./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 10:34:47,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:34:47,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:34:47,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:34:47,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:34:47,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:34:47,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:34:47,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:34:47,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:34:47,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:34:47,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:34:47,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:34:47,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:34:47,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:34:47,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:34:47,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:34:47,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:34:47,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:34:47,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:34:47,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:34:47,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:34:47,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:34:47,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:34:47,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:34:47,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:34:47,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:34:47,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:34:47,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:34:47,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:34:47,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:34:47,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:34:47,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:34:47,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:34:47,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:34:47,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:34:47,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:34:47,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:34:47,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:34:47,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:34:47,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:34:47,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:34:47,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:34:47,263 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:34:47,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:34:47,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:34:47,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:34:47,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:34:47,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:34:47,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:34:47,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:34:47,267 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:34:47,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:34:47,267 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:34:47,268 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:34:47,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:34:47,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:34:47,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:34:47,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:34:47,270 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:34:47,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:34:47,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:34:47,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:34:47,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:34:47,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:34:47,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:34:47,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:34:47,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:34:47,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:34:47,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:34:47,272 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:34:47,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:34:47,272 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:34:47,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:34:47,273 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:34:47,273 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:34:47,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:34:47,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:34:47,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:34:47,606 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:34:47,606 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:34:47,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-08-30 10:34:48,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:34:49,007 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:34:49,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-08-30 10:34:49,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95bfeea50/f40f4cb42f0f416580c1581c0ebcf782/FLAG2468f2b89 [2023-08-30 10:34:49,041 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95bfeea50/f40f4cb42f0f416580c1581c0ebcf782 [2023-08-30 10:34:49,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:34:49,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:34:49,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:34:49,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:34:49,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:34:49,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff76dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49, skipping insertion in model container [2023-08-30 10:34:49,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:34:49,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:34:49,545 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_86-lists_racing.i[47038,47051] [2023-08-30 10:34:49,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:34:49,693 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:34:49,727 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_86-lists_racing.i[47038,47051] [2023-08-30 10:34:49,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:34:49,823 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:34:49,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49 WrapperNode [2023-08-30 10:34:49,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:34:49,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:34:49,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:34:49,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:34:49,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,903 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 246 [2023-08-30 10:34:49,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:34:49,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:34:49,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:34:49,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:34:49,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:34:49,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:34:49,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:34:49,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:34:49,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (1/1) ... [2023-08-30 10:34:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:34:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:34:49,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 10:34:50,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 10:34:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:34:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 10:34:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 10:34:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 10:34:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:34:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 10:34:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:34:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 10:34:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:34:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:34:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:34:50,027 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 10:34:50,212 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:34:50,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:34:50,586 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:34:50,595 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:34:50,596 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 10:34:50,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:34:50 BoogieIcfgContainer [2023-08-30 10:34:50,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:34:50,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:34:50,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:34:50,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:34:50,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:34:49" (1/3) ... [2023-08-30 10:34:50,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16271b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:34:50, skipping insertion in model container [2023-08-30 10:34:50,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:34:49" (2/3) ... [2023-08-30 10:34:50,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16271b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:34:50, skipping insertion in model container [2023-08-30 10:34:50,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:34:50" (3/3) ... [2023-08-30 10:34:50,610 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-08-30 10:34:50,618 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:34:50,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:34:50,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-30 10:34:50,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:34:50,726 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 10:34:50,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 260 transitions, 542 flow [2023-08-30 10:34:50,921 INFO L130 PetriNetUnfolder]: 54/489 cut-off events. [2023-08-30 10:34:50,921 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-08-30 10:34:50,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 489 events. 54/489 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2024 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 231. Up to 8 conditions per place. [2023-08-30 10:34:50,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 260 transitions, 542 flow [2023-08-30 10:34:50,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 259 transitions, 538 flow [2023-08-30 10:34:50,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:34:50,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 259 transitions, 538 flow [2023-08-30 10:34:50,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 259 transitions, 538 flow [2023-08-30 10:34:50,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 259 transitions, 538 flow [2023-08-30 10:34:51,028 INFO L130 PetriNetUnfolder]: 54/488 cut-off events. [2023-08-30 10:34:51,029 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 10:34:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 488 events. 54/488 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2022 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 231. Up to 8 conditions per place. [2023-08-30 10:34:51,043 INFO L119 LiptonReduction]: Number of co-enabled transitions 20802 [2023-08-30 10:34:58,151 INFO L134 LiptonReduction]: Checked pairs total: 34896 [2023-08-30 10:34:58,151 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-08-30 10:34:58,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:34:58,169 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2dc8ac3d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:34:58,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-30 10:34:58,172 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 10:34:58,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:34:58,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:34:58,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 10:34:58,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:34:58,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:34:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 32504, now seen corresponding path program 1 times [2023-08-30 10:34:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:34:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188719074] [2023-08-30 10:34:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:34:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:34:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:34:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:34:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:34:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188719074] [2023-08-30 10:34:58,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188719074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:34:58,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:34:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:34:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721559744] [2023-08-30 10:34:58,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:34:58,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:34:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:34:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:34:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:34:58,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 485 [2023-08-30 10:34:58,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:58,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:34:58,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 485 [2023-08-30 10:34:58,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:34:59,417 INFO L130 PetriNetUnfolder]: 4461/7478 cut-off events. [2023-08-30 10:34:59,417 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-30 10:34:59,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14621 conditions, 7478 events. 4461/7478 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 45793 event pairs, 4182 based on Foata normal form. 210/5763 useless extension candidates. Maximal degree in co-relation 12749. Up to 7047 conditions per place. [2023-08-30 10:34:59,453 INFO L137 encePairwiseOnDemand]: 469/485 looper letters, 61 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-30 10:34:59,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 288 flow [2023-08-30 10:34:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:34:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:34:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-08-30 10:34:59,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319587628865979 [2023-08-30 10:34:59,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-08-30 10:34:59,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-08-30 10:34:59,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:34:59,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-08-30 10:34:59,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:59,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:59,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:59,487 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 184 flow. Second operand 3 states and 774 transitions. [2023-08-30 10:34:59,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 288 flow [2023-08-30 10:34:59,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:34:59,501 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 171 flow [2023-08-30 10:34:59,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 10:34:59,505 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-30 10:34:59,507 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 171 flow [2023-08-30 10:34:59,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:59,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:34:59,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 10:34:59,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:34:59,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:34:59,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:34:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1008756, now seen corresponding path program 1 times [2023-08-30 10:34:59,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:34:59,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403355672] [2023-08-30 10:34:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:34:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:34:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:34:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:34:59,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:34:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403355672] [2023-08-30 10:34:59,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403355672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:34:59,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:34:59,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:34:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963226661] [2023-08-30 10:34:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:34:59,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:34:59,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:34:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:34:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:34:59,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 485 [2023-08-30 10:34:59,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:34:59,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:34:59,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 485 [2023-08-30 10:34:59,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:00,511 INFO L130 PetriNetUnfolder]: 4461/7477 cut-off events. [2023-08-30 10:35:00,511 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 10:35:00,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14625 conditions, 7477 events. 4461/7477 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 45772 event pairs, 4182 based on Foata normal form. 0/5553 useless extension candidates. Maximal degree in co-relation 14612. Up to 7046 conditions per place. [2023-08-30 10:35:00,549 INFO L137 encePairwiseOnDemand]: 483/485 looper letters, 61 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 10:35:00,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 291 flow [2023-08-30 10:35:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:35:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:35:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-08-30 10:35:00,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209621993127148 [2023-08-30 10:35:00,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-08-30 10:35:00,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-08-30 10:35:00,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:00,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-08-30 10:35:00,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:00,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:00,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:00,560 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 171 flow. Second operand 3 states and 758 transitions. [2023-08-30 10:35:00,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 291 flow [2023-08-30 10:35:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 287 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 10:35:00,562 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 165 flow [2023-08-30 10:35:00,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-30 10:35:00,563 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-30 10:35:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 165 flow [2023-08-30 10:35:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:00,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 10:35:00,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 10:35:00,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:35:00,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash -13135970, now seen corresponding path program 1 times [2023-08-30 10:35:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185138367] [2023-08-30 10:35:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:35:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185138367] [2023-08-30 10:35:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185138367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:35:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402953095] [2023-08-30 10:35:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:35:00,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:35:00,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 10:35:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:35:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:35:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:35:00,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:35:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:35:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402953095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:35:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:35:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:35:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364773707] [2023-08-30 10:35:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:35:00,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:35:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:35:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:35:00,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 485 [2023-08-30 10:35:00,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:00,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:00,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 485 [2023-08-30 10:35:00,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:01,579 INFO L130 PetriNetUnfolder]: 4461/7480 cut-off events. [2023-08-30 10:35:01,579 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 10:35:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14633 conditions, 7480 events. 4461/7480 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 45746 event pairs, 4182 based on Foata normal form. 0/5556 useless extension candidates. Maximal degree in co-relation 14623. Up to 7046 conditions per place. [2023-08-30 10:35:01,612 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 60 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-30 10:35:01,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 307 flow [2023-08-30 10:35:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:35:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:35:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1454 transitions. [2023-08-30 10:35:01,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49965635738831615 [2023-08-30 10:35:01,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1454 transitions. [2023-08-30 10:35:01,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1454 transitions. [2023-08-30 10:35:01,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:01,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1454 transitions. [2023-08-30 10:35:01,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.33333333333334) internal successors, (1454), 6 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:01,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:01,626 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:01,627 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 165 flow. Second operand 6 states and 1454 transitions. [2023-08-30 10:35:01,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 307 flow [2023-08-30 10:35:01,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:35:01,629 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 200 flow [2023-08-30 10:35:01,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-08-30 10:35:01,630 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2023-08-30 10:35:01,630 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 200 flow [2023-08-30 10:35:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:01,632 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 10:35:01,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 10:35:01,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:01,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:35:01,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash 742676378, now seen corresponding path program 2 times [2023-08-30 10:35:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62246666] [2023-08-30 10:35:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 10:35:01,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:01,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62246666] [2023-08-30 10:35:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62246666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:35:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:35:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:35:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209357466] [2023-08-30 10:35:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:35:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:35:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:35:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:35:01,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 485 [2023-08-30 10:35:01,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:01,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:01,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 485 [2023-08-30 10:35:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:02,627 INFO L130 PetriNetUnfolder]: 4320/7104 cut-off events. [2023-08-30 10:35:02,627 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 10:35:02,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13999 conditions, 7104 events. 4320/7104 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 42516 event pairs, 2395 based on Foata normal form. 0/5324 useless extension candidates. Maximal degree in co-relation 13985. Up to 6766 conditions per place. [2023-08-30 10:35:02,660 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 68 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-30 10:35:02,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 354 flow [2023-08-30 10:35:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:35:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:35:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-08-30 10:35:02,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264604810996564 [2023-08-30 10:35:02,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-08-30 10:35:02,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-08-30 10:35:02,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:02,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-08-30 10:35:02,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:02,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:02,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:02,670 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 200 flow. Second operand 3 states and 766 transitions. [2023-08-30 10:35:02,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 354 flow [2023-08-30 10:35:02,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 340 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 10:35:02,674 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 190 flow [2023-08-30 10:35:02,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-08-30 10:35:02,675 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2023-08-30 10:35:02,675 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 190 flow [2023-08-30 10:35:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:02,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:02,676 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:35:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:35:02,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:35:02,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1088443362, now seen corresponding path program 1 times [2023-08-30 10:35:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:02,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380023324] [2023-08-30 10:35:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 10:35:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380023324] [2023-08-30 10:35:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380023324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:35:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683831458] [2023-08-30 10:35:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:02,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:35:02,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:35:02,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 10:35:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 10:35:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:35:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:35:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:35:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:35:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683831458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:35:03,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:35:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 10:35:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725563199] [2023-08-30 10:35:03,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:35:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:35:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:35:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:35:03,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 485 [2023-08-30 10:35:03,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 229.85714285714286) internal successors, (3218), 14 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:03,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:03,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 485 [2023-08-30 10:35:03,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:03,350 INFO L130 PetriNetUnfolder]: 15/56 cut-off events. [2023-08-30 10:35:03,350 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-30 10:35:03,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 56 events. 15/56 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 6 based on Foata normal form. 14/70 useless extension candidates. Maximal degree in co-relation 150. Up to 30 conditions per place. [2023-08-30 10:35:03,350 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-08-30 10:35:03,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 183 flow [2023-08-30 10:35:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 10:35:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 10:35:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3230 transitions. [2023-08-30 10:35:03,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47569955817378495 [2023-08-30 10:35:03,360 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3230 transitions. [2023-08-30 10:35:03,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3230 transitions. [2023-08-30 10:35:03,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:03,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3230 transitions. [2023-08-30 10:35:03,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 230.71428571428572) internal successors, (3230), 14 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:03,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:03,384 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:03,384 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 190 flow. Second operand 14 states and 3230 transitions. [2023-08-30 10:35:03,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 183 flow [2023-08-30 10:35:03,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 177 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 10:35:03,387 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-30 10:35:03,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-30 10:35:03,389 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -29 predicate places. [2023-08-30 10:35:03,389 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-30 10:35:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 229.85714285714286) internal successors, (3218), 14 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:03,393 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 18 remaining) [2023-08-30 10:35:03,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2023-08-30 10:35:03,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-08-30 10:35:03,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-08-30 10:35:03,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-08-30 10:35:03,394 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2023-08-30 10:35:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 18 remaining) [2023-08-30 10:35:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-08-30 10:35:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-08-30 10:35:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-08-30 10:35:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-08-30 10:35:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-08-30 10:35:03,397 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-08-30 10:35:03,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 10:35:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:03,603 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-30 10:35:03,604 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:35:03,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 260 transitions, 542 flow [2023-08-30 10:35:03,665 INFO L130 PetriNetUnfolder]: 54/489 cut-off events. [2023-08-30 10:35:03,665 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-08-30 10:35:03,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 489 events. 54/489 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2024 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 231. Up to 8 conditions per place. [2023-08-30 10:35:03,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 260 transitions, 542 flow [2023-08-30 10:35:03,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 254 transitions, 524 flow [2023-08-30 10:35:03,671 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:35:03,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 254 transitions, 524 flow [2023-08-30 10:35:03,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 254 transitions, 524 flow [2023-08-30 10:35:03,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 254 transitions, 524 flow [2023-08-30 10:35:03,717 INFO L130 PetriNetUnfolder]: 50/465 cut-off events. [2023-08-30 10:35:03,717 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-08-30 10:35:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 465 events. 50/465 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1871 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 224. Up to 8 conditions per place. [2023-08-30 10:35:03,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 19700 [2023-08-30 10:35:09,328 INFO L134 LiptonReduction]: Checked pairs total: 30726 [2023-08-30 10:35:09,329 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-30 10:35:09,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:35:09,331 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2dc8ac3d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:35:09,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 10:35:09,335 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2023-08-30 10:35:09,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:35:09,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:09,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 10:35:09,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:35:09,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1012773551, now seen corresponding path program 1 times [2023-08-30 10:35:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171322225] [2023-08-30 10:35:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171322225] [2023-08-30 10:35:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171322225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:35:09,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:35:09,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:35:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020297236] [2023-08-30 10:35:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:35:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:35:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:35:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:35:09,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 476 [2023-08-30 10:35:09,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:09,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:09,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 476 [2023-08-30 10:35:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:10,016 INFO L130 PetriNetUnfolder]: 4913/8106 cut-off events. [2023-08-30 10:35:10,017 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 10:35:10,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15886 conditions, 8106 events. 4913/8106 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 47905 event pairs, 4630 based on Foata normal form. 232/6279 useless extension candidates. Maximal degree in co-relation 14057. Up to 7698 conditions per place. [2023-08-30 10:35:10,034 INFO L137 encePairwiseOnDemand]: 462/476 looper letters, 44 selfloop transitions, 2 changer transitions 13/65 dead transitions. [2023-08-30 10:35:10,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 264 flow [2023-08-30 10:35:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:35:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:35:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2023-08-30 10:35:10,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371148459383753 [2023-08-30 10:35:10,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2023-08-30 10:35:10,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2023-08-30 10:35:10,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:10,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2023-08-30 10:35:10,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,042 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 166 flow. Second operand 3 states and 767 transitions. [2023-08-30 10:35:10,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 264 flow [2023-08-30 10:35:10,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:35:10,047 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 124 flow [2023-08-30 10:35:10,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-08-30 10:35:10,048 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-30 10:35:10,048 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 124 flow [2023-08-30 10:35:10,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:10,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 10:35:10,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 10:35:10,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:35:10,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 278367422, now seen corresponding path program 1 times [2023-08-30 10:35:10,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:10,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46270241] [2023-08-30 10:35:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:10,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:10,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:10,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46270241] [2023-08-30 10:35:10,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46270241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:35:10,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035638334] [2023-08-30 10:35:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:10,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:10,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:35:10,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:35:10,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 10:35:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:35:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:35:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:10,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:35:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:10,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035638334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:35:10,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:35:10,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:35:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584031712] [2023-08-30 10:35:10,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:35:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:35:10,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:35:10,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:35:10,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 476 [2023-08-30 10:35:10,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:10,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 476 [2023-08-30 10:35:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:10,621 INFO L130 PetriNetUnfolder]: 2463/4129 cut-off events. [2023-08-30 10:35:10,621 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:35:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8078 conditions, 4129 events. 2463/4129 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 21996 event pairs, 2342 based on Foata normal form. 0/3016 useless extension candidates. Maximal degree in co-relation 8065. Up to 3904 conditions per place. [2023-08-30 10:35:10,634 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 44 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-08-30 10:35:10,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 234 flow [2023-08-30 10:35:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:35:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:35:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1438 transitions. [2023-08-30 10:35:10,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035014005602241 [2023-08-30 10:35:10,640 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1438 transitions. [2023-08-30 10:35:10,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1438 transitions. [2023-08-30 10:35:10,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:10,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1438 transitions. [2023-08-30 10:35:10,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,649 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,649 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 124 flow. Second operand 6 states and 1438 transitions. [2023-08-30 10:35:10,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 234 flow [2023-08-30 10:35:10,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 10:35:10,652 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 156 flow [2023-08-30 10:35:10,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-30 10:35:10,653 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2023-08-30 10:35:10,653 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 156 flow [2023-08-30 10:35:10,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:10,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:10,654 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 10:35:10,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 10:35:10,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:10,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:35:10,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash -156417903, now seen corresponding path program 2 times [2023-08-30 10:35:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375714648] [2023-08-30 10:35:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:11,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375714648] [2023-08-30 10:35:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375714648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:35:11,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123947241] [2023-08-30 10:35:11,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:35:11,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:11,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:35:11,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:35:11,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 10:35:11,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:35:11,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:35:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 10:35:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:35:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:11,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:35:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:11,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123947241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:35:11,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:35:11,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 10:35:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342311027] [2023-08-30 10:35:11,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:35:11,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 10:35:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:35:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 10:35:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:35:11,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 476 [2023-08-30 10:35:11,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 232.30769230769232) internal successors, (3020), 13 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:11,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:35:11,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 476 [2023-08-30 10:35:11,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:35:11,751 INFO L130 PetriNetUnfolder]: 2463/4135 cut-off events. [2023-08-30 10:35:11,752 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 10:35:11,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8115 conditions, 4135 events. 2463/4135 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 21999 event pairs, 2342 based on Foata normal form. 6/3029 useless extension candidates. Maximal degree in co-relation 8056. Up to 3904 conditions per place. [2023-08-30 10:35:11,764 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 44 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-08-30 10:35:11,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 302 flow [2023-08-30 10:35:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 10:35:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 10:35:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2833 transitions. [2023-08-30 10:35:11,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959733893557423 [2023-08-30 10:35:11,772 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2833 transitions. [2023-08-30 10:35:11,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2833 transitions. [2023-08-30 10:35:11,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:35:11,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2833 transitions. [2023-08-30 10:35:11,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 236.08333333333334) internal successors, (2833), 12 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:11,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:11,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:11,788 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 156 flow. Second operand 12 states and 2833 transitions. [2023-08-30 10:35:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 302 flow [2023-08-30 10:35:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 61 transitions, 288 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 10:35:11,790 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 226 flow [2023-08-30 10:35:11,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=226, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2023-08-30 10:35:11,791 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 15 predicate places. [2023-08-30 10:35:11,791 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 226 flow [2023-08-30 10:35:11,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 232.30769230769232) internal successors, (3020), 13 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:35:11,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:35:11,792 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 10:35:11,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 10:35:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:11,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:35:11,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:35:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 96264561, now seen corresponding path program 3 times [2023-08-30 10:35:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:35:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38857215] [2023-08-30 10:35:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:35:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:35:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:35:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:35:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:35:12,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38857215] [2023-08-30 10:35:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38857215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:35:12,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617063574] [2023-08-30 10:35:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 10:35:12,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:35:12,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:35:12,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:35:12,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 10:40:11,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 10:40:11,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:40:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 10:40:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:40:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:11,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:40:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617063574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:40:11,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:40:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-30 10:40:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864939396] [2023-08-30 10:40:11,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:40:11,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 10:40:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:40:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 10:40:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 10:40:11,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 476 [2023-08-30 10:40:11,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 226 flow. Second operand has 25 states, 25 states have (on average 232.16) internal successors, (5804), 25 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:11,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:40:11,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 476 [2023-08-30 10:40:11,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:40:12,141 INFO L130 PetriNetUnfolder]: 2463/4147 cut-off events. [2023-08-30 10:40:12,142 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-08-30 10:40:12,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8199 conditions, 4147 events. 2463/4147 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 21991 event pairs, 2342 based on Foata normal form. 12/3047 useless extension candidates. Maximal degree in co-relation 8062. Up to 3904 conditions per place. [2023-08-30 10:40:12,157 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 44 selfloop transitions, 23 changer transitions 0/73 dead transitions. [2023-08-30 10:40:12,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 73 transitions, 456 flow [2023-08-30 10:40:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 10:40:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 10:40:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5623 transitions. [2023-08-30 10:40:12,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49220938375350143 [2023-08-30 10:40:12,170 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5623 transitions. [2023-08-30 10:40:12,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5623 transitions. [2023-08-30 10:40:12,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:40:12,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5623 transitions. [2023-08-30 10:40:12,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 234.29166666666666) internal successors, (5623), 24 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:12,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 476.0) internal successors, (11900), 25 states have internal predecessors, (11900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:12,200 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 476.0) internal successors, (11900), 25 states have internal predecessors, (11900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:12,201 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 226 flow. Second operand 24 states and 5623 transitions. [2023-08-30 10:40:12,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 73 transitions, 456 flow [2023-08-30 10:40:12,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 73 transitions, 384 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-08-30 10:40:12,205 INFO L231 Difference]: Finished difference. Result has 109 places, 73 transitions, 346 flow [2023-08-30 10:40:12,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=109, PETRI_TRANSITIONS=73} [2023-08-30 10:40:12,206 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 45 predicate places. [2023-08-30 10:40:12,206 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 73 transitions, 346 flow [2023-08-30 10:40:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 232.16) internal successors, (5804), 25 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:12,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:40:12,208 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-08-30 10:40:12,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 10:40:12,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:40:12,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:40:12,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:40:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 55421745, now seen corresponding path program 4 times [2023-08-30 10:40:12,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:40:12,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968081496] [2023-08-30 10:40:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:40:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:40:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:40:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:40:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968081496] [2023-08-30 10:40:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968081496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:40:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800186166] [2023-08-30 10:40:13,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 10:40:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:40:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:40:13,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:40:13,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 10:40:14,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 10:40:14,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:40:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 10:40:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:40:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:14,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:40:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800186166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:40:14,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:40:14,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-08-30 10:40:14,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938405362] [2023-08-30 10:40:14,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:40:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 10:40:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:40:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 10:40:14,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 10:40:14,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 476 [2023-08-30 10:40:14,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 73 transitions, 346 flow. Second operand has 49 states, 49 states have (on average 232.08163265306123) internal successors, (11372), 49 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:14,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:40:14,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 476 [2023-08-30 10:40:14,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:40:15,648 INFO L130 PetriNetUnfolder]: 2463/4171 cut-off events. [2023-08-30 10:40:15,649 INFO L131 PetriNetUnfolder]: For 5240/5240 co-relation queries the response was YES. [2023-08-30 10:40:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8343 conditions, 4171 events. 2463/4171 cut-off events. For 5240/5240 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 21991 event pairs, 2342 based on Foata normal form. 24/3083 useless extension candidates. Maximal degree in co-relation 8074. Up to 3904 conditions per place. [2023-08-30 10:40:15,668 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 44 selfloop transitions, 47 changer transitions 0/97 dead transitions. [2023-08-30 10:40:15,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 97 transitions, 720 flow [2023-08-30 10:40:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 10:40:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 10:40:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11203 transitions. [2023-08-30 10:40:15,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49032738095238093 [2023-08-30 10:40:15,688 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11203 transitions. [2023-08-30 10:40:15,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11203 transitions. [2023-08-30 10:40:15,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:40:15,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11203 transitions. [2023-08-30 10:40:15,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 233.39583333333334) internal successors, (11203), 48 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:15,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 476.0) internal successors, (23324), 49 states have internal predecessors, (23324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:15,741 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 476.0) internal successors, (23324), 49 states have internal predecessors, (23324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:15,742 INFO L175 Difference]: Start difference. First operand has 109 places, 73 transitions, 346 flow. Second operand 48 states and 11203 transitions. [2023-08-30 10:40:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 97 transitions, 720 flow [2023-08-30 10:40:15,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 97 transitions, 576 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-08-30 10:40:15,749 INFO L231 Difference]: Finished difference. Result has 169 places, 97 transitions, 586 flow [2023-08-30 10:40:15,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=586, PETRI_PLACES=169, PETRI_TRANSITIONS=97} [2023-08-30 10:40:15,751 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 105 predicate places. [2023-08-30 10:40:15,751 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 97 transitions, 586 flow [2023-08-30 10:40:15,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 232.08163265306123) internal successors, (11372), 49 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:40:15,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:40:15,754 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-08-30 10:40:15,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 10:40:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:40:15,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:40:15,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:40:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1232953009, now seen corresponding path program 5 times [2023-08-30 10:40:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:40:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866188116] [2023-08-30 10:40:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:40:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:40:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:40:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:40:19,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:40:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866188116] [2023-08-30 10:40:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866188116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:40:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462971889] [2023-08-30 10:40:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 10:40:19,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:40:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:40:19,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:40:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15