Analyzing trace with hash 543394134, now seen corresponding path program 15 times [2022-07-19 21:40:30,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:30,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896721220] [2022-07-19 21:40:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:30,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896721220] [2022-07-19 21:40:32,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896721220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:32,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368041202] [2022-07-19 21:40:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:40:32,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:32,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:32,258 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:32,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:40:32,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-19 21:40:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 21:40:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:40:33,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-19 21:40:33,218 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:40:33,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-07-19 21:40:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:40:33,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:40:33,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368041202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:33,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:40:33,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-19 21:40:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96360631] [2022-07-19 21:40:33,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:33,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:40:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:40:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2312, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 21:40:33,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-19 21:40:33,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 478 transitions, 6364 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:40:33,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:33,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-19 21:40:33,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:36,087 INFO L129 PetriNetUnfolder]: 3820/9413 cut-off events. [2022-07-19 21:40:36,087 INFO L130 PetriNetUnfolder]: For 137239/137875 co-relation queries the response was YES. [2022-07-19 21:40:36,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 9413 events. 3820/9413 cut-off events. For 137239/137875 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90116 event pairs, 1218 based on Foata normal form. 175/9109 useless extension candidates. Maximal degree in co-relation 49181. Up to 5798 conditions per place. [2022-07-19 21:40:36,200 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 336 selfloop transitions, 74 changer transitions 51/548 dead transitions. [2022-07-19 21:40:36,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 7869 flow [2022-07-19 21:40:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:40:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:40:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-19 21:40:36,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-19 21:40:36,202 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-19 21:40:36,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-19 21:40:36,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:36,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-19 21:40:36,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 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 21:40:36,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:40:36,206 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 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 21:40:36,206 INFO L186 Difference]: Start difference. First operand has 377 places, 478 transitions, 6364 flow. Second operand 21 states and 1875 transitions. [2022-07-19 21:40:36,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 7869 flow [2022-07-19 21:40:36,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 548 transitions, 7693 flow, removed 19 selfloop flow, removed 20 redundant places. [2022-07-19 21:40:36,673 INFO L242 Difference]: Finished difference. Result has 378 places, 474 transitions, 6282 flow [2022-07-19 21:40:36,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6282, PETRI_PLACES=378, PETRI_TRANSITIONS=474} [2022-07-19 21:40:36,674 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 237 predicate places. [2022-07-19 21:40:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 474 transitions, 6282 flow [2022-07-19 21:40:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 21:40:36,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:36,674 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:36,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 21:40:36,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:40:36,891 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 21:40:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash -920380298, now seen corresponding path program 16 times [2022-07-19 21:40:36,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:36,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762972738] [2022-07-19 21:40:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762972738] [2022-07-19 21:40:38,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762972738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003034435] [2022-07-19 21:40:38,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:40:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:38,925 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:40:38,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:40:39,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:40:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-19 21:40:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:40:40,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-19 21:40:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:40:40,377 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:40:40,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-19 21:40:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:40,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:41,186 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-19 21:40:41,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 204 [2022-07-19 21:40:41,194 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 21:40:41,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 15 [2022-07-19 21:40:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:43,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003034435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:43,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:43,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 82 [2022-07-19 21:40:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200069306] [2022-07-19 21:40:43,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-19 21:40:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-19 21:40:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=6299, Unknown=1, NotChecked=0, Total=6642 [2022-07-19 21:40:43,625 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-19 21:40:43,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 474 transitions, 6282 flow. Second operand has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 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 21:40:43,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:43,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-19 21:40:43,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:00,379 INFO L129 PetriNetUnfolder]: 4080/10051 cut-off events. [2022-07-19 21:41:00,379 INFO L130 PetriNetUnfolder]: For 140761/141233 co-relation queries the response was YES. [2022-07-19 21:41:00,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51591 conditions, 10051 events. 4080/10051 cut-off events. For 140761/141233 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 97122 event pairs, 943 based on Foata normal form. 109/9739 useless extension candidates. Maximal degree in co-relation 51494. Up to 2668 conditions per place. [2022-07-19 21:41:00,485 INFO L132 encePairwiseOnDemand]: 116/154 looper letters, 429 selfloop transitions, 161 changer transitions 141/791 dead transitions. [2022-07-19 21:41:00,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 791 transitions, 10662 flow [2022-07-19 21:41:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-19 21:41:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-19 21:41:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5078 transitions. [2022-07-19 21:41:00,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4710575139146568 [2022-07-19 21:41:00,488 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5078 transitions. [2022-07-19 21:41:00,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5078 transitions. [2022-07-19 21:41:00,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:00,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5078 transitions. [2022-07-19 21:41:00,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 72.54285714285714) internal successors, (5078), 70 states have internal predecessors, (5078), 0 states have call successors, (0), 0 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 21:41:00,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 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 21:41:00,499 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 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 21:41:00,500 INFO L186 Difference]: Start difference. First operand has 378 places, 474 transitions, 6282 flow. Second operand 70 states and 5078 transitions. [2022-07-19 21:41:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 791 transitions, 10662 flow [2022-07-19 21:41:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 791 transitions, 10325 flow, removed 79 selfloop flow, removed 20 redundant places. [2022-07-19 21:41:00,972 INFO L242 Difference]: Finished difference. Result has 449 places, 517 transitions, 7410 flow [2022-07-19 21:41:00,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7410, PETRI_PLACES=449, PETRI_TRANSITIONS=517} [2022-07-19 21:41:00,973 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 308 predicate places. [2022-07-19 21:41:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 517 transitions, 7410 flow [2022-07-19 21:41:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 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 21:41:00,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:00,974 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:00,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:01,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:41:01,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 21:41:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash 684691281, now seen corresponding path program 1 times [2022-07-19 21:41:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:01,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842354257] [2022-07-19 21:41:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842354257] [2022-07-19 21:41:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842354257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:01,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:01,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269630820] [2022-07-19 21:41:01,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:01,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:01,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:01,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 517 transitions, 7410 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:01,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:01,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:01,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:04,141 INFO L129 PetriNetUnfolder]: 4077/13269 cut-off events. [2022-07-19 21:41:04,142 INFO L130 PetriNetUnfolder]: For 131043/132024 co-relation queries the response was YES. [2022-07-19 21:41:04,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55309 conditions, 13269 events. 4077/13269 cut-off events. For 131043/132024 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 156798 event pairs, 1317 based on Foata normal form. 114/12065 useless extension candidates. Maximal degree in co-relation 55189. Up to 2965 conditions per place. [2022-07-19 21:41:04,313 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 389 selfloop transitions, 7 changer transitions 0/681 dead transitions. [2022-07-19 21:41:04,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 681 transitions, 11189 flow [2022-07-19 21:41:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:41:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:41:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-07-19 21:41:04,315 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-07-19 21:41:04,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-07-19 21:41:04,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-07-19 21:41:04,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:04,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-07-19 21:41:04,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 21:41:04,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 21:41:04,317 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 21:41:04,317 INFO L186 Difference]: Start difference. First operand has 449 places, 517 transitions, 7410 flow. Second operand 5 states and 690 transitions. [2022-07-19 21:41:04,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 681 transitions, 11189 flow [2022-07-19 21:41:05,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 681 transitions, 10869 flow, removed 95 selfloop flow, removed 59 redundant places. [2022-07-19 21:41:05,137 INFO L242 Difference]: Finished difference. Result has 369 places, 523 transitions, 7172 flow [2022-07-19 21:41:05,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7172, PETRI_PLACES=369, PETRI_TRANSITIONS=523} [2022-07-19 21:41:05,138 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 228 predicate places. [2022-07-19 21:41:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 523 transitions, 7172 flow [2022-07-19 21:41:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:05,139 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:05,139 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:41:05,139 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 21:41:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1996027203, now seen corresponding path program 1 times [2022-07-19 21:41:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913504090] [2022-07-19 21:41:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913504090] [2022-07-19 21:41:05,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913504090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:05,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:05,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:05,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033536844] [2022-07-19 21:41:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:05,245 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:05,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 523 transitions, 7172 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:05,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:05,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:05,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:07,413 INFO L129 PetriNetUnfolder]: 3525/11612 cut-off events. [2022-07-19 21:41:07,414 INFO L130 PetriNetUnfolder]: For 105935/106752 co-relation queries the response was YES. [2022-07-19 21:41:07,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47556 conditions, 11612 events. 3525/11612 cut-off events. For 105935/106752 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 133984 event pairs, 1232 based on Foata normal form. 328/11517 useless extension candidates. Maximal degree in co-relation 47461. Up to 3094 conditions per place. [2022-07-19 21:41:07,641 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 316 selfloop transitions, 7 changer transitions 41/624 dead transitions. [2022-07-19 21:41:07,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 624 transitions, 9872 flow [2022-07-19 21:41:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:41:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:41:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 812 transitions. [2022-07-19 21:41:07,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2022-07-19 21:41:07,643 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 812 transitions. [2022-07-19 21:41:07,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 812 transitions. [2022-07-19 21:41:07,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:07,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 812 transitions. [2022-07-19 21:41:07,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 21:41:07,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 21:41:07,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 21:41:07,644 INFO L186 Difference]: Start difference. First operand has 369 places, 523 transitions, 7172 flow. Second operand 6 states and 812 transitions. [2022-07-19 21:41:07,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 624 transitions, 9872 flow [2022-07-19 21:41:08,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 624 transitions, 9736 flow, removed 30 selfloop flow, removed 4 redundant places. [2022-07-19 21:41:08,208 INFO L242 Difference]: Finished difference. Result has 373 places, 489 transitions, 6480 flow [2022-07-19 21:41:08,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6480, PETRI_PLACES=373, PETRI_TRANSITIONS=489} [2022-07-19 21:41:08,209 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 232 predicate places. [2022-07-19 21:41:08,209 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 489 transitions, 6480 flow [2022-07-19 21:41:08,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:08,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:08,210 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:41:08,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 21:41:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1793788893, now seen corresponding path program 2 times [2022-07-19 21:41:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90888506] [2022-07-19 21:41:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90888506] [2022-07-19 21:41:08,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90888506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654372456] [2022-07-19 21:41:08,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:08,272 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:08,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:41:08,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:08,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:41:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:08,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:08,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654372456] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:08,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:41:08,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-19 21:41:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366794379] [2022-07-19 21:41:08,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:08,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:41:08,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:41:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:41:08,466 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-19 21:41:08,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 489 transitions, 6480 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 21:41:08,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:08,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-19 21:41:08,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:10,536 INFO L129 PetriNetUnfolder]: 2748/10331 cut-off events. [2022-07-19 21:41:10,537 INFO L130 PetriNetUnfolder]: For 98011/98999 co-relation queries the response was YES. [2022-07-19 21:41:10,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42466 conditions, 10331 events. 2748/10331 cut-off events. For 98011/98999 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 122476 event pairs, 714 based on Foata normal form. 389/10345 useless extension candidates. Maximal degree in co-relation 42371. Up to 2374 conditions per place. [2022-07-19 21:41:10,648 INFO L132 encePairwiseOnDemand]: 149/154 looper letters, 268 selfloop transitions, 9 changer transitions 11/553 dead transitions. [2022-07-19 21:41:10,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 553 transitions, 8313 flow [2022-07-19 21:41:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:41:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:41:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-07-19 21:41:10,663 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-07-19 21:41:10,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-07-19 21:41:10,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-07-19 21:41:10,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:10,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-07-19 21:41:10,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 21:41:10,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,665 INFO L186 Difference]: Start difference. First operand has 373 places, 489 transitions, 6480 flow. Second operand 4 states and 555 transitions. [2022-07-19 21:41:10,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 553 transitions, 8313 flow [2022-07-19 21:41:11,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 553 transitions, 8192 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-07-19 21:41:11,096 INFO L242 Difference]: Finished difference. Result has 364 places, 492 transitions, 6429 flow [2022-07-19 21:41:11,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6355, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6429, PETRI_PLACES=364, PETRI_TRANSITIONS=492} [2022-07-19 21:41:11,097 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 223 predicate places. [2022-07-19 21:41:11,097 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 492 transitions, 6429 flow [2022-07-19 21:41:11,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 21:41:11,097 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:11,097 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:11,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:11,312 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 21:41:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1329611087, now seen corresponding path program 3 times [2022-07-19 21:41:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:11,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109783475] [2022-07-19 21:41:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109783475] [2022-07-19 21:41:11,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109783475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:11,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:11,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230867940] [2022-07-19 21:41:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:11,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:11,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:11,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:11,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 492 transitions, 6429 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:11,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:11,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:11,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:13,977 INFO L129 PetriNetUnfolder]: 3824/13137 cut-off events. [2022-07-19 21:41:13,977 INFO L130 PetriNetUnfolder]: For 112513/113615 co-relation queries the response was YES. [2022-07-19 21:41:14,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54839 conditions, 13137 events. 3824/13137 cut-off events. For 112513/113615 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 157525 event pairs, 1156 based on Foata normal form. 191/12857 useless extension candidates. Maximal degree in co-relation 54746. Up to 3152 conditions per place. [2022-07-19 21:41:14,159 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 340 selfloop transitions, 13 changer transitions 16/629 dead transitions. [2022-07-19 21:41:14,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 629 transitions, 9619 flow [2022-07-19 21:41:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:41:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:41:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 823 transitions. [2022-07-19 21:41:14,161 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8906926406926406 [2022-07-19 21:41:14,161 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 823 transitions. [2022-07-19 21:41:14,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 823 transitions. [2022-07-19 21:41:14,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:14,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 823 transitions. [2022-07-19 21:41:14,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 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 21:41:14,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 21:41:14,163 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 21:41:14,163 INFO L186 Difference]: Start difference. First operand has 364 places, 492 transitions, 6429 flow. Second operand 6 states and 823 transitions. [2022-07-19 21:41:14,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 629 transitions, 9619 flow [2022-07-19 21:41:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 629 transitions, 9607 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:41:14,898 INFO L242 Difference]: Finished difference. Result has 372 places, 499 transitions, 6530 flow [2022-07-19 21:41:14,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6530, PETRI_PLACES=372, PETRI_TRANSITIONS=499} [2022-07-19 21:41:14,899 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 231 predicate places. [2022-07-19 21:41:14,899 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 499 transitions, 6530 flow [2022-07-19 21:41:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:14,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:14,900 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:41:14,900 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 21:41:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 585481907, now seen corresponding path program 2 times [2022-07-19 21:41:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966455909] [2022-07-19 21:41:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966455909] [2022-07-19 21:41:14,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966455909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297103857] [2022-07-19 21:41:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:14,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:14,960 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:41:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:41:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:15,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:15,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297103857] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:15,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:41:15,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-19 21:41:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392015845] [2022-07-19 21:41:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:41:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:41:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:41:15,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-19 21:41:15,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 499 transitions, 6530 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 21:41:15,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:15,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-19 21:41:15,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:17,397 INFO L129 PetriNetUnfolder]: 3072/10937 cut-off events. [2022-07-19 21:41:17,397 INFO L130 PetriNetUnfolder]: For 100969/102068 co-relation queries the response was YES. [2022-07-19 21:41:17,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47202 conditions, 10937 events. 3072/10937 cut-off events. For 100969/102068 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 128291 event pairs, 837 based on Foata normal form. 383/10922 useless extension candidates. Maximal degree in co-relation 47105. Up to 2040 conditions per place. [2022-07-19 21:41:17,522 INFO L132 encePairwiseOnDemand]: 149/154 looper letters, 218 selfloop transitions, 10 changer transitions 18/495 dead transitions. [2022-07-19 21:41:17,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 495 transitions, 6890 flow [2022-07-19 21:41:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:41:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:41:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-07-19 21:41:17,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-07-19 21:41:17,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-07-19 21:41:17,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-07-19 21:41:17,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:17,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-07-19 21:41:17,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 21:41:17,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:17,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:17,525 INFO L186 Difference]: Start difference. First operand has 372 places, 499 transitions, 6530 flow. Second operand 4 states and 555 transitions. [2022-07-19 21:41:17,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 495 transitions, 6890 flow [2022-07-19 21:41:18,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 495 transitions, 6716 flow, removed 23 selfloop flow, removed 10 redundant places. [2022-07-19 21:41:18,025 INFO L242 Difference]: Finished difference. Result has 363 places, 426 transitions, 4942 flow [2022-07-19 21:41:18,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4942, PETRI_PLACES=363, PETRI_TRANSITIONS=426} [2022-07-19 21:41:18,026 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 222 predicate places. [2022-07-19 21:41:18,026 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 426 transitions, 4942 flow [2022-07-19 21:41:18,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 21:41:18,026 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:18,026 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:18,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-19 21:41:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:18,244 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 21:41:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash -663964879, now seen corresponding path program 4 times [2022-07-19 21:41:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265339036] [2022-07-19 21:41:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265339036] [2022-07-19 21:41:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265339036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:18,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:18,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249877247] [2022-07-19 21:41:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:18,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:18,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 426 transitions, 4942 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:18,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:18,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:18,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:20,829 INFO L129 PetriNetUnfolder]: 3925/12666 cut-off events. [2022-07-19 21:41:20,829 INFO L130 PetriNetUnfolder]: For 107289/108095 co-relation queries the response was YES. [2022-07-19 21:41:20,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55313 conditions, 12666 events. 3925/12666 cut-off events. For 107289/108095 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 144991 event pairs, 1156 based on Foata normal form. 98/12262 useless extension candidates. Maximal degree in co-relation 55219. Up to 2889 conditions per place. [2022-07-19 21:41:20,994 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 269 selfloop transitions, 15 changer transitions 0/524 dead transitions. [2022-07-19 21:41:20,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 524 transitions, 7135 flow [2022-07-19 21:41:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:41:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:41:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2022-07-19 21:41:20,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8948051948051948 [2022-07-19 21:41:20,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2022-07-19 21:41:20,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2022-07-19 21:41:20,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:20,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2022-07-19 21:41:20,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:20,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 21:41:20,997 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 21:41:20,997 INFO L186 Difference]: Start difference. First operand has 363 places, 426 transitions, 4942 flow. Second operand 5 states and 689 transitions. [2022-07-19 21:41:20,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 524 transitions, 7135 flow [2022-07-19 21:41:21,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 524 transitions, 6982 flow, removed 25 selfloop flow, removed 7 redundant places. [2022-07-19 21:41:21,530 INFO L242 Difference]: Finished difference. Result has 360 places, 434 transitions, 4992 flow [2022-07-19 21:41:21,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4992, PETRI_PLACES=360, PETRI_TRANSITIONS=434} [2022-07-19 21:41:21,531 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 219 predicate places. [2022-07-19 21:41:21,531 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 434 transitions, 4992 flow [2022-07-19 21:41:21,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:21,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:21,531 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 21:41:21,532 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 21:41:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash -289117503, now seen corresponding path program 5 times [2022-07-19 21:41:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:21,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262332380] [2022-07-19 21:41:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:21,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:21,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262332380] [2022-07-19 21:41:21,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262332380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540389236] [2022-07-19 21:41:21,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:41:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:21,606 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:41:21,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:41:21,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:41:21,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:41:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:21,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540389236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:21,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-19 21:41:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736780183] [2022-07-19 21:41:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:21,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:41:21,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:41:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:41:21,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:21,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 434 transitions, 4992 flow. Second operand has 8 states, 8 states have (on average 129.375) internal successors, (1035), 8 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 21:41:21,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:21,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:21,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:25,168 INFO L129 PetriNetUnfolder]: 4736/15250 cut-off events. [2022-07-19 21:41:25,169 INFO L130 PetriNetUnfolder]: For 134787/135714 co-relation queries the response was YES. [2022-07-19 21:41:25,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65513 conditions, 15250 events. 4736/15250 cut-off events. For 134787/135714 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 181011 event pairs, 873 based on Foata normal form. 252/14992 useless extension candidates. Maximal degree in co-relation 65419. Up to 2418 conditions per place. [2022-07-19 21:41:25,378 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 320 selfloop transitions, 41 changer transitions 7/608 dead transitions. [2022-07-19 21:41:25,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 608 transitions, 8445 flow [2022-07-19 21:41:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:41:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:41:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1369 transitions. [2022-07-19 21:41:25,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.888961038961039 [2022-07-19 21:41:25,380 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1369 transitions. [2022-07-19 21:41:25,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1369 transitions. [2022-07-19 21:41:25,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:25,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1369 transitions. [2022-07-19 21:41:25,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 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 21:41:25,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 154.0) internal successors, (1694), 11 states have internal predecessors, (1694), 0 states have call successors, (0), 0 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 21:41:25,392 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 154.0) internal successors, (1694), 11 states have internal predecessors, (1694), 0 states have call successors, (0), 0 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 21:41:25,392 INFO L186 Difference]: Start difference. First operand has 360 places, 434 transitions, 4992 flow. Second operand 10 states and 1369 transitions. [2022-07-19 21:41:25,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 608 transitions, 8445 flow [2022-07-19 21:41:25,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 608 transitions, 8439 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:41:25,907 INFO L242 Difference]: Finished difference. Result has 377 places, 453 transitions, 5347 flow [2022-07-19 21:41:25,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5347, PETRI_PLACES=377, PETRI_TRANSITIONS=453} [2022-07-19 21:41:25,907 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 236 predicate places. [2022-07-19 21:41:25,908 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 453 transitions, 5347 flow [2022-07-19 21:41:25,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.375) internal successors, (1035), 8 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 21:41:25,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:25,908 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:25,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:26,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:26,112 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 21:41:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1860114485, now seen corresponding path program 6 times [2022-07-19 21:41:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:26,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774052313] [2022-07-19 21:41:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:41:26,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:26,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774052313] [2022-07-19 21:41:26,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774052313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:41:26,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:41:26,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:41:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931765987] [2022-07-19 21:41:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:41:26,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:41:26,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:41:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:41:26,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-19 21:41:26,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 453 transitions, 5347 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:26,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:26,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-19 21:41:26,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand