/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:54:27,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:54:27,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:54:27,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 01:54:27,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 01:54:27,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 01:54:27,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 01:54:27,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 01:54:27,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 01:54:27,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 01:54:27,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 01:54:27,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 01:54:27,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:54:27,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:54:27,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:54:27,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:54:27,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:54:27,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:54:27,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:54:27,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:54:27,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:54:27,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:54:27,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:54:27,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:54:27,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 01:54:27,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 01:54:27,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 01:54:27,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 01:54:27,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 01:54:27,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 01:54:27,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 01:54:27,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 01:54:27,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 01:54:27,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 01:54:27,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 01:54:27,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 01:54:27,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 01:54:27,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 01:54:27,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:54:27,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:54:27,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:54:27,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 01:54:27,982 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:54:27,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:54:27,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:54:27,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:54:27,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:54:27,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:54:27,984 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:54:27,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:54:27,985 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:54:27,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:54:27,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:54:27,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:54:27,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:54:27,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:54:27,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:54:27,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:54:27,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:54:27,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:54:27,988 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:54:28,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:54:28,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:54:28,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:54:28,192 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:54:28,192 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:54:28,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-01-28 01:54:29,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:54:29,505 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:54:29,506 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-01-28 01:54:29,528 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59cb7b5e1/24cc4d6911bb46a19e1674364a51a230/FLAG41bb9b261 [2023-01-28 01:54:29,539 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59cb7b5e1/24cc4d6911bb46a19e1674364a51a230 [2023-01-28 01:54:29,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:54:29,543 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:54:29,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:54:29,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:54:29,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:54:29,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:54:29" (1/1) ... [2023-01-28 01:54:29,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36bccf7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:29, skipping insertion in model container [2023-01-28 01:54:29,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:54:29" (1/1) ... [2023-01-28 01:54:29,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:54:29,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:54:29,952 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2023-01-28 01:54:29,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:54:29,998 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:54:30,026 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2023-01-28 01:54:30,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:54:30,083 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:54:30,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30 WrapperNode [2023-01-28 01:54:30,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:54:30,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:54:30,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:54:30,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:54:30,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,124 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-01-28 01:54:30,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:54:30,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:54:30,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:54:30,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:54:30,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,159 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:54:30,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:54:30,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:54:30,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:54:30,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (1/1) ... [2023-01-28 01:54:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:54:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:30,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 01:54:30,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 01:54:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:54:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:54:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:54:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:54:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:54:30,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:54:30,223 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 01:54:30,378 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:54:30,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:54:30,640 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:54:30,647 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:54:30,647 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-28 01:54:30,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:54:30 BoogieIcfgContainer [2023-01-28 01:54:30,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:54:30,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:54:30,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:54:30,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:54:30,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:54:29" (1/3) ... [2023-01-28 01:54:30,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3f2d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:54:30, skipping insertion in model container [2023-01-28 01:54:30,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:54:30" (2/3) ... [2023-01-28 01:54:30,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3f2d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:54:30, skipping insertion in model container [2023-01-28 01:54:30,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:54:30" (3/3) ... [2023-01-28 01:54:30,659 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-01-28 01:54:30,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:54:30,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 01:54:30,673 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:54:30,729 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:54:30,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 388 flow [2023-01-28 01:54:30,829 INFO L130 PetriNetUnfolder]: 45/260 cut-off events. [2023-01-28 01:54:30,829 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-28 01:54:30,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 260 events. 45/260 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-28 01:54:30,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 388 flow [2023-01-28 01:54:30,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 185 transitions, 375 flow [2023-01-28 01:54:30,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:30,851 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-28 01:54:30,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-28 01:54:30,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 185 transitions, 375 flow [2023-01-28 01:54:30,904 INFO L130 PetriNetUnfolder]: 44/255 cut-off events. [2023-01-28 01:54:30,904 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:30,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 255 events. 44/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 776 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-28 01:54:30,915 INFO L119 LiptonReduction]: Number of co-enabled transitions 10336 [2023-01-28 01:54:33,424 INFO L134 LiptonReduction]: Checked pairs total: 15158 [2023-01-28 01:54:33,425 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-01-28 01:54:33,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:33,443 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ceba11a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:33,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:33,453 INFO L130 PetriNetUnfolder]: 11/41 cut-off events. [2023-01-28 01:54:33,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:33,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:33,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:54:33,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:33,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash -164803575, now seen corresponding path program 1 times [2023-01-28 01:54:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175680730] [2023-01-28 01:54:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:33,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175680730] [2023-01-28 01:54:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175680730] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:33,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247680221] [2023-01-28 01:54:33,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:33,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:33,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:33,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:54:33,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 135 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) [2023-01-28 01:54:33,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:33,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:54:33,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:33,920 INFO L130 PetriNetUnfolder]: 301/651 cut-off events. [2023-01-28 01:54:33,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:33,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-01-28 01:54:33,924 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 20 selfloop transitions, 2 changer transitions 19/46 dead transitions. [2023-01-28 01:54:33,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-01-28 01:54:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:54:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:54:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-01-28 01:54:33,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034213098729228 [2023-01-28 01:54:33,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-01-28 01:54:33,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-01-28 01:54:33,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:33,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-01-28 01:54:33,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:33,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:33,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:33,954 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 135 flow. Second operand 3 states and 515 transitions. [2023-01-28 01:54:33,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-01-28 01:54:33,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:54:33,958 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 69 flow [2023-01-28 01:54:33,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-01-28 01:54:33,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-28 01:54:33,964 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 69 flow [2023-01-28 01:54:33,964 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) [2023-01-28 01:54:33,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:33,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:33,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:54:33,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:33,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash 716448256, now seen corresponding path program 1 times [2023-01-28 01:54:33,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:33,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719759704] [2023-01-28 01:54:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:33,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719759704] [2023-01-28 01:54:34,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719759704] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978663011] [2023-01-28 01:54:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:34,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:34,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:34,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:34,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 01:54:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:54:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978663011] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:34,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:54:34,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798058757] [2023-01-28 01:54:34,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:54:34,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:54:34,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:54:34,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:54:34,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:34,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:54:34,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:34,318 INFO L130 PetriNetUnfolder]: 47/128 cut-off events. [2023-01-28 01:54:34,318 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-01-28 01:54:34,319 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-01-28 01:54:34,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-01-28 01:54:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:54:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:54:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 940 transitions. [2023-01-28 01:54:34,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45943304007820135 [2023-01-28 01:54:34,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 940 transitions. [2023-01-28 01:54:34,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 940 transitions. [2023-01-28 01:54:34,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:34,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 940 transitions. [2023-01-28 01:54:34,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.66666666666666) internal successors, (940), 6 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,334 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 69 flow. Second operand 6 states and 940 transitions. [2023-01-28 01:54:34,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-01-28 01:54:34,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:34,336 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-01-28 01:54:34,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-01-28 01:54:34,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-01-28 01:54:34,337 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-01-28 01:54:34,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:34,338 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:34,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:34,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:34,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:34,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1278120393, now seen corresponding path program 2 times [2023-01-28 01:54:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007801418] [2023-01-28 01:54:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:34,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007801418] [2023-01-28 01:54:34,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007801418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741349370] [2023-01-28 01:54:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:54:34,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:34,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:34,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 01:54:34,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:54:34,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:54:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:54:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741349370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:34,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:54:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848237943] [2023-01-28 01:54:34,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:54:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:54:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:54:34,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:54:34,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:34,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:54:34,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:34,905 INFO L130 PetriNetUnfolder]: 47/134 cut-off events. [2023-01-28 01:54:34,906 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:54:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-01-28 01:54:34,908 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-01-28 01:54:34,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-01-28 01:54:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:54:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:54:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1861 transitions. [2023-01-28 01:54:34,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478983382209187 [2023-01-28 01:54:34,913 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1861 transitions. [2023-01-28 01:54:34,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1861 transitions. [2023-01-28 01:54:34,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:34,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1861 transitions. [2023-01-28 01:54:34,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.08333333333334) internal successors, (1861), 12 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,927 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,927 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1861 transitions. [2023-01-28 01:54:34,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-01-28 01:54:34,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:34,930 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-01-28 01:54:34,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-01-28 01:54:34,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-01-28 01:54:34,931 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-01-28 01:54:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:34,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:35,137 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,SelfDestructingSolverStorable2 [2023-01-28 01:54:35,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:35,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 766826089, now seen corresponding path program 3 times [2023-01-28 01:54:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:35,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610775689] [2023-01-28 01:54:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:35,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:35,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:54:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:35,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:54:35,246 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:54:35,253 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:54:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:54:35,255 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:54:35,258 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:54:35,261 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:54:35,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:54:35,292 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:54:35,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,337 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-28 01:54:35,338 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:54:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-28 01:54:35,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:35,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:54:35,383 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-28 01:54:35,383 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:54:35,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-28 01:54:35,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 31416 [2023-01-28 01:54:38,296 INFO L134 LiptonReduction]: Checked pairs total: 55124 [2023-01-28 01:54:38,296 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-01-28 01:54:38,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:38,299 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ceba11a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:38,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:38,307 INFO L130 PetriNetUnfolder]: 35/109 cut-off events. [2023-01-28 01:54:38,307 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:54:38,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:38,307 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:38,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:38,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1123911026, now seen corresponding path program 1 times [2023-01-28 01:54:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145669179] [2023-01-28 01:54:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:38,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:38,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145669179] [2023-01-28 01:54:38,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145669179] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:38,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:38,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:38,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029415038] [2023-01-28 01:54:38,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:38,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:38,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:38,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:38,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:38,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:54:38,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:38,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:38,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:54:38,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:39,594 INFO L130 PetriNetUnfolder]: 9872/15757 cut-off events. [2023-01-28 01:54:39,594 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-01-28 01:54:39,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 15757 events. 9872/15757 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 104377 event pairs, 9112 based on Foata normal form. 2730/16056 useless extension candidates. Maximal degree in co-relation 12164. Up to 14349 conditions per place. [2023-01-28 01:54:39,691 INFO L137 encePairwiseOnDemand]: 444/478 looper letters, 36 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-01-28 01:54:39,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-01-28 01:54:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:54:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:54:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-01-28 01:54:39,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49511854951185497 [2023-01-28 01:54:39,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-01-28 01:54:39,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-01-28 01:54:39,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:39,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-01-28 01:54:39,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:39,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:39,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:39,700 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 710 transitions. [2023-01-28 01:54:39,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-01-28 01:54:39,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:54:39,705 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-01-28 01:54:39,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-01-28 01:54:39,707 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 01:54:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-01-28 01:54:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:39,708 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:39,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:54:39,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:39,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -207077384, now seen corresponding path program 1 times [2023-01-28 01:54:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336377191] [2023-01-28 01:54:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:39,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:39,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:39,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336377191] [2023-01-28 01:54:39,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336377191] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:39,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352433275] [2023-01-28 01:54:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:39,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:39,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:39,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 01:54:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:39,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:54:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:39,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352433275] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:39,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:39,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:54:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428940926] [2023-01-28 01:54:39,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:39,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:54:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:54:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:54:39,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:54:39,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:39,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:39,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:54:39,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:40,122 INFO L130 PetriNetUnfolder]: 1738/2923 cut-off events. [2023-01-28 01:54:40,122 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-01-28 01:54:40,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2923 events. 1738/2923 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16152 event pairs, 1617 based on Foata normal form. 0/2391 useless extension candidates. Maximal degree in co-relation 5636. Up to 2647 conditions per place. [2023-01-28 01:54:40,135 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-01-28 01:54:40,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 210 flow [2023-01-28 01:54:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:54:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:54:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-01-28 01:54:40,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44839609483960946 [2023-01-28 01:54:40,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-01-28 01:54:40,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-01-28 01:54:40,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:40,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-01-28 01:54:40,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,147 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,147 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1286 transitions. [2023-01-28 01:54:40,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 210 flow [2023-01-28 01:54:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:40,150 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-01-28 01:54:40,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-01-28 01:54:40,153 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-01-28 01:54:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-01-28 01:54:40,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:40,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:40,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:40,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1964701426, now seen corresponding path program 2 times [2023-01-28 01:54:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247709066] [2023-01-28 01:54:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:40,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247709066] [2023-01-28 01:54:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247709066] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117508562] [2023-01-28 01:54:40,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:54:40,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:40,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:40,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 01:54:40,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:54:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:54:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:54:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:40,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:40,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117508562] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:40,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:40,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:54:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230241797] [2023-01-28 01:54:40,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:54:40,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:54:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:54:40,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:54:40,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:40,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:54:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:40,898 INFO L130 PetriNetUnfolder]: 1738/2929 cut-off events. [2023-01-28 01:54:40,898 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 01:54:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2929 events. 1738/2929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16191 event pairs, 1617 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 5621. Up to 2647 conditions per place. [2023-01-28 01:54:40,918 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-01-28 01:54:40,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-01-28 01:54:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:54:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:54:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2537 transitions. [2023-01-28 01:54:40,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422942817294282 [2023-01-28 01:54:40,925 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2537 transitions. [2023-01-28 01:54:40,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2537 transitions. [2023-01-28 01:54:40,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:40,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2537 transitions. [2023-01-28 01:54:40,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.41666666666666) internal successors, (2537), 12 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,941 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,941 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2537 transitions. [2023-01-28 01:54:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-01-28 01:54:40,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:40,944 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-01-28 01:54:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-01-28 01:54:40,945 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-01-28 01:54:40,945 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-01-28 01:54:40,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:40,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:40,947 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:41,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:41,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:41,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash -193054414, now seen corresponding path program 3 times [2023-01-28 01:54:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:41,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361883536] [2023-01-28 01:54:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:41,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:41,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:54:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:41,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:54:41,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:54:41,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:54:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:54:41,207 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:54:41,208 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:54:41,208 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:54:41,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:54:41,247 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:54:41,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,326 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-28 01:54:41,327 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:54:41,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-28 01:54:41,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:41,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:54:41,412 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-28 01:54:41,412 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:54:41,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-28 01:54:41,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 61608 [2023-01-28 01:54:44,798 INFO L134 LiptonReduction]: Checked pairs total: 109900 [2023-01-28 01:54:44,798 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-01-28 01:54:44,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:44,800 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ceba11a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:44,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:44,811 INFO L130 PetriNetUnfolder]: 62/180 cut-off events. [2023-01-28 01:54:44,811 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:54:44,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:44,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:44,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:44,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1033079782, now seen corresponding path program 1 times [2023-01-28 01:54:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:44,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439202220] [2023-01-28 01:54:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:44,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:44,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439202220] [2023-01-28 01:54:44,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439202220] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:44,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:44,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693909193] [2023-01-28 01:54:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:44,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:44,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:54:44,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:54:44,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:44,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:54:44,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:05,569 INFO L130 PetriNetUnfolder]: 252661/348965 cut-off events. [2023-01-28 01:55:05,569 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-01-28 01:55:06,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8440. Compared 2625001 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-01-28 01:55:06,490 INFO L137 encePairwiseOnDemand]: 556/601 looper letters, 53 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-01-28 01:55:06,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-01-28 01:55:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:55:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:55:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-01-28 01:55:06,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013865779256794 [2023-01-28 01:55:06,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-01-28 01:55:06,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-01-28 01:55:06,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:06,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-01-28 01:55:06,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:06,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:06,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:06,501 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 904 transitions. [2023-01-28 01:55:06,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-01-28 01:55:06,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:55:06,507 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-01-28 01:55:06,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-01-28 01:55:06,508 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-28 01:55:06,508 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-01-28 01:55:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:06,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:06,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:55:06,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:06,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1353270178, now seen corresponding path program 1 times [2023-01-28 01:55:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189921730] [2023-01-28 01:55:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:06,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:06,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189921730] [2023-01-28 01:55:06,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189921730] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128220066] [2023-01-28 01:55:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:06,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:06,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 01:55:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:55:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:06,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128220066] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:06,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:06,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:55:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085766160] [2023-01-28 01:55:06,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:55:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:55:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:55:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:55:06,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 263.85714285714283) internal successors, (1847), 7 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:06,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:06,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:55:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:10,304 INFO L130 PetriNetUnfolder]: 46210/64953 cut-off events. [2023-01-28 01:55:10,304 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2023-01-28 01:55:10,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127740 conditions, 64953 events. 46210/64953 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431889 event pairs, 43965 based on Foata normal form. 0/53862 useless extension candidates. Maximal degree in co-relation 127726. Up to 61443 conditions per place. [2023-01-28 01:55:10,547 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-01-28 01:55:10,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 291 flow [2023-01-28 01:55:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:55:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:55:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1633 transitions. [2023-01-28 01:55:10,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528563505268996 [2023-01-28 01:55:10,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1633 transitions. [2023-01-28 01:55:10,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1633 transitions. [2023-01-28 01:55:10,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:10,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1633 transitions. [2023-01-28 01:55:10,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.1666666666667) internal successors, (1633), 6 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:10,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:10,561 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:10,561 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1633 transitions. [2023-01-28 01:55:10,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 291 flow [2023-01-28 01:55:10,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 281 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:10,565 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-01-28 01:55:10,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-01-28 01:55:10,566 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-01-28 01:55:10,566 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-01-28 01:55:10,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 263.85714285714283) internal successors, (1847), 7 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:10,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:10,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:10,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 01:55:10,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:10,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash 756541926, now seen corresponding path program 2 times [2023-01-28 01:55:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:10,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90228475] [2023-01-28 01:55:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:10,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90228475] [2023-01-28 01:55:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90228475] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688120500] [2023-01-28 01:55:10,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:55:10,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:10,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 01:55:10,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:55:10,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:55:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:55:10,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:10,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688120500] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:11,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:55:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478757617] [2023-01-28 01:55:11,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:55:11,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:55:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:55:11,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:55:11,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:11,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:11,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:55:11,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:14,846 INFO L130 PetriNetUnfolder]: 46210/64959 cut-off events. [2023-01-28 01:55:14,847 INFO L131 PetriNetUnfolder]: For 822/822 co-relation queries the response was YES. [2023-01-28 01:55:14,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127353 conditions, 64959 events. 46210/64959 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431856 event pairs, 43965 based on Foata normal form. 6/53875 useless extension candidates. Maximal degree in co-relation 127293. Up to 61443 conditions per place. [2023-01-28 01:55:15,118 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-01-28 01:55:15,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 353 flow [2023-01-28 01:55:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:55:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:55:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3214 transitions. [2023-01-28 01:55:15,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456461453133666 [2023-01-28 01:55:15,125 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3214 transitions. [2023-01-28 01:55:15,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3214 transitions. [2023-01-28 01:55:15,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:15,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3214 transitions. [2023-01-28 01:55:15,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.8333333333333) internal successors, (3214), 12 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:15,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:15,140 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:15,140 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3214 transitions. [2023-01-28 01:55:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 353 flow [2023-01-28 01:55:15,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:15,142 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-01-28 01:55:15,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-01-28 01:55:15,143 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-01-28 01:55:15,143 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-01-28 01:55:15,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:15,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:15,144 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:15,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:15,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:15,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1545885414, now seen corresponding path program 3 times [2023-01-28 01:55:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616413299] [2023-01-28 01:55:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:15,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:15,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:55:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:15,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:55:15,413 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:55:15,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:55:15,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:55:15,414 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:55:15,414 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:55:15,414 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:55:15,415 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:55:15,444 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:55:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,550 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-28 01:55:15,550 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:55:15,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-28 01:55:15,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:15,568 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:55:15,689 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-28 01:55:15,689 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:55:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-28 01:55:15,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 101456 [2023-01-28 01:55:19,432 INFO L134 LiptonReduction]: Checked pairs total: 181238 [2023-01-28 01:55:19,432 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-01-28 01:55:19,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:19,434 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ceba11a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:19,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:19,445 INFO L130 PetriNetUnfolder]: 85/247 cut-off events. [2023-01-28 01:55:19,445 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 01:55:19,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:19,445 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:19,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:19,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash -154404429, now seen corresponding path program 1 times [2023-01-28 01:55:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:19,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294417966] [2023-01-28 01:55:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 01:55:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294417966] [2023-01-28 01:55:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294417966] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:19,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812732164] [2023-01-28 01:55:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:19,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 724 [2023-01-28 01:55:19,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:19,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:19,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 724 [2023-01-28 01:55:19,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand