./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/parallel-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:36:50,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:36:50,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:36:50,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:36:50,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:36:50,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:36:50,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:36:50,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:36:50,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:36:50,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:36:50,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:36:50,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:36:50,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:36:50,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:36:50,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:36:50,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:36:50,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:36:50,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:36:50,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:36:50,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:36:50,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:36:50,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:36:50,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:36:50,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:36:50,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:36:50,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:36:50,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:36:50,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:36:50,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:36:50,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:36:50,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:36:50,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:36:50,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:36:50,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:36:50,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:36:50,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:36:50,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:36:50,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:36:50,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:36:50,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:36:50,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:36:50,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:36:50,989 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:36:50,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:36:50,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:36:50,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:36:50,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:36:50,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:36:50,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:36:50,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:36:50,993 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:36:50,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:36:50,994 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:36:50,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:36:50,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:36:50,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:36:50,995 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:36:50,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:36:50,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:36:50,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:36:50,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:36:50,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:36:50,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:36:50,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:36:50,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:36:50,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:36:50,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:36:50,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:36:50,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:36:50,998 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:36:50,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:36:50,999 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:36:50,999 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:36:51,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:36:51,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:36:51,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:36:51,375 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:36:51,376 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:36:51,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 19:36:52,453 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:36:52,689 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:36:52,689 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 19:36:52,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e63d974/8d7e7575e59940dc8e7025ba5217de01/FLAGecb714f0d [2023-08-30 19:36:52,719 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e63d974/8d7e7575e59940dc8e7025ba5217de01 [2023-08-30 19:36:52,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:36:52,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:36:52,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:36:52,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:36:52,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:36:52,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:52" (1/1) ... [2023-08-30 19:36:52,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2277d849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:52, skipping insertion in model container [2023-08-30 19:36:52,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:36:52" (1/1) ... [2023-08-30 19:36:52,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:36:52,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:36:52,970 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2023-08-30 19:36:52,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:36:52,998 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:36:53,033 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2023-08-30 19:36:53,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:36:53,056 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:36:53,057 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:36:53,063 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:36:53,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53 WrapperNode [2023-08-30 19:36:53,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:36:53,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:36:53,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:36:53,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:36:53,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,127 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 243 [2023-08-30 19:36:53,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:36:53,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:36:53,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:36:53,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:36:53,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:36:53,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:36:53,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:36:53,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:36:53,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (1/1) ... [2023-08-30 19:36:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:36:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:36:53,228 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) [2023-08-30 19:36:53,239 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 [2023-08-30 19:36:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:36:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:36:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:36:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:36:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:36:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:36:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:36:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:36:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:36:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:36:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:36:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:36:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:36:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:36:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:36:53,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:36:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:36:53,271 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:36:53,376 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:36:53,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:36:53,732 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:36:53,817 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:36:53,817 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 19:36:53,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:36:53 BoogieIcfgContainer [2023-08-30 19:36:53,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:36:53,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:36:53,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:36:53,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:36:53,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:36:52" (1/3) ... [2023-08-30 19:36:53,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:36:53, skipping insertion in model container [2023-08-30 19:36:53,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:36:53" (2/3) ... [2023-08-30 19:36:53,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:36:53, skipping insertion in model container [2023-08-30 19:36:53,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:36:53" (3/3) ... [2023-08-30 19:36:53,828 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-08-30 19:36:53,835 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:36:53,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:36:53,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:36:53,844 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:36:53,919 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:36:53,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 180 transitions, 384 flow [2023-08-30 19:36:54,061 INFO L130 PetriNetUnfolder]: 7/177 cut-off events. [2023-08-30 19:36:54,062 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:36:54,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 7/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-08-30 19:36:54,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 180 transitions, 384 flow [2023-08-30 19:36:54,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 167 transitions, 352 flow [2023-08-30 19:36:54,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:36:54,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 167 transitions, 352 flow [2023-08-30 19:36:54,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 167 transitions, 352 flow [2023-08-30 19:36:54,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 167 transitions, 352 flow [2023-08-30 19:36:54,150 INFO L130 PetriNetUnfolder]: 7/167 cut-off events. [2023-08-30 19:36:54,150 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:36:54,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 167 events. 7/167 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-08-30 19:36:54,152 INFO L119 LiptonReduction]: Number of co-enabled transitions 1266 [2023-08-30 19:36:59,591 INFO L134 LiptonReduction]: Checked pairs total: 7223 [2023-08-30 19:36:59,591 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-30 19:36:59,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:36:59,609 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@653347c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:36:59,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:36:59,618 INFO L130 PetriNetUnfolder]: 1/35 cut-off events. [2023-08-30 19:36:59,618 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:36:59,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:36:59,619 INFO L208 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] [2023-08-30 19:36:59,619 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)] === [2023-08-30 19:36:59,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:36:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1679152980, now seen corresponding path program 1 times [2023-08-30 19:36:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:36:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136797317] [2023-08-30 19:36:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:36:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:36:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136797317] [2023-08-30 19:37:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136797317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:37:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949791649] [2023-08-30 19:37:00,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:00,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:37:00,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:37:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:37:00,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-30 19:37:00,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:00,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-30 19:37:00,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:00,477 INFO L130 PetriNetUnfolder]: 406/717 cut-off events. [2023-08-30 19:37:00,477 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 19:37:00,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 717 events. 406/717 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3277 event pairs, 405 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1330. Up to 667 conditions per place. [2023-08-30 19:37:00,484 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 25 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 19:37:00,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 146 flow [2023-08-30 19:37:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:37:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:37:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-30 19:37:00,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-30 19:37:00,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-30 19:37:00,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-30 19:37:00,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:00,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-30 19:37:00,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,513 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 90 flow. Second operand 3 states and 481 transitions. [2023-08-30 19:37:00,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 146 flow [2023-08-30 19:37:00,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:37:00,517 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 90 flow [2023-08-30 19:37:00,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-30 19:37:00,521 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-08-30 19:37:00,522 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 90 flow [2023-08-30 19:37:00,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:00,523 INFO L208 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] [2023-08-30 19:37:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:37:00,523 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)] === [2023-08-30 19:37:00,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1807884856, now seen corresponding path program 1 times [2023-08-30 19:37:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306345441] [2023-08-30 19:37:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:00,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:00,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306345441] [2023-08-30 19:37:00,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306345441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:00,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:37:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746665859] [2023-08-30 19:37:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:37:00,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:37:00,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:00,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:00,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:37:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:01,228 INFO L130 PetriNetUnfolder]: 1344/2387 cut-off events. [2023-08-30 19:37:01,228 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 19:37:01,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2387 events. 1344/2387 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13533 event pairs, 243 based on Foata normal form. 30/2415 useless extension candidates. Maximal degree in co-relation 4672. Up to 695 conditions per place. [2023-08-30 19:37:01,242 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 102 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-08-30 19:37:01,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 514 flow [2023-08-30 19:37:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1396 transitions. [2023-08-30 19:37:01,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743459055385661 [2023-08-30 19:37:01,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1396 transitions. [2023-08-30 19:37:01,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1396 transitions. [2023-08-30 19:37:01,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:01,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1396 transitions. [2023-08-30 19:37:01,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.11111111111111) internal successors, (1396), 9 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,258 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,258 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 90 flow. Second operand 9 states and 1396 transitions. [2023-08-30 19:37:01,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 514 flow [2023-08-30 19:37:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 124 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 19:37:01,261 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-08-30 19:37:01,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-30 19:37:01,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-30 19:37:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-08-30 19:37:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:01,264 INFO L208 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] [2023-08-30 19:37:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:37:01,264 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)] === [2023-08-30 19:37:01,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2091808474, now seen corresponding path program 2 times [2023-08-30 19:37:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965033322] [2023-08-30 19:37:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965033322] [2023-08-30 19:37:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965033322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:01,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:01,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:37:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091364797] [2023-08-30 19:37:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:01,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:37:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:37:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:37:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 19:37:01,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:01,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 19:37:01,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:01,671 INFO L130 PetriNetUnfolder]: 1068/1983 cut-off events. [2023-08-30 19:37:01,672 INFO L131 PetriNetUnfolder]: For 375/375 co-relation queries the response was YES. [2023-08-30 19:37:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4383 conditions, 1983 events. 1068/1983 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11762 event pairs, 893 based on Foata normal form. 20/1959 useless extension candidates. Maximal degree in co-relation 4362. Up to 1600 conditions per place. [2023-08-30 19:37:01,684 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 44 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 19:37:01,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 301 flow [2023-08-30 19:37:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:37:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:37:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 19:37:01,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-30 19:37:01,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 19:37:01,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 19:37:01,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:01,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 19:37:01,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,691 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 3 states and 495 transitions. [2023-08-30 19:37:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 301 flow [2023-08-30 19:37:01,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 301 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 19:37:01,701 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 190 flow [2023-08-30 19:37:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 19:37:01,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-30 19:37:01,705 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 190 flow [2023-08-30 19:37:01,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:01,706 INFO L208 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] [2023-08-30 19:37:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:37:01,707 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)] === [2023-08-30 19:37:01,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 124098926, now seen corresponding path program 3 times [2023-08-30 19:37:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759495603] [2023-08-30 19:37:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:02,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759495603] [2023-08-30 19:37:02,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759495603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:02,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775489444] [2023-08-30 19:37:02,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:37:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:02,402 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) [2023-08-30 19:37:02,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:37:02,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:37:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:37:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:03,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:03,062 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:03,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:37:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775489444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:03,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:37:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-30 19:37:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562136609] [2023-08-30 19:37:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:03,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:03,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:37:03,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:03,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:03,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:03,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:03,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:03,879 INFO L130 PetriNetUnfolder]: 1534/2633 cut-off events. [2023-08-30 19:37:03,879 INFO L131 PetriNetUnfolder]: For 639/639 co-relation queries the response was YES. [2023-08-30 19:37:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 2633 events. 1534/2633 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14935 event pairs, 307 based on Foata normal form. 2/2573 useless extension candidates. Maximal degree in co-relation 6034. Up to 1421 conditions per place. [2023-08-30 19:37:03,895 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 88 selfloop transitions, 11 changer transitions 23/137 dead transitions. [2023-08-30 19:37:03,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 137 transitions, 694 flow [2023-08-30 19:37:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1359 transitions. [2023-08-30 19:37:03,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4617737003058104 [2023-08-30 19:37:03,899 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1359 transitions. [2023-08-30 19:37:03,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1359 transitions. [2023-08-30 19:37:03,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:03,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1359 transitions. [2023-08-30 19:37:03,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.0) internal successors, (1359), 9 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:03,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:03,908 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:03,908 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 190 flow. Second operand 9 states and 1359 transitions. [2023-08-30 19:37:03,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 137 transitions, 694 flow [2023-08-30 19:37:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 137 transitions, 690 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 19:37:03,917 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 251 flow [2023-08-30 19:37:03,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-30 19:37:03,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2023-08-30 19:37:03,919 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 251 flow [2023-08-30 19:37:03,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:03,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:03,920 INFO L208 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] [2023-08-30 19:37:03,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:04,126 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)] === [2023-08-30 19:37:04,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1110793696, now seen corresponding path program 4 times [2023-08-30 19:37:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451565226] [2023-08-30 19:37:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:05,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:05,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451565226] [2023-08-30 19:37:05,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451565226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:05,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612035477] [2023-08-30 19:37:05,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:37:05,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:05,002 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) [2023-08-30 19:37:05,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:37:05,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:37:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:37:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:05,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:05,267 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:05,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:37:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612035477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:05,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:37:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-30 19:37:05,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607843470] [2023-08-30 19:37:05,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:05,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:05,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:37:05,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:05,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:05,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:05,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:05,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:06,156 INFO L130 PetriNetUnfolder]: 2114/3781 cut-off events. [2023-08-30 19:37:06,156 INFO L131 PetriNetUnfolder]: For 1863/1863 co-relation queries the response was YES. [2023-08-30 19:37:06,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 3781 events. 2114/3781 cut-off events. For 1863/1863 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24184 event pairs, 457 based on Foata normal form. 2/3712 useless extension candidates. Maximal degree in co-relation 9939. Up to 1577 conditions per place. [2023-08-30 19:37:06,177 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 124 selfloop transitions, 14 changer transitions 27/180 dead transitions. [2023-08-30 19:37:06,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 180 transitions, 1023 flow [2023-08-30 19:37:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1377 transitions. [2023-08-30 19:37:06,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46788990825688076 [2023-08-30 19:37:06,181 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1377 transitions. [2023-08-30 19:37:06,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1377 transitions. [2023-08-30 19:37:06,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:06,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1377 transitions. [2023-08-30 19:37:06,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.0) internal successors, (1377), 9 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:06,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:06,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:06,190 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 251 flow. Second operand 9 states and 1377 transitions. [2023-08-30 19:37:06,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 180 transitions, 1023 flow [2023-08-30 19:37:06,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1017 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 19:37:06,202 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 366 flow [2023-08-30 19:37:06,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-30 19:37:06,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2023-08-30 19:37:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 366 flow [2023-08-30 19:37:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:06,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:06,204 INFO L208 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] [2023-08-30 19:37:06,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:06,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:06,411 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)] === [2023-08-30 19:37:06,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2111945012, now seen corresponding path program 5 times [2023-08-30 19:37:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:06,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672328705] [2023-08-30 19:37:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672328705] [2023-08-30 19:37:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672328705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308101767] [2023-08-30 19:37:07,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:37:07,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:07,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:07,169 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) [2023-08-30 19:37:07,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:37:07,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:37:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:37:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:07,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-08-30 19:37:07,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-30 19:37:07,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-30 19:37:07,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-30 19:37:07,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:07,704 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-08-30 19:37:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:08,237 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4))) (.cse3 (+ c_~f~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< .cse0 0) (<= c_~n~0 .cse0) (< c_~n~0 (+ 2 (select .cse1 (+ (* (select .cse1 .cse2) 4) c_~f~0.offset)))))))) (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (< .cse4 0) (<= c_~n~0 .cse4) (< (select .cse5 (+ (* (select .cse5 .cse2) 4) c_~f~0.offset)) 1))))))) is different from false [2023-08-30 19:37:08,296 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4))) (.cse3 (+ c_~f~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (<= c_~n~0 .cse0) (< (select .cse1 (+ c_~f~0.offset (* (select .cse1 .cse2) 4))) 1) (< .cse0 0))))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse5 (select .cse4 .cse3))) (or (< c_~n~0 (+ (select .cse4 (+ c_~f~0.offset (* (select .cse4 .cse2) 4))) 2)) (<= c_~n~0 .cse5) (< .cse5 0))))))) is different from false [2023-08-30 19:37:09,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:09,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2023-08-30 19:37:09,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:09,111 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 1024 treesize of output 980 [2023-08-30 19:37:09,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:09,160 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 432 [2023-08-30 19:37:09,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:09,194 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 178 [2023-08-30 19:37:09,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:09,234 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 175 [2023-08-30 19:37:10,130 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 19:37:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 1 [2023-08-30 19:37:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:10,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308101767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:37:10,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:37:10,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-08-30 19:37:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138624550] [2023-08-30 19:37:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:37:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:37:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:37:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=643, Unknown=2, NotChecked=110, Total=930 [2023-08-30 19:37:10,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 327 [2023-08-30 19:37:10,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 366 flow. Second operand has 31 states, 31 states have (on average 111.54838709677419) internal successors, (3458), 31 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:10,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:10,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 327 [2023-08-30 19:37:10,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:12,496 INFO L130 PetriNetUnfolder]: 4532/8165 cut-off events. [2023-08-30 19:37:12,497 INFO L131 PetriNetUnfolder]: For 8540/8541 co-relation queries the response was YES. [2023-08-30 19:37:12,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23985 conditions, 8165 events. 4532/8165 cut-off events. For 8540/8541 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 60776 event pairs, 1160 based on Foata normal form. 20/8042 useless extension candidates. Maximal degree in co-relation 23922. Up to 3163 conditions per place. [2023-08-30 19:37:12,538 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 58 selfloop transitions, 9 changer transitions 182/264 dead transitions. [2023-08-30 19:37:12,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 264 transitions, 1725 flow [2023-08-30 19:37:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:37:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:37:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1707 transitions. [2023-08-30 19:37:12,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372870249017038 [2023-08-30 19:37:12,543 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1707 transitions. [2023-08-30 19:37:12,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1707 transitions. [2023-08-30 19:37:12,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:12,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1707 transitions. [2023-08-30 19:37:12,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 121.92857142857143) internal successors, (1707), 14 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:12,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:12,556 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:12,557 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 366 flow. Second operand 14 states and 1707 transitions. [2023-08-30 19:37:12,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 264 transitions, 1725 flow [2023-08-30 19:37:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 264 transitions, 1681 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-30 19:37:12,622 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 459 flow [2023-08-30 19:37:12,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=459, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2023-08-30 19:37:12,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2023-08-30 19:37:12,624 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 459 flow [2023-08-30 19:37:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 111.54838709677419) internal successors, (3458), 31 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:12,626 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:12,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:12,832 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)] === [2023-08-30 19:37:12,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1199619666, now seen corresponding path program 6 times [2023-08-30 19:37:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:12,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238486616] [2023-08-30 19:37:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:13,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238486616] [2023-08-30 19:37:13,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238486616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:13,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:13,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 19:37:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692464554] [2023-08-30 19:37:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:13,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:37:13,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:13,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 459 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:13,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:13,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:13,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:13,986 INFO L130 PetriNetUnfolder]: 2557/4655 cut-off events. [2023-08-30 19:37:13,986 INFO L131 PetriNetUnfolder]: For 11697/11697 co-relation queries the response was YES. [2023-08-30 19:37:14,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 4655 events. 2557/4655 cut-off events. For 11697/11697 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 31664 event pairs, 664 based on Foata normal form. 2/4587 useless extension candidates. Maximal degree in co-relation 17524. Up to 2174 conditions per place. [2023-08-30 19:37:14,020 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 120 selfloop transitions, 17 changer transitions 24/176 dead transitions. [2023-08-30 19:37:14,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 176 transitions, 1313 flow [2023-08-30 19:37:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1373 transitions. [2023-08-30 19:37:14,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46653075093442065 [2023-08-30 19:37:14,039 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1373 transitions. [2023-08-30 19:37:14,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1373 transitions. [2023-08-30 19:37:14,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:14,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1373 transitions. [2023-08-30 19:37:14,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.55555555555554) internal successors, (1373), 9 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:14,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:14,048 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:14,048 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 459 flow. Second operand 9 states and 1373 transitions. [2023-08-30 19:37:14,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 176 transitions, 1313 flow [2023-08-30 19:37:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 176 transitions, 1210 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-08-30 19:37:14,103 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 564 flow [2023-08-30 19:37:14,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2023-08-30 19:37:14,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2023-08-30 19:37:14,104 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 564 flow [2023-08-30 19:37:14,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:14,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:14,105 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:14,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:37:14,105 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)] === [2023-08-30 19:37:14,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -675219394, now seen corresponding path program 7 times [2023-08-30 19:37:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:14,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075377863] [2023-08-30 19:37:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:15,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:15,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075377863] [2023-08-30 19:37:15,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075377863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:15,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708323517] [2023-08-30 19:37:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:37:15,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:15,040 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) [2023-08-30 19:37:15,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:37:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:37:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:15,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:15,343 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:15,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:15,486 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 19:37:15,486 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 19:37:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:15,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708323517] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:15,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:37:15,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-08-30 19:37:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562635332] [2023-08-30 19:37:15,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:15,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:37:15,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:15,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:15,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:15,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:15,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:16,356 INFO L130 PetriNetUnfolder]: 2528/4620 cut-off events. [2023-08-30 19:37:16,356 INFO L131 PetriNetUnfolder]: For 12525/12525 co-relation queries the response was YES. [2023-08-30 19:37:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17498 conditions, 4620 events. 2528/4620 cut-off events. For 12525/12525 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 31252 event pairs, 893 based on Foata normal form. 2/4546 useless extension candidates. Maximal degree in co-relation 17452. Up to 3072 conditions per place. [2023-08-30 19:37:16,387 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 97 selfloop transitions, 22 changer transitions 27/161 dead transitions. [2023-08-30 19:37:16,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 161 transitions, 1210 flow [2023-08-30 19:37:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2023-08-30 19:37:16,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624532789670404 [2023-08-30 19:37:16,392 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2023-08-30 19:37:16,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2023-08-30 19:37:16,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:16,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2023-08-30 19:37:16,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:16,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:16,401 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:16,401 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 564 flow. Second operand 9 states and 1361 transitions. [2023-08-30 19:37:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 161 transitions, 1210 flow [2023-08-30 19:37:16,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 161 transitions, 1161 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-30 19:37:16,455 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 634 flow [2023-08-30 19:37:16,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=634, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2023-08-30 19:37:16,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2023-08-30 19:37:16,458 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 634 flow [2023-08-30 19:37:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:16,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:16,459 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:16,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:16,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:16,665 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)] === [2023-08-30 19:37:16,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:16,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1951083324, now seen corresponding path program 8 times [2023-08-30 19:37:16,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:16,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777996507] [2023-08-30 19:37:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:16,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777996507] [2023-08-30 19:37:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777996507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:37:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812209682] [2023-08-30 19:37:16,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:37:16,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:37:16,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:16,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:16,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:37:16,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:17,989 INFO L130 PetriNetUnfolder]: 3793/7238 cut-off events. [2023-08-30 19:37:17,989 INFO L131 PetriNetUnfolder]: For 22384/22543 co-relation queries the response was YES. [2023-08-30 19:37:18,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26982 conditions, 7238 events. 3793/7238 cut-off events. For 22384/22543 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 53663 event pairs, 1423 based on Foata normal form. 42/7238 useless extension candidates. Maximal degree in co-relation 26936. Up to 4461 conditions per place. [2023-08-30 19:37:18,033 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 203 selfloop transitions, 18 changer transitions 10/241 dead transitions. [2023-08-30 19:37:18,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 241 transitions, 2321 flow [2023-08-30 19:37:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:37:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:37:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1689 transitions. [2023-08-30 19:37:18,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469557964970809 [2023-08-30 19:37:18,038 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1689 transitions. [2023-08-30 19:37:18,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1689 transitions. [2023-08-30 19:37:18,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:18,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1689 transitions. [2023-08-30 19:37:18,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.54545454545453) internal successors, (1689), 11 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:18,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:18,048 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:18,048 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 634 flow. Second operand 11 states and 1689 transitions. [2023-08-30 19:37:18,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 241 transitions, 2321 flow [2023-08-30 19:37:18,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 241 transitions, 2174 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-08-30 19:37:18,138 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 736 flow [2023-08-30 19:37:18,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=736, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2023-08-30 19:37:18,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2023-08-30 19:37:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 736 flow [2023-08-30 19:37:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:18,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:18,152 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:37:18,152 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)] === [2023-08-30 19:37:18,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 174753486, now seen corresponding path program 9 times [2023-08-30 19:37:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996526154] [2023-08-30 19:37:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996526154] [2023-08-30 19:37:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996526154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575562713] [2023-08-30 19:37:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:37:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:19,008 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) [2023-08-30 19:37:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:37:19,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:37:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:19,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:37:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:19,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:19,297 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:19,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:37:19,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575562713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:19,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:37:19,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-08-30 19:37:19,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087055372] [2023-08-30 19:37:19,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:37:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:37:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:37:21,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:37:23,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:37:25,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 19:37:25,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-30 19:37:25,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:25,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:25,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-30 19:37:25,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:26,790 INFO L130 PetriNetUnfolder]: 4648/8535 cut-off events. [2023-08-30 19:37:26,791 INFO L131 PetriNetUnfolder]: For 27575/27591 co-relation queries the response was YES. [2023-08-30 19:37:26,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 8535 events. 4648/8535 cut-off events. For 27575/27591 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 64893 event pairs, 1031 based on Foata normal form. 20/8468 useless extension candidates. Maximal degree in co-relation 33469. Up to 4923 conditions per place. [2023-08-30 19:37:26,845 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 156 selfloop transitions, 20 changer transitions 32/232 dead transitions. [2023-08-30 19:37:26,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 232 transitions, 1912 flow [2023-08-30 19:37:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:37:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:37:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1360 transitions. [2023-08-30 19:37:26,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621134896364254 [2023-08-30 19:37:26,849 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1360 transitions. [2023-08-30 19:37:26,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1360 transitions. [2023-08-30 19:37:26,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:26,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1360 transitions. [2023-08-30 19:37:26,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.11111111111111) internal successors, (1360), 9 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:26,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:26,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:26,856 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 736 flow. Second operand 9 states and 1360 transitions. [2023-08-30 19:37:26,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 232 transitions, 1912 flow [2023-08-30 19:37:26,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 232 transitions, 1908 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:37:26,993 INFO L231 Difference]: Finished difference. Result has 120 places, 107 transitions, 891 flow [2023-08-30 19:37:26,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=891, PETRI_PLACES=120, PETRI_TRANSITIONS=107} [2023-08-30 19:37:26,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2023-08-30 19:37:26,995 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 107 transitions, 891 flow [2023-08-30 19:37:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:26,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:26,995 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:27,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 19:37:27,203 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)] === [2023-08-30 19:37:27,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash 951031568, now seen corresponding path program 10 times [2023-08-30 19:37:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:27,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652120104] [2023-08-30 19:37:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:27,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652120104] [2023-08-30 19:37:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652120104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047779201] [2023-08-30 19:37:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:37:27,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:27,905 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) [2023-08-30 19:37:27,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:37:27,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:37:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:37:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:28,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:28,106 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:28,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:37:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047779201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:37:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-30 19:37:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153912036] [2023-08-30 19:37:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:37:28,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:28,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 107 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:28,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:28,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:29,289 INFO L130 PetriNetUnfolder]: 4831/8901 cut-off events. [2023-08-30 19:37:29,289 INFO L131 PetriNetUnfolder]: For 37081/37097 co-relation queries the response was YES. [2023-08-30 19:37:29,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37681 conditions, 8901 events. 4831/8901 cut-off events. For 37081/37097 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 68199 event pairs, 1153 based on Foata normal form. 20/8834 useless extension candidates. Maximal degree in co-relation 37626. Up to 5467 conditions per place. [2023-08-30 19:37:29,352 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 181 selfloop transitions, 23 changer transitions 21/249 dead transitions. [2023-08-30 19:37:29,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 249 transitions, 2142 flow [2023-08-30 19:37:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:37:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:37:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1530 transitions. [2023-08-30 19:37:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46788990825688076 [2023-08-30 19:37:29,357 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1530 transitions. [2023-08-30 19:37:29,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1530 transitions. [2023-08-30 19:37:29,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:29,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1530 transitions. [2023-08-30 19:37:29,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:29,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:29,364 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:29,364 INFO L175 Difference]: Start difference. First operand has 120 places, 107 transitions, 891 flow. Second operand 10 states and 1530 transitions. [2023-08-30 19:37:29,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 249 transitions, 2142 flow [2023-08-30 19:37:29,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 249 transitions, 2067 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-30 19:37:29,613 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 932 flow [2023-08-30 19:37:29,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=932, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2023-08-30 19:37:29,613 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2023-08-30 19:37:29,614 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 932 flow [2023-08-30 19:37:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:29,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:29,615 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:29,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:29,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:29,821 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)] === [2023-08-30 19:37:29,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 714877538, now seen corresponding path program 11 times [2023-08-30 19:37:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:29,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630357590] [2023-08-30 19:37:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:30,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630357590] [2023-08-30 19:37:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630357590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695376227] [2023-08-30 19:37:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:37:30,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:30,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:30,689 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) [2023-08-30 19:37:30,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:37:30,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:37:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 19:37:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:30,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:30,915 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:30,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:31,025 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 19:37:31,025 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 19:37:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695376227] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:37:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-08-30 19:37:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094928516] [2023-08-30 19:37:31,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:37:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:37:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:37:31,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:37:31,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 932 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:31,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:31,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:37:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:32,096 INFO L130 PetriNetUnfolder]: 4724/8678 cut-off events. [2023-08-30 19:37:32,096 INFO L131 PetriNetUnfolder]: For 34386/34402 co-relation queries the response was YES. [2023-08-30 19:37:32,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37150 conditions, 8678 events. 4724/8678 cut-off events. For 34386/34402 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 66062 event pairs, 1181 based on Foata normal form. 20/8611 useless extension candidates. Maximal degree in co-relation 37094. Up to 5467 conditions per place. [2023-08-30 19:37:32,150 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 151 selfloop transitions, 21 changer transitions 30/226 dead transitions. [2023-08-30 19:37:32,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 226 transitions, 1964 flow [2023-08-30 19:37:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:37:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:37:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1236 transitions. [2023-08-30 19:37:32,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724770642201835 [2023-08-30 19:37:32,154 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1236 transitions. [2023-08-30 19:37:32,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1236 transitions. [2023-08-30 19:37:32,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:32,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1236 transitions. [2023-08-30 19:37:32,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.5) internal successors, (1236), 8 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:32,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:32,161 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:32,161 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 932 flow. Second operand 8 states and 1236 transitions. [2023-08-30 19:37:32,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 226 transitions, 1964 flow [2023-08-30 19:37:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 226 transitions, 1901 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-30 19:37:32,484 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 893 flow [2023-08-30 19:37:32,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2023-08-30 19:37:32,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2023-08-30 19:37:32,485 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 893 flow [2023-08-30 19:37:32,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:32,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:32,485 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:32,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:32,691 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)] === [2023-08-30 19:37:32,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 681336652, now seen corresponding path program 12 times [2023-08-30 19:37:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553881159] [2023-08-30 19:37:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:33,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553881159] [2023-08-30 19:37:33,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553881159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199283574] [2023-08-30 19:37:33,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:37:33,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:33,353 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) [2023-08-30 19:37:33,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:37:33,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:37:33,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:33,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 19:37:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:37:33,607 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:37:33,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:33,719 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:37:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:33,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:37:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199283574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:33,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:37:33,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-30 19:37:33,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685087745] [2023-08-30 19:37:33,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:33,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:37:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:37:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:37:33,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 19:37:33,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:33,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:33,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 19:37:33,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:35,225 INFO L130 PetriNetUnfolder]: 4803/8956 cut-off events. [2023-08-30 19:37:35,225 INFO L131 PetriNetUnfolder]: For 34519/34533 co-relation queries the response was YES. [2023-08-30 19:37:35,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37726 conditions, 8956 events. 4803/8956 cut-off events. For 34519/34533 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 69574 event pairs, 1251 based on Foata normal form. 18/8877 useless extension candidates. Maximal degree in co-relation 37670. Up to 4569 conditions per place. [2023-08-30 19:37:35,280 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 154 selfloop transitions, 24 changer transitions 34/236 dead transitions. [2023-08-30 19:37:35,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 236 transitions, 2077 flow [2023-08-30 19:37:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:37:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:37:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1468 transitions. [2023-08-30 19:37:35,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489296636085627 [2023-08-30 19:37:35,285 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1468 transitions. [2023-08-30 19:37:35,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1468 transitions. [2023-08-30 19:37:35,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:35,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1468 transitions. [2023-08-30 19:37:35,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:35,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:35,293 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:35,293 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 893 flow. Second operand 10 states and 1468 transitions. [2023-08-30 19:37:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 236 transitions, 2077 flow [2023-08-30 19:37:35,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 236 transitions, 2014 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 19:37:35,506 INFO L231 Difference]: Finished difference. Result has 129 places, 113 transitions, 976 flow [2023-08-30 19:37:35,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=976, PETRI_PLACES=129, PETRI_TRANSITIONS=113} [2023-08-30 19:37:35,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2023-08-30 19:37:35,507 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 113 transitions, 976 flow [2023-08-30 19:37:35,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:35,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:35,507 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:37:35,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:37:35,708 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,SelfDestructingSolverStorable12 [2023-08-30 19:37:35,708 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)] === [2023-08-30 19:37:35,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1805207680, now seen corresponding path program 13 times [2023-08-30 19:37:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:35,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953414271] [2023-08-30 19:37:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:35,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:36,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953414271] [2023-08-30 19:37:36,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953414271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421592909] [2023-08-30 19:37:36,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:37:36,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:36,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:36,612 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) [2023-08-30 19:37:36,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:37:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:36,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 19:37:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:37,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:37:37,045 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-08-30 19:37:37,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:37,196 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2023-08-30 19:37:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:37,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:37,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:37,476 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 162 [2023-08-30 19:37:37,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:37,501 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2023-08-30 19:37:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:37:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421592909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:37:38,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:37:38,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 19:37:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818720728] [2023-08-30 19:37:38,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:37:38,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 19:37:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 19:37:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=933, Unknown=3, NotChecked=0, Total=1056 [2023-08-30 19:37:40,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:37:42,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:37:44,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:37:46,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:37:49,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:37:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 327 [2023-08-30 19:37:49,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 113 transitions, 976 flow. Second operand has 33 states, 33 states have (on average 115.0909090909091) internal successors, (3798), 33 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:37:49,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:49,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 327 [2023-08-30 19:37:49,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:00,230 WARN L222 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:38:02,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:13,441 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:38:15,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:18,799 INFO L130 PetriNetUnfolder]: 15545/28943 cut-off events. [2023-08-30 19:38:18,800 INFO L131 PetriNetUnfolder]: For 131042/131099 co-relation queries the response was YES. [2023-08-30 19:38:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124873 conditions, 28943 events. 15545/28943 cut-off events. For 131042/131099 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 266867 event pairs, 4624 based on Foata normal form. 57/28724 useless extension candidates. Maximal degree in co-relation 124334. Up to 8007 conditions per place. [2023-08-30 19:38:18,953 INFO L137 encePairwiseOnDemand]: 314/327 looper letters, 534 selfloop transitions, 103 changer transitions 65/726 dead transitions. [2023-08-30 19:38:18,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 726 transitions, 6762 flow [2023-08-30 19:38:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 19:38:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 19:38:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4237 transitions. [2023-08-30 19:38:18,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810937218924267 [2023-08-30 19:38:18,960 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4237 transitions. [2023-08-30 19:38:18,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4237 transitions. [2023-08-30 19:38:18,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:18,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4237 transitions. [2023-08-30 19:38:18,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 124.61764705882354) internal successors, (4237), 34 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:18,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 327.0) internal successors, (11445), 35 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:18,979 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 327.0) internal successors, (11445), 35 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:18,979 INFO L175 Difference]: Start difference. First operand has 129 places, 113 transitions, 976 flow. Second operand 34 states and 4237 transitions. [2023-08-30 19:38:18,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 726 transitions, 6762 flow [2023-08-30 19:38:20,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 726 transitions, 6457 flow, removed 114 selfloop flow, removed 6 redundant places. [2023-08-30 19:38:20,548 INFO L231 Difference]: Finished difference. Result has 168 places, 205 transitions, 2321 flow [2023-08-30 19:38:20,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2321, PETRI_PLACES=168, PETRI_TRANSITIONS=205} [2023-08-30 19:38:20,549 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2023-08-30 19:38:20,549 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 205 transitions, 2321 flow [2023-08-30 19:38:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.0909090909091) internal successors, (3798), 33 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:20,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:20,550 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:20,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 19:38:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:38:20,755 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)] === [2023-08-30 19:38:20,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -758409070, now seen corresponding path program 14 times [2023-08-30 19:38:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20828035] [2023-08-30 19:38:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:21,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:21,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20828035] [2023-08-30 19:38:21,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20828035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:21,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378397732] [2023-08-30 19:38:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:38:21,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:21,477 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) [2023-08-30 19:38:21,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:38:21,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:38:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:38:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:38:21,771 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:38:21,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:21,851 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:38:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:21,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:38:21,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378397732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:21,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:38:21,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-30 19:38:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061946447] [2023-08-30 19:38:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:21,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:38:21,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:38:21,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:38:22,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 19:38:22,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 205 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:22,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:22,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 19:38:22,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:26,194 INFO L130 PetriNetUnfolder]: 15417/28740 cut-off events. [2023-08-30 19:38:26,194 INFO L131 PetriNetUnfolder]: For 178692/178737 co-relation queries the response was YES. [2023-08-30 19:38:26,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140701 conditions, 28740 events. 15417/28740 cut-off events. For 178692/178737 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 265198 event pairs, 4092 based on Foata normal form. 65/28510 useless extension candidates. Maximal degree in co-relation 139880. Up to 16233 conditions per place. [2023-08-30 19:38:26,386 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 155 selfloop transitions, 79 changer transitions 72/330 dead transitions. [2023-08-30 19:38:26,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 330 transitions, 3807 flow [2023-08-30 19:38:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1332 transitions. [2023-08-30 19:38:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525993883792049 [2023-08-30 19:38:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1332 transitions. [2023-08-30 19:38:26,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1332 transitions. [2023-08-30 19:38:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1332 transitions. [2023-08-30 19:38:26,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.0) internal successors, (1332), 9 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:26,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:26,395 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:26,395 INFO L175 Difference]: Start difference. First operand has 168 places, 205 transitions, 2321 flow. Second operand 9 states and 1332 transitions. [2023-08-30 19:38:26,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 330 transitions, 3807 flow [2023-08-30 19:38:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 330 transitions, 3551 flow, removed 107 selfloop flow, removed 11 redundant places. [2023-08-30 19:38:28,569 INFO L231 Difference]: Finished difference. Result has 164 places, 182 transitions, 2083 flow [2023-08-30 19:38:28,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2083, PETRI_PLACES=164, PETRI_TRANSITIONS=182} [2023-08-30 19:38:28,569 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2023-08-30 19:38:28,570 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 182 transitions, 2083 flow [2023-08-30 19:38:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:28,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:28,570 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:28,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:28,775 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,SelfDestructingSolverStorable14 [2023-08-30 19:38:28,776 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)] === [2023-08-30 19:38:28,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1341670056, now seen corresponding path program 15 times [2023-08-30 19:38:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572880888] [2023-08-30 19:38:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:28,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572880888] [2023-08-30 19:38:28,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572880888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:28,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:28,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:38:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983957838] [2023-08-30 19:38:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:38:28,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:38:28,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 182 transitions, 2083 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:28,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:28,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:38:28,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:32,492 INFO L130 PetriNetUnfolder]: 14278/27888 cut-off events. [2023-08-30 19:38:32,492 INFO L131 PetriNetUnfolder]: For 191083/191504 co-relation queries the response was YES. [2023-08-30 19:38:32,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133526 conditions, 27888 events. 14278/27888 cut-off events. For 191083/191504 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 262721 event pairs, 6690 based on Foata normal form. 170/27921 useless extension candidates. Maximal degree in co-relation 133476. Up to 18583 conditions per place. [2023-08-30 19:38:32,657 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 356 selfloop transitions, 18 changer transitions 21/411 dead transitions. [2023-08-30 19:38:32,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 411 transitions, 5793 flow [2023-08-30 19:38:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1386 transitions. [2023-08-30 19:38:32,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709480122324159 [2023-08-30 19:38:32,660 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1386 transitions. [2023-08-30 19:38:32,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1386 transitions. [2023-08-30 19:38:32,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:32,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1386 transitions. [2023-08-30 19:38:32,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:32,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:32,665 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:32,665 INFO L175 Difference]: Start difference. First operand has 164 places, 182 transitions, 2083 flow. Second operand 9 states and 1386 transitions. [2023-08-30 19:38:32,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 411 transitions, 5793 flow [2023-08-30 19:38:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 411 transitions, 5293 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-08-30 19:38:34,628 INFO L231 Difference]: Finished difference. Result has 157 places, 187 transitions, 1983 flow [2023-08-30 19:38:34,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1983, PETRI_PLACES=157, PETRI_TRANSITIONS=187} [2023-08-30 19:38:34,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2023-08-30 19:38:34,629 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 187 transitions, 1983 flow [2023-08-30 19:38:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:34,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:34,629 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 19:38:34,630 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)] === [2023-08-30 19:38:34,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1576014398, now seen corresponding path program 16 times [2023-08-30 19:38:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596275356] [2023-08-30 19:38:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:34,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596275356] [2023-08-30 19:38:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596275356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:34,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:34,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:38:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771354309] [2023-08-30 19:38:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:38:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:38:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:38:34,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-30 19:38:34,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 187 transitions, 1983 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:34,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:34,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-30 19:38:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:37,670 INFO L130 PetriNetUnfolder]: 12896/25846 cut-off events. [2023-08-30 19:38:37,671 INFO L131 PetriNetUnfolder]: For 151367/151849 co-relation queries the response was YES. [2023-08-30 19:38:37,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118725 conditions, 25846 events. 12896/25846 cut-off events. For 151367/151849 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 246245 event pairs, 10771 based on Foata normal form. 176/25737 useless extension candidates. Maximal degree in co-relation 118672. Up to 23501 conditions per place. [2023-08-30 19:38:37,833 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 166 selfloop transitions, 2 changer transitions 7/211 dead transitions. [2023-08-30 19:38:37,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 2563 flow [2023-08-30 19:38:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:38:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:38:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 19:38:37,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-30 19:38:37,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 19:38:37,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 19:38:37,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:37,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 19:38:37,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:37,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:37,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:37,837 INFO L175 Difference]: Start difference. First operand has 157 places, 187 transitions, 1983 flow. Second operand 3 states and 495 transitions. [2023-08-30 19:38:37,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 2563 flow [2023-08-30 19:38:39,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 2546 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:38:39,505 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 1939 flow [2023-08-30 19:38:39,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1939, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2023-08-30 19:38:39,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2023-08-30 19:38:39,505 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 1939 flow [2023-08-30 19:38:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:39,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:39,506 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:38:39,506 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)] === [2023-08-30 19:38:39,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash -88521762, now seen corresponding path program 17 times [2023-08-30 19:38:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:39,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155713367] [2023-08-30 19:38:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:39,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:39,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:39,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155713367] [2023-08-30 19:38:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155713367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:39,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:38:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612394103] [2023-08-30 19:38:39,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:39,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:38:39,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:38:39,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:39,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:39,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:38:39,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:42,079 INFO L130 PetriNetUnfolder]: 10344/20384 cut-off events. [2023-08-30 19:38:42,080 INFO L131 PetriNetUnfolder]: For 111205/111449 co-relation queries the response was YES. [2023-08-30 19:38:42,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92303 conditions, 20384 events. 10344/20384 cut-off events. For 111205/111449 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 183955 event pairs, 5404 based on Foata normal form. 158/20423 useless extension candidates. Maximal degree in co-relation 92250. Up to 17628 conditions per place. [2023-08-30 19:38:42,197 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 212 selfloop transitions, 16 changer transitions 40/284 dead transitions. [2023-08-30 19:38:42,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 284 transitions, 3269 flow [2023-08-30 19:38:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:38:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:38:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1523 transitions. [2023-08-30 19:38:42,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657492354740061 [2023-08-30 19:38:42,200 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1523 transitions. [2023-08-30 19:38:42,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1523 transitions. [2023-08-30 19:38:42,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:42,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1523 transitions. [2023-08-30 19:38:42,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 152.3) internal successors, (1523), 10 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:42,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:42,205 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:42,205 INFO L175 Difference]: Start difference. First operand has 158 places, 184 transitions, 1939 flow. Second operand 10 states and 1523 transitions. [2023-08-30 19:38:42,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 284 transitions, 3269 flow [2023-08-30 19:38:43,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 3262 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 19:38:43,197 INFO L231 Difference]: Finished difference. Result has 165 places, 182 transitions, 1949 flow [2023-08-30 19:38:43,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1949, PETRI_PLACES=165, PETRI_TRANSITIONS=182} [2023-08-30 19:38:43,198 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2023-08-30 19:38:43,198 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 182 transitions, 1949 flow [2023-08-30 19:38:43,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:43,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:43,199 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:43,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 19:38:43,199 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)] === [2023-08-30 19:38:43,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2056628482, now seen corresponding path program 18 times [2023-08-30 19:38:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543017441] [2023-08-30 19:38:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:43,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:43,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543017441] [2023-08-30 19:38:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543017441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:43,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:38:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302462604] [2023-08-30 19:38:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:38:43,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:38:43,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 182 transitions, 1949 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:43,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:43,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:38:43,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:45,558 INFO L130 PetriNetUnfolder]: 7798/15997 cut-off events. [2023-08-30 19:38:45,558 INFO L131 PetriNetUnfolder]: For 87923/88078 co-relation queries the response was YES. [2023-08-30 19:38:45,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71014 conditions, 15997 events. 7798/15997 cut-off events. For 87923/88078 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 144512 event pairs, 2279 based on Foata normal form. 150/16099 useless extension candidates. Maximal degree in co-relation 70961. Up to 4514 conditions per place. [2023-08-30 19:38:45,644 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 305 selfloop transitions, 36 changer transitions 35/392 dead transitions. [2023-08-30 19:38:45,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 392 transitions, 5125 flow [2023-08-30 19:38:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1387 transitions. [2023-08-30 19:38:45,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712878015630309 [2023-08-30 19:38:45,646 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1387 transitions. [2023-08-30 19:38:45,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1387 transitions. [2023-08-30 19:38:45,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:45,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1387 transitions. [2023-08-30 19:38:45,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.11111111111111) internal successors, (1387), 9 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:45,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:45,650 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:45,650 INFO L175 Difference]: Start difference. First operand has 165 places, 182 transitions, 1949 flow. Second operand 9 states and 1387 transitions. [2023-08-30 19:38:45,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 392 transitions, 5125 flow [2023-08-30 19:38:46,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 392 transitions, 5080 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 19:38:46,245 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 2058 flow [2023-08-30 19:38:46,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2023-08-30 19:38:46,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2023-08-30 19:38:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 2058 flow [2023-08-30 19:38:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:46,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:46,246 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:46,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 19:38:46,247 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)] === [2023-08-30 19:38:46,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1221748060, now seen corresponding path program 19 times [2023-08-30 19:38:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789499898] [2023-08-30 19:38:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:46,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789499898] [2023-08-30 19:38:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789499898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:46,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:38:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983195056] [2023-08-30 19:38:46,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:38:46,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-30 19:38:46,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 2058 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:46,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:46,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-30 19:38:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:47,819 INFO L130 PetriNetUnfolder]: 4860/10018 cut-off events. [2023-08-30 19:38:47,819 INFO L131 PetriNetUnfolder]: For 51346/51418 co-relation queries the response was YES. [2023-08-30 19:38:47,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43048 conditions, 10018 events. 4860/10018 cut-off events. For 51346/51418 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 86564 event pairs, 2484 based on Foata normal form. 160/10106 useless extension candidates. Maximal degree in co-relation 42992. Up to 7349 conditions per place. [2023-08-30 19:38:47,871 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 125 selfloop transitions, 15 changer transitions 63/216 dead transitions. [2023-08-30 19:38:47,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 216 transitions, 2327 flow [2023-08-30 19:38:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1374 transitions. [2023-08-30 19:38:47,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46687054026503566 [2023-08-30 19:38:47,873 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1374 transitions. [2023-08-30 19:38:47,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1374 transitions. [2023-08-30 19:38:47,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:47,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1374 transitions. [2023-08-30 19:38:47,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.66666666666666) internal successors, (1374), 9 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:47,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:47,877 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:47,877 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 2058 flow. Second operand 9 states and 1374 transitions. [2023-08-30 19:38:47,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 216 transitions, 2327 flow [2023-08-30 19:38:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 2161 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-08-30 19:38:48,337 INFO L231 Difference]: Finished difference. Result has 164 places, 109 transitions, 919 flow [2023-08-30 19:38:48,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=919, PETRI_PLACES=164, PETRI_TRANSITIONS=109} [2023-08-30 19:38:48,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2023-08-30 19:38:48,337 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 109 transitions, 919 flow [2023-08-30 19:38:48,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:48,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:48,338 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 19:38:48,338 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)] === [2023-08-30 19:38:48,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1101595256, now seen corresponding path program 20 times [2023-08-30 19:38:48,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:48,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839947748] [2023-08-30 19:38:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:48,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:49,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839947748] [2023-08-30 19:38:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839947748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398924391] [2023-08-30 19:38:49,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:38:49,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:49,432 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) [2023-08-30 19:38:49,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:38:49,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:38:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:38:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:49,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:49,723 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:38:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:49,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:38:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398924391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:49,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:38:49,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-30 19:38:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491790474] [2023-08-30 19:38:49,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:38:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:38:49,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 109 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:49,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:49,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:38:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:50,610 INFO L130 PetriNetUnfolder]: 3132/6328 cut-off events. [2023-08-30 19:38:50,610 INFO L131 PetriNetUnfolder]: For 21561/21586 co-relation queries the response was YES. [2023-08-30 19:38:50,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24528 conditions, 6328 events. 3132/6328 cut-off events. For 21561/21586 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51103 event pairs, 1560 based on Foata normal form. 9/6097 useless extension candidates. Maximal degree in co-relation 24477. Up to 3667 conditions per place. [2023-08-30 19:38:50,641 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 110 selfloop transitions, 17 changer transitions 16/171 dead transitions. [2023-08-30 19:38:50,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 171 transitions, 1528 flow [2023-08-30 19:38:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1349 transitions. [2023-08-30 19:38:50,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583758069996602 [2023-08-30 19:38:50,643 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1349 transitions. [2023-08-30 19:38:50,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1349 transitions. [2023-08-30 19:38:50,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:50,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1349 transitions. [2023-08-30 19:38:50,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.88888888888889) internal successors, (1349), 9 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:50,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:50,647 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:50,647 INFO L175 Difference]: Start difference. First operand has 164 places, 109 transitions, 919 flow. Second operand 9 states and 1349 transitions. [2023-08-30 19:38:50,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 171 transitions, 1528 flow [2023-08-30 19:38:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 171 transitions, 1441 flow, removed 24 selfloop flow, removed 17 redundant places. [2023-08-30 19:38:50,744 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 937 flow [2023-08-30 19:38:50,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=937, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2023-08-30 19:38:50,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2023-08-30 19:38:50,745 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 937 flow [2023-08-30 19:38:50,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:50,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:50,745 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:50,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:50,946 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,SelfDestructingSolverStorable20 [2023-08-30 19:38:50,946 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)] === [2023-08-30 19:38:50,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1727604590, now seen corresponding path program 21 times [2023-08-30 19:38:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052855841] [2023-08-30 19:38:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052855841] [2023-08-30 19:38:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052855841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:51,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:38:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 19:38:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191668432] [2023-08-30 19:38:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:51,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:38:51,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:38:51,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:51,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:51,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:38:51,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:52,103 INFO L130 PetriNetUnfolder]: 3198/6532 cut-off events. [2023-08-30 19:38:52,103 INFO L131 PetriNetUnfolder]: For 20622/20647 co-relation queries the response was YES. [2023-08-30 19:38:52,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25630 conditions, 6532 events. 3198/6532 cut-off events. For 20622/20647 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 53054 event pairs, 1620 based on Foata normal form. 9/6301 useless extension candidates. Maximal degree in co-relation 25584. Up to 3883 conditions per place. [2023-08-30 19:38:52,135 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 126 selfloop transitions, 20 changer transitions 11/185 dead transitions. [2023-08-30 19:38:52,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 185 transitions, 1613 flow [2023-08-30 19:38:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:38:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:38:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1503 transitions. [2023-08-30 19:38:52,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596330275229358 [2023-08-30 19:38:52,137 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1503 transitions. [2023-08-30 19:38:52,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1503 transitions. [2023-08-30 19:38:52,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:52,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1503 transitions. [2023-08-30 19:38:52,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:52,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:52,141 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:52,141 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 937 flow. Second operand 10 states and 1503 transitions. [2023-08-30 19:38:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 185 transitions, 1613 flow [2023-08-30 19:38:52,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 1558 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-30 19:38:52,199 INFO L231 Difference]: Finished difference. Result has 155 places, 116 transitions, 969 flow [2023-08-30 19:38:52,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=969, PETRI_PLACES=155, PETRI_TRANSITIONS=116} [2023-08-30 19:38:52,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2023-08-30 19:38:52,199 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 116 transitions, 969 flow [2023-08-30 19:38:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:52,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:52,199 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:52,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 19:38:52,200 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)] === [2023-08-30 19:38:52,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash -261863682, now seen corresponding path program 22 times [2023-08-30 19:38:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:52,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656923938] [2023-08-30 19:38:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:53,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656923938] [2023-08-30 19:38:53,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656923938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396740293] [2023-08-30 19:38:53,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:38:53,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:53,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:53,092 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) [2023-08-30 19:38:53,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:38:53,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:38:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:38:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:53,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:53,292 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:38:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:53,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:38:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396740293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:53,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:38:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-08-30 19:38:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817638720] [2023-08-30 19:38:53,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:38:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:38:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:38:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-30 19:38:53,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 116 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:53,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:53,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-30 19:38:53,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:54,083 INFO L130 PetriNetUnfolder]: 3174/6424 cut-off events. [2023-08-30 19:38:54,083 INFO L131 PetriNetUnfolder]: For 20602/20627 co-relation queries the response was YES. [2023-08-30 19:38:54,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25652 conditions, 6424 events. 3174/6424 cut-off events. For 20602/20627 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 51848 event pairs, 1638 based on Foata normal form. 9/6193 useless extension candidates. Maximal degree in co-relation 25605. Up to 3883 conditions per place. [2023-08-30 19:38:54,114 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 100 selfloop transitions, 18 changer transitions 26/172 dead transitions. [2023-08-30 19:38:54,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 172 transitions, 1534 flow [2023-08-30 19:38:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:38:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:38:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1211 transitions. [2023-08-30 19:38:54,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629204892966361 [2023-08-30 19:38:54,115 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1211 transitions. [2023-08-30 19:38:54,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1211 transitions. [2023-08-30 19:38:54,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:54,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1211 transitions. [2023-08-30 19:38:54,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.375) internal successors, (1211), 8 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:54,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:54,118 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:54,118 INFO L175 Difference]: Start difference. First operand has 155 places, 116 transitions, 969 flow. Second operand 8 states and 1211 transitions. [2023-08-30 19:38:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 172 transitions, 1534 flow [2023-08-30 19:38:54,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 1483 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 19:38:54,174 INFO L231 Difference]: Finished difference. Result has 156 places, 114 transitions, 949 flow [2023-08-30 19:38:54,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=156, PETRI_TRANSITIONS=114} [2023-08-30 19:38:54,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2023-08-30 19:38:54,175 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 114 transitions, 949 flow [2023-08-30 19:38:54,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:54,175 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:54,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:54,376 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,SelfDestructingSolverStorable22 [2023-08-30 19:38:54,376 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)] === [2023-08-30 19:38:54,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash -537786768, now seen corresponding path program 23 times [2023-08-30 19:38:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919903205] [2023-08-30 19:38:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919903205] [2023-08-30 19:38:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919903205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416127449] [2023-08-30 19:38:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:38:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:55,135 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) [2023-08-30 19:38:55,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:38:55,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:38:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 19:38:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:38:55,368 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:38:55,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:55,424 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:38:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:55,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:38:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416127449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:55,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:38:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-08-30 19:38:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986190764] [2023-08-30 19:38:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:38:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:38:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:38:55,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 19:38:55,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 114 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:55,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:55,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 19:38:55,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:56,342 INFO L130 PetriNetUnfolder]: 2976/6160 cut-off events. [2023-08-30 19:38:56,342 INFO L131 PetriNetUnfolder]: For 19170/19195 co-relation queries the response was YES. [2023-08-30 19:38:56,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24308 conditions, 6160 events. 2976/6160 cut-off events. For 19170/19195 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50059 event pairs, 1665 based on Foata normal form. 9/5929 useless extension candidates. Maximal degree in co-relation 24261. Up to 3594 conditions per place. [2023-08-30 19:38:56,370 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 85 selfloop transitions, 17 changer transitions 27/157 dead transitions. [2023-08-30 19:38:56,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 1426 flow [2023-08-30 19:38:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:38:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:38:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1157 transitions. [2023-08-30 19:38:56,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422782874617737 [2023-08-30 19:38:56,371 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1157 transitions. [2023-08-30 19:38:56,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1157 transitions. [2023-08-30 19:38:56,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:56,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1157 transitions. [2023-08-30 19:38:56,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:56,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:56,375 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:56,375 INFO L175 Difference]: Start difference. First operand has 156 places, 114 transitions, 949 flow. Second operand 8 states and 1157 transitions. [2023-08-30 19:38:56,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 1426 flow [2023-08-30 19:38:56,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 1371 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-30 19:38:56,422 INFO L231 Difference]: Finished difference. Result has 155 places, 114 transitions, 961 flow [2023-08-30 19:38:56,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=155, PETRI_TRANSITIONS=114} [2023-08-30 19:38:56,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2023-08-30 19:38:56,422 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 114 transitions, 961 flow [2023-08-30 19:38:56,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:56,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:56,423 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:56,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:56,629 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,SelfDestructingSolverStorable23 [2023-08-30 19:38:56,629 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)] === [2023-08-30 19:38:56,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash -709821156, now seen corresponding path program 24 times [2023-08-30 19:38:56,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:56,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711409839] [2023-08-30 19:38:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:56,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:57,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:57,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711409839] [2023-08-30 19:38:57,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711409839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:57,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949454268] [2023-08-30 19:38:57,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:38:57,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:57,411 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) [2023-08-30 19:38:57,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:38:57,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:38:57,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 19:38:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:57,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:38:57,644 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:38:57,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:57,718 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:38:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:38:57,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:38:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949454268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:38:57,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:38:57,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-30 19:38:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679064914] [2023-08-30 19:38:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:38:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:38:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:38:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:38:57,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-30 19:38:57,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 114 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:57,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:57,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-30 19:38:57,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:58,689 INFO L130 PetriNetUnfolder]: 2832/5854 cut-off events. [2023-08-30 19:38:58,689 INFO L131 PetriNetUnfolder]: For 18207/18232 co-relation queries the response was YES. [2023-08-30 19:38:58,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 5854 events. 2832/5854 cut-off events. For 18207/18232 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 47264 event pairs, 1665 based on Foata normal form. 9/5623 useless extension candidates. Maximal degree in co-relation 23083. Up to 3393 conditions per place. [2023-08-30 19:38:58,715 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 81 selfloop transitions, 16 changer transitions 22/147 dead transitions. [2023-08-30 19:38:58,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 147 transitions, 1355 flow [2023-08-30 19:38:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:38:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:38:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1283 transitions. [2023-08-30 19:38:58,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435949711179069 [2023-08-30 19:38:58,717 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1283 transitions. [2023-08-30 19:38:58,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1283 transitions. [2023-08-30 19:38:58,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:58,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1283 transitions. [2023-08-30 19:38:58,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.55555555555554) internal successors, (1283), 9 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:58,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:58,720 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:58,720 INFO L175 Difference]: Start difference. First operand has 155 places, 114 transitions, 961 flow. Second operand 9 states and 1283 transitions. [2023-08-30 19:38:58,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 147 transitions, 1355 flow [2023-08-30 19:38:58,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 147 transitions, 1303 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-30 19:38:58,773 INFO L231 Difference]: Finished difference. Result has 156 places, 113 transitions, 941 flow [2023-08-30 19:38:58,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=941, PETRI_PLACES=156, PETRI_TRANSITIONS=113} [2023-08-30 19:38:58,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2023-08-30 19:38:58,774 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 113 transitions, 941 flow [2023-08-30 19:38:58,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:38:58,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:58,774 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:38:58,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:58,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:58,980 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)] === [2023-08-30 19:38:58,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -355322796, now seen corresponding path program 25 times [2023-08-30 19:38:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542488214] [2023-08-30 19:38:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:38:59,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:59,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542488214] [2023-08-30 19:38:59,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542488214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421177285] [2023-08-30 19:38:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:38:59,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:59,823 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) [2023-08-30 19:38:59,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:38:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:59,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 19:38:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:00,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:00,053 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:00,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:00,121 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:39:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:00,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:00,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:00,270 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-30 19:39:00,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:00,289 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-30 19:39:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:00,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421177285] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:00,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:39:00,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 26 [2023-08-30 19:39:00,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357350772] [2023-08-30 19:39:00,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:00,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:39:00,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:39:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=678, Unknown=4, NotChecked=0, Total=756 [2023-08-30 19:39:02,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:39:04,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:39:06,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:39:06,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2023-08-30 19:39:06,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 113 transitions, 941 flow. Second operand has 10 states, 10 states have (on average 127.8) internal successors, (1278), 10 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:06,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:06,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2023-08-30 19:39:06,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:09,824 INFO L130 PetriNetUnfolder]: 2808/5746 cut-off events. [2023-08-30 19:39:09,825 INFO L131 PetriNetUnfolder]: For 17298/17323 co-relation queries the response was YES. [2023-08-30 19:39:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22335 conditions, 5746 events. 2808/5746 cut-off events. For 17298/17323 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46412 event pairs, 1641 based on Foata normal form. 9/5515 useless extension candidates. Maximal degree in co-relation 22288. Up to 3474 conditions per place. [2023-08-30 19:39:09,852 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 62 selfloop transitions, 9 changer transitions 50/143 dead transitions. [2023-08-30 19:39:09,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 143 transitions, 1293 flow [2023-08-30 19:39:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:39:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:39:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1192 transitions. [2023-08-30 19:39:09,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050288820931023 [2023-08-30 19:39:09,853 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1192 transitions. [2023-08-30 19:39:09,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1192 transitions. [2023-08-30 19:39:09,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:09,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1192 transitions. [2023-08-30 19:39:09,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.44444444444446) internal successors, (1192), 9 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:09,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:09,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:09,856 INFO L175 Difference]: Start difference. First operand has 156 places, 113 transitions, 941 flow. Second operand 9 states and 1192 transitions. [2023-08-30 19:39:09,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 143 transitions, 1293 flow [2023-08-30 19:39:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 143 transitions, 1234 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-30 19:39:09,906 INFO L231 Difference]: Finished difference. Result has 154 places, 91 transitions, 733 flow [2023-08-30 19:39:09,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=733, PETRI_PLACES=154, PETRI_TRANSITIONS=91} [2023-08-30 19:39:09,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2023-08-30 19:39:09,907 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 91 transitions, 733 flow [2023-08-30 19:39:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 127.8) internal successors, (1278), 10 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:09,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:09,908 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:39:09,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:10,109 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,SelfDestructingSolverStorable25 [2023-08-30 19:39:10,110 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:10,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash -751429968, now seen corresponding path program 26 times [2023-08-30 19:39:10,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:10,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769997720] [2023-08-30 19:39:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:10,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:10,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769997720] [2023-08-30 19:39:10,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769997720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:10,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909416854] [2023-08-30 19:39:10,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:10,908 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) [2023-08-30 19:39:10,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:39:11,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:39:11,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 19:39:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:11,153 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:11,198 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:11,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:11,294 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:39:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:11,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:39:11,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909416854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:11,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:39:11,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-30 19:39:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055122112] [2023-08-30 19:39:11,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:39:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:39:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:39:11,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-30 19:39:11,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 91 transitions, 733 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:11,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:11,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-30 19:39:11,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:12,315 INFO L130 PetriNetUnfolder]: 2277/4693 cut-off events. [2023-08-30 19:39:12,315 INFO L131 PetriNetUnfolder]: For 14730/14755 co-relation queries the response was YES. [2023-08-30 19:39:12,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18156 conditions, 4693 events. 2277/4693 cut-off events. For 14730/14755 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35854 event pairs, 860 based on Foata normal form. 9/4526 useless extension candidates. Maximal degree in co-relation 18112. Up to 2334 conditions per place. [2023-08-30 19:39:12,331 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 73 selfloop transitions, 23 changer transitions 24/142 dead transitions. [2023-08-30 19:39:12,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 1226 flow [2023-08-30 19:39:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:39:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:39:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1405 transitions. [2023-08-30 19:39:12,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42966360856269115 [2023-08-30 19:39:12,333 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1405 transitions. [2023-08-30 19:39:12,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1405 transitions. [2023-08-30 19:39:12,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:12,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1405 transitions. [2023-08-30 19:39:12,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.5) internal successors, (1405), 10 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,338 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,338 INFO L175 Difference]: Start difference. First operand has 154 places, 91 transitions, 733 flow. Second operand 10 states and 1405 transitions. [2023-08-30 19:39:12,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 1226 flow [2023-08-30 19:39:12,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 142 transitions, 1089 flow, removed 11 selfloop flow, removed 19 redundant places. [2023-08-30 19:39:12,388 INFO L231 Difference]: Finished difference. Result has 131 places, 95 transitions, 719 flow [2023-08-30 19:39:12,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=719, PETRI_PLACES=131, PETRI_TRANSITIONS=95} [2023-08-30 19:39:12,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2023-08-30 19:39:12,389 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 95 transitions, 719 flow [2023-08-30 19:39:12,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:12,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:12,390 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:39:12,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:12,596 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,SelfDestructingSolverStorable26 [2023-08-30 19:39:12,596 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:12,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1758720650, now seen corresponding path program 27 times [2023-08-30 19:39:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:12,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796416628] [2023-08-30 19:39:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796416628] [2023-08-30 19:39:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796416628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276751458] [2023-08-30 19:39:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:39:13,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:13,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:13,481 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) [2023-08-30 19:39:13,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:39:13,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:39:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 19:39:13,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:13,760 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:13,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:13,806 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:13,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:13,881 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:39:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:13,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:39:13,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276751458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:13,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:39:13,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-30 19:39:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380098041] [2023-08-30 19:39:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:39:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:39:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:39:14,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-30 19:39:14,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 95 transitions, 719 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:14,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:14,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-30 19:39:14,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:14,763 INFO L130 PetriNetUnfolder]: 2235/4623 cut-off events. [2023-08-30 19:39:14,764 INFO L131 PetriNetUnfolder]: For 13786/13811 co-relation queries the response was YES. [2023-08-30 19:39:14,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17184 conditions, 4623 events. 2235/4623 cut-off events. For 13786/13811 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35047 event pairs, 795 based on Foata normal form. 13/4460 useless extension candidates. Maximal degree in co-relation 17147. Up to 2128 conditions per place. [2023-08-30 19:39:14,780 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 59 selfloop transitions, 20 changer transitions 55/145 dead transitions. [2023-08-30 19:39:14,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 145 transitions, 1187 flow [2023-08-30 19:39:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:39:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:39:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1406 transitions. [2023-08-30 19:39:14,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996941896024465 [2023-08-30 19:39:14,783 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1406 transitions. [2023-08-30 19:39:14,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1406 transitions. [2023-08-30 19:39:14,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:14,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1406 transitions. [2023-08-30 19:39:14,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.6) internal successors, (1406), 10 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:14,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:14,786 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:14,787 INFO L175 Difference]: Start difference. First operand has 131 places, 95 transitions, 719 flow. Second operand 10 states and 1406 transitions. [2023-08-30 19:39:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 145 transitions, 1187 flow [2023-08-30 19:39:14,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 145 transitions, 1131 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-30 19:39:14,828 INFO L231 Difference]: Finished difference. Result has 133 places, 67 transitions, 454 flow [2023-08-30 19:39:14,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=454, PETRI_PLACES=133, PETRI_TRANSITIONS=67} [2023-08-30 19:39:14,829 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2023-08-30 19:39:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 67 transitions, 454 flow [2023-08-30 19:39:14,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:14,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:14,830 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 19:39:14,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:15,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:39:15,034 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:39:15,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1522566620, now seen corresponding path program 28 times [2023-08-30 19:39:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855187508] [2023-08-30 19:39:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:15,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855187508] [2023-08-30 19:39:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855187508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417530853] [2023-08-30 19:39:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:39:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:15,751 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) [2023-08-30 19:39:15,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:39:15,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:39:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 19:39:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:16,036 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:39:16,090 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-08-30 19:39:16,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:39:16,182 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-30 19:39:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:16,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:39:16,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417530853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:16,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:39:16,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-08-30 19:39:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677536763] [2023-08-30 19:39:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:16,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:39:16,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:39:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:39:16,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-30 19:39:16,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 67 transitions, 454 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:16,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:16,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-30 19:39:16,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:16,833 INFO L130 PetriNetUnfolder]: 561/1175 cut-off events. [2023-08-30 19:39:16,833 INFO L131 PetriNetUnfolder]: For 6150/6150 co-relation queries the response was YES. [2023-08-30 19:39:16,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 1175 events. 561/1175 cut-off events. For 6150/6150 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6449 event pairs, 164 based on Foata normal form. 6/1127 useless extension candidates. Maximal degree in co-relation 4680. Up to 342 conditions per place. [2023-08-30 19:39:16,838 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-30 19:39:16,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 93 transitions, 723 flow [2023-08-30 19:39:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:39:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:39:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-08-30 19:39:16,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42698776758409784 [2023-08-30 19:39:16,840 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-08-30 19:39:16,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-08-30 19:39:16,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:16,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-08-30 19:39:16,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:16,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:16,845 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:16,845 INFO L175 Difference]: Start difference. First operand has 133 places, 67 transitions, 454 flow. Second operand 8 states and 1117 transitions. [2023-08-30 19:39:16,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 93 transitions, 723 flow [2023-08-30 19:39:16,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 93 transitions, 553 flow, removed 22 selfloop flow, removed 32 redundant places. [2023-08-30 19:39:16,854 INFO L231 Difference]: Finished difference. Result has 88 places, 0 transitions, 0 flow [2023-08-30 19:39:16,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=88, PETRI_TRANSITIONS=0} [2023-08-30 19:39:16,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2023-08-30 19:39:16,855 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 0 transitions, 0 flow [2023-08-30 19:39:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:16,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 19:39:16,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 19:39:16,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 19:39:16,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 19:39:16,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 19:39:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:39:17,067 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1] [2023-08-30 19:39:17,069 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 19:39:17,069 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 19:39:17,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 07:39:17 BasicIcfg [2023-08-30 19:39:17,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 19:39:17,071 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 19:39:17,071 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 19:39:17,072 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 19:39:17,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:36:53" (3/4) ... [2023-08-30 19:39:17,074 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 19:39:17,078 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 19:39:17,078 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 19:39:17,078 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-08-30 19:39:17,083 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2023-08-30 19:39:17,083 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 19:39:17,083 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 19:39:17,084 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 19:39:17,130 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 19:39:17,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 19:39:17,131 INFO L158 Benchmark]: Toolchain (without parser) took 144408.97ms. Allocated memory was 75.5MB in the beginning and 10.7GB in the end (delta: 10.6GB). Free memory was 53.7MB in the beginning and 7.4GB in the end (delta: -7.3GB). Peak memory consumption was 3.3GB. Max. memory is 16.1GB. [2023-08-30 19:39:17,132 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 19:39:17,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.65ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 41.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 19:39:17,136 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.24ms. Allocated memory is still 75.5MB. Free memory was 41.1MB in the beginning and 38.7MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 19:39:17,136 INFO L158 Benchmark]: Boogie Preprocessor took 53.85ms. Allocated memory is still 75.5MB. Free memory was 38.7MB in the beginning and 37.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 19:39:17,137 INFO L158 Benchmark]: RCFGBuilder took 636.89ms. Allocated memory is still 75.5MB. Free memory was 36.9MB in the beginning and 53.5MB in the end (delta: -16.6MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2023-08-30 19:39:17,137 INFO L158 Benchmark]: TraceAbstraction took 143249.11ms. Allocated memory was 75.5MB in the beginning and 10.7GB in the end (delta: 10.6GB). Free memory was 53.1MB in the beginning and 7.4GB in the end (delta: -7.3GB). Peak memory consumption was 3.3GB. Max. memory is 16.1GB. [2023-08-30 19:39:17,138 INFO L158 Benchmark]: Witness Printer took 59.67ms. Allocated memory is still 10.7GB. Free memory was 7.4GB in the beginning and 7.4GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 19:39:17,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.65ms. Allocated memory is still 75.5MB. Free memory was 53.7MB in the beginning and 41.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.24ms. Allocated memory is still 75.5MB. Free memory was 41.1MB in the beginning and 38.7MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.85ms. Allocated memory is still 75.5MB. Free memory was 38.7MB in the beginning and 37.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 636.89ms. Allocated memory is still 75.5MB. Free memory was 36.9MB in the beginning and 53.5MB in the end (delta: -16.6MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * TraceAbstraction took 143249.11ms. Allocated memory was 75.5MB in the beginning and 10.7GB in the end (delta: 10.6GB). Free memory was 53.1MB in the beginning and 7.4GB in the end (delta: -7.3GB). Peak memory consumption was 3.3GB. Max. memory is 16.1GB. * Witness Printer took 59.67ms. Allocated memory is still 10.7GB. Free memory was 7.4GB in the beginning and 7.4GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 170 PlacesBefore, 45 PlacesAfterwards, 167 TransitionsBefore, 36 TransitionsAfterwards, 1266 CoEnabledTransitionPairs, 7 FixpointIterations, 101 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 0 ConcurrentYvCompositions, 6 ChoiceCompositions, 147 TotalNumberOfCompositions, 7223 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3209, independent: 2894, independent conditional: 0, independent unconditional: 2894, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 654, independent: 631, independent conditional: 0, independent unconditional: 631, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3209, independent: 2263, independent conditional: 0, independent unconditional: 2263, dependent: 292, dependent conditional: 0, dependent unconditional: 292, unknown: 654, unknown conditional: 0, unknown unconditional: 654] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 172, Positive conditional cache size: 0, Positive unconditional cache size: 172, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 161]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 209 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 143.1s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 105.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 44 mSolverCounterUnknown, 5541 SdHoareTripleChecker+Valid, 38.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5038 mSDsluCounter, 2918 SdHoareTripleChecker+Invalid, 36.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 381 IncrementalHoareTripleChecker+Unchecked, 2806 mSDsCounter, 155 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19551 IncrementalHoareTripleChecker+Invalid, 20131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 155 mSolverCounterUnsat, 112 mSDtfsCounter, 19551 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1245 GetRequests, 703 SyntacticMatches, 6 SemanticMatches, 536 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 31.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2321occurred in iteration=14, InterpolantAutomatonStates: 277, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 24.0s InterpolantComputationTime, 1729 NumberOfCodeBlocks, 1691 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1861 ConstructedInterpolants, 78 QuantifiedInterpolants, 26240 SizeOfPredicates, 225 NumberOfNonLiveVariables, 4752 ConjunctsInSsa, 430 ConjunctsInUnsatCore, 52 InterpolantComputations, 27 PerfectInterpolantSequences, 73/135 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 19:39:17,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE