./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:59:10,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:59:10,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:59:10,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:59:10,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:59:10,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:59:10,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:59:10,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:59:10,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:59:10,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:59:10,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:59:10,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:59:10,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:59:10,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:59:10,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:59:10,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:59:10,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:59:10,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:59:10,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:59:10,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:59:10,975 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:59:10,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:59:10,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:59:10,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:59:10,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:59:10,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:59:10,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:59:10,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:59:10,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:59:10,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:59:10,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:59:10,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:59:10,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:59:10,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:59:10,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:59:10,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:59:10,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:59:10,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:59:10,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:59:10,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:59:10,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:59:10,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:59:10,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:59:11,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:59:11,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:59:11,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:59:11,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:59:11,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:59:11,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:59:11,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:59:11,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:59:11,017 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:59:11,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:59:11,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:59:11,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:59:11,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:59:11,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:59:11,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:59:11,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:59:11,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:59:11,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:59:11,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:59:11,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:59:11,021 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:59:11,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:59:11,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:59:11,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-07-12 09:59:11,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:59:11,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:59:11,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:59:11,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:59:11,208 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:59:11,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2022-07-12 09:59:11,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e0860bf/8c1982fbc18e40ed8705f824178a4500/FLAG36da81ff5 [2022-07-12 09:59:11,699 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:59:11,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2022-07-12 09:59:11,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e0860bf/8c1982fbc18e40ed8705f824178a4500/FLAG36da81ff5 [2022-07-12 09:59:11,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e0860bf/8c1982fbc18e40ed8705f824178a4500 [2022-07-12 09:59:11,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:59:11,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:59:11,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:59:11,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:59:11,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:59:11,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:59:11" (1/1) ... [2022-07-12 09:59:11,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bf6e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:11, skipping insertion in model container [2022-07-12 09:59:11,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:59:11" (1/1) ... [2022-07-12 09:59:11,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:59:11,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:59:12,052 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-07-12 09:59:12,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:59:12,075 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:59:12,113 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-07-12 09:59:12,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:59:12,169 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:59:12,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12 WrapperNode [2022-07-12 09:59:12,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:59:12,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:59:12,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:59:12,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:59:12,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,227 INFO L137 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-07-12 09:59:12,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:59:12,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:59:12,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:59:12,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:59:12,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:59:12,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:59:12,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:59:12,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:59:12,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (1/1) ... [2022-07-12 09:59:12,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:59:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:12,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 09:59:12,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 09:59:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-12 09:59:12,337 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-12 09:59:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-12 09:59:12,337 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:59:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:59:12,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:59:12,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:59:12,340 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 09:59:12,427 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:59:12,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:59:12,606 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:59:12,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:59:12,613 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:59:12,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:59:12 BoogieIcfgContainer [2022-07-12 09:59:12,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:59:12,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:59:12,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:59:12,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:59:12,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:59:11" (1/3) ... [2022-07-12 09:59:12,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0ad65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:59:12, skipping insertion in model container [2022-07-12 09:59:12,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:59:12" (2/3) ... [2022-07-12 09:59:12,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0ad65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:59:12, skipping insertion in model container [2022-07-12 09:59:12,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:59:12" (3/3) ... [2022-07-12 09:59:12,621 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-07-12 09:59:12,625 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 09:59:12,631 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:59:12,631 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:59:12,631 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 09:59:12,683 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 09:59:12,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 360 flow [2022-07-12 09:59:12,763 INFO L129 PetriNetUnfolder]: 10/170 cut-off events. [2022-07-12 09:59:12,763 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 09:59:12,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 10/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 416 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-07-12 09:59:12,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 172 transitions, 360 flow [2022-07-12 09:59:12,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 329 flow [2022-07-12 09:59:12,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:59:12,789 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fddb79d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65c8aa7 [2022-07-12 09:59:12,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 09:59:12,810 INFO L129 PetriNetUnfolder]: 5/129 cut-off events. [2022-07-12 09:59:12,810 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 09:59:12,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:12,811 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:12,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2105074172, now seen corresponding path program 1 times [2022-07-12 09:59:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:12,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829385098] [2022-07-12 09:59:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829385098] [2022-07-12 09:59:13,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829385098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:13,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:13,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:59:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094779703] [2022-07-12 09:59:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:59:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:59:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:59:13,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-07-12 09:59:13,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:13,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-07-12 09:59:13,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:13,254 INFO L129 PetriNetUnfolder]: 88/699 cut-off events. [2022-07-12 09:59:13,254 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-12 09:59:13,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 699 events. 88/699 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3098 event pairs, 32 based on Foata normal form. 69/702 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-07-12 09:59:13,263 INFO L132 encePairwiseOnDemand]: 162/172 looper letters, 20 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2022-07-12 09:59:13,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 377 flow [2022-07-12 09:59:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:59:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:59:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-07-12 09:59:13,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9282945736434108 [2022-07-12 09:59:13,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-07-12 09:59:13,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-07-12 09:59:13,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:13,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-07-12 09:59:13,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,287 INFO L186 Difference]: Start difference. First operand has 157 places, 160 transitions, 329 flow. Second operand 3 states and 479 transitions. [2022-07-12 09:59:13,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 377 flow [2022-07-12 09:59:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 09:59:13,292 INFO L242 Difference]: Finished difference. Result has 153 places, 152 transitions, 323 flow [2022-07-12 09:59:13,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2022-07-12 09:59:13,296 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2022-07-12 09:59:13,297 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 323 flow [2022-07-12 09:59:13,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:13,297 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:59:13,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212847, now seen corresponding path program 1 times [2022-07-12 09:59:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144855035] [2022-07-12 09:59:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:13,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:13,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:13,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144855035] [2022-07-12 09:59:13,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144855035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:13,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:13,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:59:13,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127829718] [2022-07-12 09:59:13,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:13,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:59:13,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:59:13,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:59:13,423 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 172 [2022-07-12 09:59:13,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:13,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 172 [2022-07-12 09:59:13,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:13,531 INFO L129 PetriNetUnfolder]: 34/590 cut-off events. [2022-07-12 09:59:13,532 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 09:59:13,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 590 events. 34/590 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2047 event pairs, 11 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-07-12 09:59:13,536 INFO L132 encePairwiseOnDemand]: 167/172 looper letters, 16 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2022-07-12 09:59:13,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 384 flow [2022-07-12 09:59:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:59:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 09:59:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-07-12 09:59:13,540 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9142441860465116 [2022-07-12 09:59:13,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-07-12 09:59:13,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-07-12 09:59:13,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:13,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-07-12 09:59:13,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,545 INFO L186 Difference]: Start difference. First operand has 153 places, 152 transitions, 323 flow. Second operand 4 states and 629 transitions. [2022-07-12 09:59:13,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 384 flow [2022-07-12 09:59:13,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:59:13,551 INFO L242 Difference]: Finished difference. Result has 157 places, 155 transitions, 348 flow [2022-07-12 09:59:13,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=155} [2022-07-12 09:59:13,553 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-07-12 09:59:13,553 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 155 transitions, 348 flow [2022-07-12 09:59:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,554 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:13,554 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:13,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:59:13,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1628458080, now seen corresponding path program 1 times [2022-07-12 09:59:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369002361] [2022-07-12 09:59:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:13,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369002361] [2022-07-12 09:59:13,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369002361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:13,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:13,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:59:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924598292] [2022-07-12 09:59:13,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:59:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:59:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:59:13,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-07-12 09:59:13,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 155 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:13,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-07-12 09:59:13,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:13,831 INFO L129 PetriNetUnfolder]: 127/1267 cut-off events. [2022-07-12 09:59:13,831 INFO L130 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-07-12 09:59:13,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 1267 events. 127/1267 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6947 event pairs, 33 based on Foata normal form. 12/1205 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-07-12 09:59:13,839 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 25 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2022-07-12 09:59:13,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 439 flow [2022-07-12 09:59:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:59:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:59:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-07-12 09:59:13,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9186046511627907 [2022-07-12 09:59:13,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-07-12 09:59:13,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-07-12 09:59:13,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:13,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-07-12 09:59:13,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,844 INFO L186 Difference]: Start difference. First operand has 157 places, 155 transitions, 348 flow. Second operand 3 states and 474 transitions. [2022-07-12 09:59:13,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 439 flow [2022-07-12 09:59:13,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 167 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:59:13,850 INFO L242 Difference]: Finished difference. Result has 160 places, 159 transitions, 388 flow [2022-07-12 09:59:13,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-07-12 09:59:13,852 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 3 predicate places. [2022-07-12 09:59:13,853 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 388 flow [2022-07-12 09:59:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:13,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:13,853 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:13,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:59:13,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash 585023441, now seen corresponding path program 1 times [2022-07-12 09:59:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:13,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726958586] [2022-07-12 09:59:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726958586] [2022-07-12 09:59:13,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726958586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430010368] [2022-07-12 09:59:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:13,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:13,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:13,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:59:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 09:59:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:14,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:14,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430010368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:14,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:14,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 09:59:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982273670] [2022-07-12 09:59:14,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:14,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:59:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:59:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:59:14,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-12 09:59:14,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:14,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:14,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-12 09:59:14,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:14,634 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([465] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][178], [Black: 174#(= ~top~0 0), 113#L945-2true, 30#L1008-1true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 186#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 230#(<= ~top~0 0), Black: 188#(<= 1 ~top~0)]) [2022-07-12 09:59:14,634 INFO L384 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-07-12 09:59:14,636 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-07-12 09:59:14,636 INFO L387 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-07-12 09:59:14,637 INFO L387 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-07-12 09:59:14,637 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([464] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][179], [Black: 174#(= ~top~0 0), 72#L1010true, 113#L945-2true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 192#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 188#(<= 1 ~top~0), Black: 186#true]) [2022-07-12 09:59:14,637 INFO L384 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-07-12 09:59:14,637 INFO L387 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-07-12 09:59:14,638 INFO L387 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-07-12 09:59:14,638 INFO L387 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-07-12 09:59:14,684 INFO L129 PetriNetUnfolder]: 387/2990 cut-off events. [2022-07-12 09:59:14,689 INFO L130 PetriNetUnfolder]: For 1008/1064 co-relation queries the response was YES. [2022-07-12 09:59:14,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 2990 events. 387/2990 cut-off events. For 1008/1064 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21582 event pairs, 43 based on Foata normal form. 40/2871 useless extension candidates. Maximal degree in co-relation 3934. Up to 300 conditions per place. [2022-07-12 09:59:14,722 INFO L132 encePairwiseOnDemand]: 163/172 looper letters, 86 selfloop transitions, 46 changer transitions 1/269 dead transitions. [2022-07-12 09:59:14,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 269 transitions, 1070 flow [2022-07-12 09:59:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 09:59:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 09:59:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2759 transitions. [2022-07-12 09:59:14,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8911498708010336 [2022-07-12 09:59:14,726 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2759 transitions. [2022-07-12 09:59:14,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2759 transitions. [2022-07-12 09:59:14,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:14,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2759 transitions. [2022-07-12 09:59:14,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.27777777777777) internal successors, (2759), 18 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:14,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:14,737 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:14,737 INFO L186 Difference]: Start difference. First operand has 160 places, 159 transitions, 388 flow. Second operand 18 states and 2759 transitions. [2022-07-12 09:59:14,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 269 transitions, 1070 flow [2022-07-12 09:59:14,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 269 transitions, 1008 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-12 09:59:14,745 INFO L242 Difference]: Finished difference. Result has 181 places, 214 transitions, 759 flow [2022-07-12 09:59:14,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=759, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2022-07-12 09:59:14,746 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 24 predicate places. [2022-07-12 09:59:14,746 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 759 flow [2022-07-12 09:59:14,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:14,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:14,747 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:14,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:59:14,964 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 [2022-07-12 09:59:14,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash -240965741, now seen corresponding path program 1 times [2022-07-12 09:59:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225890984] [2022-07-12 09:59:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225890984] [2022-07-12 09:59:15,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225890984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:15,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:15,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:59:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933969029] [2022-07-12 09:59:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:15,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:59:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:59:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:59:15,060 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-07-12 09:59:15,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 759 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:15,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-07-12 09:59:15,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:15,172 INFO L129 PetriNetUnfolder]: 53/1113 cut-off events. [2022-07-12 09:59:15,172 INFO L130 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-07-12 09:59:15,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1113 events. 53/1113 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4883 event pairs, 9 based on Foata normal form. 17/1088 useless extension candidates. Maximal degree in co-relation 997. Up to 49 conditions per place. [2022-07-12 09:59:15,176 INFO L132 encePairwiseOnDemand]: 168/172 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-07-12 09:59:15,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 536 flow [2022-07-12 09:59:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:59:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:59:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-07-12 09:59:15,178 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2022-07-12 09:59:15,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-07-12 09:59:15,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-07-12 09:59:15,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:15,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-07-12 09:59:15,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,180 INFO L186 Difference]: Start difference. First operand has 181 places, 214 transitions, 759 flow. Second operand 3 states and 468 transitions. [2022-07-12 09:59:15,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 536 flow [2022-07-12 09:59:15,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-12 09:59:15,184 INFO L242 Difference]: Finished difference. Result has 171 places, 171 transitions, 483 flow [2022-07-12 09:59:15,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2022-07-12 09:59:15,185 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 14 predicate places. [2022-07-12 09:59:15,185 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 483 flow [2022-07-12 09:59:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,185 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:15,185 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:59:15,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1489789719, now seen corresponding path program 1 times [2022-07-12 09:59:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137829936] [2022-07-12 09:59:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:15,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137829936] [2022-07-12 09:59:15,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137829936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:15,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:15,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-12 09:59:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932144675] [2022-07-12 09:59:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 09:59:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 09:59:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-07-12 09:59:15,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-07-12 09:59:15,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 483 flow. Second operand has 25 states, 25 states have (on average 99.28) internal successors, (2482), 25 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:15,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:15,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-07-12 09:59:15,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:17,402 INFO L129 PetriNetUnfolder]: 1109/4447 cut-off events. [2022-07-12 09:59:17,403 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-12 09:59:17,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 4447 events. 1109/4447 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33104 event pairs, 163 based on Foata normal form. 0/4295 useless extension candidates. Maximal degree in co-relation 4749. Up to 1468 conditions per place. [2022-07-12 09:59:17,423 INFO L132 encePairwiseOnDemand]: 138/172 looper letters, 254 selfloop transitions, 42 changer transitions 2/384 dead transitions. [2022-07-12 09:59:17,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 384 transitions, 1688 flow [2022-07-12 09:59:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 09:59:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-12 09:59:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3271 transitions. [2022-07-12 09:59:17,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6134658664666166 [2022-07-12 09:59:17,430 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3271 transitions. [2022-07-12 09:59:17,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3271 transitions. [2022-07-12 09:59:17,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:17,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3271 transitions. [2022-07-12 09:59:17,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.51612903225806) internal successors, (3271), 31 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:17,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:17,442 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:17,443 INFO L186 Difference]: Start difference. First operand has 171 places, 171 transitions, 483 flow. Second operand 31 states and 3271 transitions. [2022-07-12 09:59:17,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 384 transitions, 1688 flow [2022-07-12 09:59:17,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 384 transitions, 1684 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:59:17,450 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 797 flow [2022-07-12 09:59:17,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=797, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-07-12 09:59:17,451 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 70 predicate places. [2022-07-12 09:59:17,451 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 797 flow [2022-07-12 09:59:17,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 99.28) internal successors, (2482), 25 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:17,452 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:17,452 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:59:17,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1146657715, now seen corresponding path program 2 times [2022-07-12 09:59:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613791022] [2022-07-12 09:59:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613791022] [2022-07-12 09:59:18,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613791022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:18,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:18,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-12 09:59:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527084089] [2022-07-12 09:59:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 09:59:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 09:59:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-12 09:59:18,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-07-12 09:59:18,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 797 flow. Second operand has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:18,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:18,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-07-12 09:59:18,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:20,488 INFO L129 PetriNetUnfolder]: 1483/6023 cut-off events. [2022-07-12 09:59:20,489 INFO L130 PetriNetUnfolder]: For 2906/2906 co-relation queries the response was YES. [2022-07-12 09:59:20,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13060 conditions, 6023 events. 1483/6023 cut-off events. For 2906/2906 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 48983 event pairs, 307 based on Foata normal form. 4/5913 useless extension candidates. Maximal degree in co-relation 7868. Up to 1499 conditions per place. [2022-07-12 09:59:20,523 INFO L132 encePairwiseOnDemand]: 136/172 looper letters, 261 selfloop transitions, 60 changer transitions 2/399 dead transitions. [2022-07-12 09:59:20,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 399 transitions, 2193 flow [2022-07-12 09:59:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 09:59:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 09:59:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2920 transitions. [2022-07-12 09:59:20,528 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5305232558139535 [2022-07-12 09:59:20,528 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2920 transitions. [2022-07-12 09:59:20,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2920 transitions. [2022-07-12 09:59:20,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:20,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2920 transitions. [2022-07-12 09:59:20,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.25) internal successors, (2920), 32 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:20,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 172.0) internal successors, (5676), 33 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:20,539 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 172.0) internal successors, (5676), 33 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:20,540 INFO L186 Difference]: Start difference. First operand has 227 places, 209 transitions, 797 flow. Second operand 32 states and 2920 transitions. [2022-07-12 09:59:20,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 399 transitions, 2193 flow [2022-07-12 09:59:20,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 399 transitions, 2189 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 09:59:20,568 INFO L242 Difference]: Finished difference. Result has 271 places, 228 transitions, 1115 flow [2022-07-12 09:59:20,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1115, PETRI_PLACES=271, PETRI_TRANSITIONS=228} [2022-07-12 09:59:20,569 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 114 predicate places. [2022-07-12 09:59:20,569 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 228 transitions, 1115 flow [2022-07-12 09:59:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:20,570 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:20,570 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:20,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:59:20,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash -715293043, now seen corresponding path program 3 times [2022-07-12 09:59:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:20,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619277455] [2022-07-12 09:59:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619277455] [2022-07-12 09:59:21,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619277455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:59:21,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:59:21,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-12 09:59:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412132074] [2022-07-12 09:59:21,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 09:59:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 09:59:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-12 09:59:21,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-07-12 09:59:21,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 228 transitions, 1115 flow. Second operand has 28 states, 28 states have (on average 86.39285714285714) internal successors, (2419), 28 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:21,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:21,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-07-12 09:59:21,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:23,852 INFO L129 PetriNetUnfolder]: 1881/7744 cut-off events. [2022-07-12 09:59:23,852 INFO L130 PetriNetUnfolder]: For 4966/4969 co-relation queries the response was YES. [2022-07-12 09:59:23,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17543 conditions, 7744 events. 1881/7744 cut-off events. For 4966/4969 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 68367 event pairs, 146 based on Foata normal form. 5/7587 useless extension candidates. Maximal degree in co-relation 10916. Up to 1429 conditions per place. [2022-07-12 09:59:23,911 INFO L132 encePairwiseOnDemand]: 135/172 looper letters, 284 selfloop transitions, 81 changer transitions 3/444 dead transitions. [2022-07-12 09:59:23,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 444 transitions, 2749 flow [2022-07-12 09:59:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 09:59:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-12 09:59:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3232 transitions. [2022-07-12 09:59:23,919 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5368770764119601 [2022-07-12 09:59:23,919 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3232 transitions. [2022-07-12 09:59:23,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3232 transitions. [2022-07-12 09:59:23,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:23,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3232 transitions. [2022-07-12 09:59:23,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 92.34285714285714) internal successors, (3232), 35 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:23,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:23,932 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:23,933 INFO L186 Difference]: Start difference. First operand has 271 places, 228 transitions, 1115 flow. Second operand 35 states and 3232 transitions. [2022-07-12 09:59:23,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 444 transitions, 2749 flow [2022-07-12 09:59:23,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 444 transitions, 2655 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-12 09:59:23,953 INFO L242 Difference]: Finished difference. Result has 306 places, 249 transitions, 1481 flow [2022-07-12 09:59:23,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1481, PETRI_PLACES=306, PETRI_TRANSITIONS=249} [2022-07-12 09:59:23,954 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 149 predicate places. [2022-07-12 09:59:23,954 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 249 transitions, 1481 flow [2022-07-12 09:59:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.39285714285714) internal successors, (2419), 28 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:23,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:23,956 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:23,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:59:23,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 717635681, now seen corresponding path program 1 times [2022-07-12 09:59:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:23,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303965113] [2022-07-12 09:59:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303965113] [2022-07-12 09:59:24,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303965113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089728559] [2022-07-12 09:59:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:24,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:24,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:24,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:24,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:59:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:59:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 09:59:24,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 09:59:24,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089728559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:24,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:24,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-07-12 09:59:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100854687] [2022-07-12 09:59:24,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:24,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 09:59:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 09:59:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:59:24,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 172 [2022-07-12 09:59:24,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 249 transitions, 1481 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:24,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:24,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 172 [2022-07-12 09:59:24,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:24,993 INFO L129 PetriNetUnfolder]: 266/3674 cut-off events. [2022-07-12 09:59:24,993 INFO L130 PetriNetUnfolder]: For 3249/3253 co-relation queries the response was YES. [2022-07-12 09:59:25,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7392 conditions, 3674 events. 266/3674 cut-off events. For 3249/3253 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 27724 event pairs, 51 based on Foata normal form. 19/3606 useless extension candidates. Maximal degree in co-relation 5500. Up to 153 conditions per place. [2022-07-12 09:59:25,023 INFO L132 encePairwiseOnDemand]: 161/172 looper letters, 53 selfloop transitions, 49 changer transitions 0/288 dead transitions. [2022-07-12 09:59:25,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 288 transitions, 1810 flow [2022-07-12 09:59:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 09:59:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 09:59:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2665 transitions. [2022-07-12 09:59:25,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8607881136950905 [2022-07-12 09:59:25,026 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2665 transitions. [2022-07-12 09:59:25,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2665 transitions. [2022-07-12 09:59:25,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:25,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2665 transitions. [2022-07-12 09:59:25,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.05555555555554) internal successors, (2665), 18 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:25,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:25,033 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:25,033 INFO L186 Difference]: Start difference. First operand has 306 places, 249 transitions, 1481 flow. Second operand 18 states and 2665 transitions. [2022-07-12 09:59:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 288 transitions, 1810 flow [2022-07-12 09:59:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 288 transitions, 1695 flow, removed 36 selfloop flow, removed 16 redundant places. [2022-07-12 09:59:25,052 INFO L242 Difference]: Finished difference. Result has 311 places, 257 transitions, 1531 flow [2022-07-12 09:59:25,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1531, PETRI_PLACES=311, PETRI_TRANSITIONS=257} [2022-07-12 09:59:25,053 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 154 predicate places. [2022-07-12 09:59:25,053 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 257 transitions, 1531 flow [2022-07-12 09:59:25,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:25,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:25,054 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:25,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 09:59:25,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 09:59:25,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1173637730, now seen corresponding path program 1 times [2022-07-12 09:59:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:25,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092165891] [2022-07-12 09:59:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:25,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:25,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092165891] [2022-07-12 09:59:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092165891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508588692] [2022-07-12 09:59:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:25,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:25,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:25,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 09:59:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 09:59:25,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:26,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2022-07-12 09:59:27,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-12 09:59:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:27,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:28,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-07-12 09:59:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 09:59:28,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508588692] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:28,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:59:28,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-07-12 09:59:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950408300] [2022-07-12 09:59:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:59:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 09:59:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 09:59:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 09:59:28,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-07-12 09:59:28,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 257 transitions, 1531 flow. Second operand has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:28,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:28,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-07-12 09:59:28,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:59:35,005 INFO L129 PetriNetUnfolder]: 2699/10934 cut-off events. [2022-07-12 09:59:35,005 INFO L130 PetriNetUnfolder]: For 9667/9670 co-relation queries the response was YES. [2022-07-12 09:59:35,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 10934 events. 2699/10934 cut-off events. For 9667/9670 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 100667 event pairs, 453 based on Foata normal form. 13/10716 useless extension candidates. Maximal degree in co-relation 23300. Up to 1454 conditions per place. [2022-07-12 09:59:35,084 INFO L132 encePairwiseOnDemand]: 137/172 looper letters, 283 selfloop transitions, 187 changer transitions 3/559 dead transitions. [2022-07-12 09:59:35,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 559 transitions, 3975 flow [2022-07-12 09:59:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 09:59:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-12 09:59:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6726 transitions. [2022-07-12 09:59:35,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5924947145877378 [2022-07-12 09:59:35,091 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6726 transitions. [2022-07-12 09:59:35,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6726 transitions. [2022-07-12 09:59:35,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:59:35,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6726 transitions. [2022-07-12 09:59:35,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 101.9090909090909) internal successors, (6726), 66 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:35,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:35,109 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 172.0) internal successors, (11524), 67 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:35,109 INFO L186 Difference]: Start difference. First operand has 311 places, 257 transitions, 1531 flow. Second operand 66 states and 6726 transitions. [2022-07-12 09:59:35,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 559 transitions, 3975 flow [2022-07-12 09:59:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 559 transitions, 3822 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-07-12 09:59:35,144 INFO L242 Difference]: Finished difference. Result has 387 places, 379 transitions, 2819 flow [2022-07-12 09:59:35,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2819, PETRI_PLACES=387, PETRI_TRANSITIONS=379} [2022-07-12 09:59:35,145 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 230 predicate places. [2022-07-12 09:59:35,145 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 379 transitions, 2819 flow [2022-07-12 09:59:35,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:35,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:59:35,146 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:59:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 09:59:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:35,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 09:59:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:59:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash -741723670, now seen corresponding path program 2 times [2022-07-12 09:59:35,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:59:35,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101681571] [2022-07-12 09:59:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:59:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:59:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:59:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:59:36,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:59:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101681571] [2022-07-12 09:59:36,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101681571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:59:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107454674] [2022-07-12 09:59:36,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 09:59:36,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:59:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:59:36,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:59:36,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 09:59:36,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 09:59:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:59:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 09:59:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:59:36,356 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 09:59:36,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 09:59:36,364 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 09:59:36,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 09:59:37,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2022-07-12 09:59:37,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-07-12 09:59:37,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-12 09:59:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 09:59:38,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:59:38,702 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_303) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-07-12 09:59:38,716 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 09:59:38,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 30 [2022-07-12 09:59:38,724 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 09:59:38,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-07-12 09:59:38,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-12 09:59:39,693 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 09:59:39,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 09:59:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 09:59:39,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107454674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:59:39,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:59:39,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 75 [2022-07-12 09:59:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800311192] [2022-07-12 09:59:39,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:59:39,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-12 09:59:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:59:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-12 09:59:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5162, Unknown=1, NotChecked=144, Total=5550 [2022-07-12 09:59:39,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-07-12 09:59:39,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 379 transitions, 2819 flow. Second operand has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:59:39,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:59:39,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-07-12 09:59:39,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:01,370 INFO L129 PetriNetUnfolder]: 3947/16473 cut-off events. [2022-07-12 10:00:01,371 INFO L130 PetriNetUnfolder]: For 20722/20729 co-relation queries the response was YES. [2022-07-12 10:00:01,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43171 conditions, 16473 events. 3947/16473 cut-off events. For 20722/20729 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 167162 event pairs, 487 based on Foata normal form. 8/16143 useless extension candidates. Maximal degree in co-relation 40237. Up to 2119 conditions per place. [2022-07-12 10:00:01,532 INFO L132 encePairwiseOnDemand]: 131/172 looper letters, 339 selfloop transitions, 397 changer transitions 2/814 dead transitions. [2022-07-12 10:00:01,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 814 transitions, 6801 flow [2022-07-12 10:00:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-12 10:00:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-07-12 10:00:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 7252 transitions. [2022-07-12 10:00:01,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5141803743618831 [2022-07-12 10:00:01,541 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 7252 transitions. [2022-07-12 10:00:01,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 7252 transitions. [2022-07-12 10:00:01,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:01,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 7252 transitions. [2022-07-12 10:00:01,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 88.4390243902439) internal successors, (7252), 82 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:01,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 172.0) internal successors, (14276), 83 states have internal predecessors, (14276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:01,564 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 172.0) internal successors, (14276), 83 states have internal predecessors, (14276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:01,564 INFO L186 Difference]: Start difference. First operand has 387 places, 379 transitions, 2819 flow. Second operand 82 states and 7252 transitions. [2022-07-12 10:00:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 814 transitions, 6801 flow [2022-07-12 10:00:01,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 814 transitions, 6320 flow, removed 218 selfloop flow, removed 10 redundant places. [2022-07-12 10:00:01,702 INFO L242 Difference]: Finished difference. Result has 483 places, 623 transitions, 5488 flow [2022-07-12 10:00:01,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=5488, PETRI_PLACES=483, PETRI_TRANSITIONS=623} [2022-07-12 10:00:01,703 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 326 predicate places. [2022-07-12 10:00:01,703 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 623 transitions, 5488 flow [2022-07-12 10:00:01,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:01,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:01,705 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:00:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:00:01,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:01,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2032442368, now seen corresponding path program 3 times [2022-07-12 10:00:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055588167] [2022-07-12 10:00:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:02,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055588167] [2022-07-12 10:00:02,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055588167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:00:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101061657] [2022-07-12 10:00:02,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:00:02,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:02,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:02,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:00:02,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:00:02,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:00:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:00:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 10:00:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:00:03,068 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:00:03,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:00:03,077 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:00:03,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:00:03,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2022-07-12 10:00:03,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-07-12 10:00:04,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-12 10:00:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:00:04,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:00:05,087 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_357 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_357) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-07-12 10:00:05,107 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:00:05,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 30 [2022-07-12 10:00:05,119 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:00:05,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-07-12 10:00:05,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-12 10:00:05,904 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 10:00:05,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 10:00:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:00:05,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101061657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:00:05,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:00:05,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 75 [2022-07-12 10:00:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113659919] [2022-07-12 10:00:05,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:00:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-12 10:00:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-12 10:00:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5124, Unknown=1, NotChecked=144, Total=5550 [2022-07-12 10:00:05,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 172 [2022-07-12 10:00:05,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 623 transitions, 5488 flow. Second operand has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:05,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:05,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 172 [2022-07-12 10:00:05,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:57,174 INFO L129 PetriNetUnfolder]: 7941/33708 cut-off events. [2022-07-12 10:00:57,174 INFO L130 PetriNetUnfolder]: For 100817/100824 co-relation queries the response was YES. [2022-07-12 10:00:57,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112776 conditions, 33708 events. 7941/33708 cut-off events. For 100817/100824 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 380754 event pairs, 845 based on Foata normal form. 87/33171 useless extension candidates. Maximal degree in co-relation 107290. Up to 4655 conditions per place. [2022-07-12 10:00:57,893 INFO L132 encePairwiseOnDemand]: 128/172 looper letters, 817 selfloop transitions, 1391 changer transitions 24/2308 dead transitions. [2022-07-12 10:00:57,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 2308 transitions, 24172 flow [2022-07-12 10:00:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2022-07-12 10:00:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2022-07-12 10:00:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 19042 transitions. [2022-07-12 10:00:57,912 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5149269875608437 [2022-07-12 10:00:57,912 INFO L72 ComplementDD]: Start complementDD. Operand 215 states and 19042 transitions. [2022-07-12 10:00:57,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 215 states and 19042 transitions. [2022-07-12 10:00:57,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:57,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 215 states and 19042 transitions. [2022-07-12 10:00:57,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 216 states, 215 states have (on average 88.56744186046511) internal successors, (19042), 215 states have internal predecessors, (19042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:57,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 216 states, 216 states have (on average 172.0) internal successors, (37152), 216 states have internal predecessors, (37152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:57,975 INFO L81 ComplementDD]: Finished complementDD. Result has 216 states, 216 states have (on average 172.0) internal successors, (37152), 216 states have internal predecessors, (37152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:57,976 INFO L186 Difference]: Start difference. First operand has 483 places, 623 transitions, 5488 flow. Second operand 215 states and 19042 transitions. [2022-07-12 10:00:57,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 2308 transitions, 24172 flow [2022-07-12 10:00:58,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2308 transitions, 23643 flow, removed 221 selfloop flow, removed 24 redundant places. [2022-07-12 10:00:58,320 INFO L242 Difference]: Finished difference. Result has 734 places, 1669 transitions, 18702 flow [2022-07-12 10:00:58,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=215, PETRI_FLOW=18702, PETRI_PLACES=734, PETRI_TRANSITIONS=1669} [2022-07-12 10:00:58,322 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 577 predicate places. [2022-07-12 10:00:58,322 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1669 transitions, 18702 flow [2022-07-12 10:00:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 87.21333333333334) internal successors, (6541), 75 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:58,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:58,323 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:00:58,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:00:58,539 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,SelfDestructingSolverStorable11 [2022-07-12 10:00:58,539 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -453573317, now seen corresponding path program 2 times [2022-07-12 10:00:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:58,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616930669] [2022-07-12 10:00:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616930669] [2022-07-12 10:00:58,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616930669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:00:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698776498] [2022-07-12 10:00:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:00:58,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:00:58,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:58,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:00:58,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:00:58,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:00:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:00:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:00:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:00:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:58,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:00:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698776498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:00:59,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:00:59,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:00:59,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992070945] [2022-07-12 10:00:59,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:00:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:00:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:00:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:00:59,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-12 10:00:59,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1669 transitions, 18702 flow. Second operand has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:59,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:59,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-12 10:00:59,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:12,192 INFO L129 PetriNetUnfolder]: 2723/31268 cut-off events. [2022-07-12 10:01:12,192 INFO L130 PetriNetUnfolder]: For 111698/111775 co-relation queries the response was YES. [2022-07-12 10:01:12,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99268 conditions, 31268 events. 2723/31268 cut-off events. For 111698/111775 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 351624 event pairs, 657 based on Foata normal form. 194/30568 useless extension candidates. Maximal degree in co-relation 95682. Up to 1903 conditions per place. [2022-07-12 10:01:12,808 INFO L132 encePairwiseOnDemand]: 165/172 looper letters, 630 selfloop transitions, 630 changer transitions 1/2310 dead transitions. [2022-07-12 10:01:12,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 2310 transitions, 29089 flow [2022-07-12 10:01:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:01:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:01:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3631 transitions. [2022-07-12 10:01:12,812 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8796027131782945 [2022-07-12 10:01:12,813 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3631 transitions. [2022-07-12 10:01:12,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3631 transitions. [2022-07-12 10:01:12,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:12,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3631 transitions. [2022-07-12 10:01:12,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.29166666666666) internal successors, (3631), 24 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:12,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:12,822 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 172.0) internal successors, (4300), 25 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:12,822 INFO L186 Difference]: Start difference. First operand has 734 places, 1669 transitions, 18702 flow. Second operand 24 states and 3631 transitions. [2022-07-12 10:01:12,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 2310 transitions, 29089 flow [2022-07-12 10:01:13,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 2310 transitions, 28372 flow, removed 236 selfloop flow, removed 18 redundant places. [2022-07-12 10:01:13,977 INFO L242 Difference]: Finished difference. Result has 742 places, 2045 transitions, 24895 flow [2022-07-12 10:01:13,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=17999, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24895, PETRI_PLACES=742, PETRI_TRANSITIONS=2045} [2022-07-12 10:01:13,978 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 585 predicate places. [2022-07-12 10:01:13,979 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 2045 transitions, 24895 flow [2022-07-12 10:01:13,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:13,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:13,979 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:13,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 10:01:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:01:14,196 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:01:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -954089879, now seen corresponding path program 1 times [2022-07-12 10:01:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:14,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036812387] [2022-07-12 10:01:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036812387] [2022-07-12 10:01:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036812387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:01:14,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651408888] [2022-07-12 10:01:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:01:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:01:14,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:01:14,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:01:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 10:01:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:01:15,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2022-07-12 10:01:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:01:16,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2022-07-12 10:01:17,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-12 10:01:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:17,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:02:19,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:02:19,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 36 [2022-07-12 10:02:19,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:02:19,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-07-12 10:02:19,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2022-07-12 10:02:19,690 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:02:19,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-07-12 10:02:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651408888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:02:20,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:02:20,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 33] total 94 [2022-07-12 10:02:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966438320] [2022-07-12 10:02:20,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:02:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-07-12 10:02:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-07-12 10:02:20,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=7862, Unknown=40, NotChecked=0, Total=8742 [2022-07-12 10:02:20,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-07-12 10:02:20,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 2045 transitions, 24895 flow. Second operand has 94 states, 94 states have (on average 100.08510638297872) internal successors, (9408), 94 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:02:20,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:20,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-07-12 10:02:20,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:13,767 WARN L233 SmtUtils]: Spent 38.44s on a formula simplification. DAG size of input: 118 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)