./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:47:17,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:47:17,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:47:17,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:47:17,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:47:17,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:47:17,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:47:17,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:47:17,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:47:17,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:47:17,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:47:17,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:47:17,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:47:17,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:47:17,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:47:17,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:47:17,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:47:17,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:47:17,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:47:17,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:47:17,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:47:17,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:47:17,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:47:17,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:47:17,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:47:17,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:47:17,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:47:17,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:47:17,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:47:17,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:47:17,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:47:17,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:47:17,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:47:17,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:47:17,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:47:17,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:47:17,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:47:17,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:47:17,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:47:17,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:47:17,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:47:17,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:47:17,136 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:47:17,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:47:17,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:47:17,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:47:17,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:47:17,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:47:17,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:47:17,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:47:17,140 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:47:17,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:47:17,141 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:47:17,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:47:17,142 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:47:17,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:47:17,143 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:47:17,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:47:17,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:47:17,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:47:17,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:47:17,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:47:17,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:47:17,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:47:17,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:47:17,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:47:17,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:47:17,145 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:47:17,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:47:17,145 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:47:17,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:47:17,146 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:47:17,146 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:47:17,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:47:17,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:47:17,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:47:17,472 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:47:17,472 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:47:17,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2023-08-31 00:47:18,682 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:47:18,865 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:47:18,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2023-08-31 00:47:18,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79651b01/ee6ec5ac300a4569a308233a14037eff/FLAG2f84e8981 [2023-08-31 00:47:18,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79651b01/ee6ec5ac300a4569a308233a14037eff [2023-08-31 00:47:18,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:47:18,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:47:18,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:47:18,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:47:18,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:47:18,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:47:18" (1/1) ... [2023-08-31 00:47:18,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3fd2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:18, skipping insertion in model container [2023-08-31 00:47:18,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:47:18" (1/1) ... [2023-08-31 00:47:18,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:47:18,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:47:19,050 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c[1849,1862] [2023-08-31 00:47:19,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:47:19,066 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:47:19,103 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c[1849,1862] [2023-08-31 00:47:19,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:47:19,122 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:47:19,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19 WrapperNode [2023-08-31 00:47:19,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:47:19,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:47:19,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:47:19,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:47:19,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,157 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-08-31 00:47:19,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:47:19,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:47:19,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:47:19,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:47:19,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,195 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:47:19,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:47:19,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:47:19,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:47:19,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (1/1) ... [2023-08-31 00:47:19,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:47:19,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:19,235 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) [2023-08-31 00:47:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:47:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 00:47:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 00:47:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 00:47:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 00:47:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:47:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:47:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:47:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:47:19,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:47:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:47:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:47:19,277 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:47:19,265 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 [2023-08-31 00:47:19,364 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:47:19,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:47:19,487 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:47:19,493 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:47:19,493 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 00:47:19,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:47:19 BoogieIcfgContainer [2023-08-31 00:47:19,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:47:19,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:47:19,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:47:19,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:47:19,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:47:18" (1/3) ... [2023-08-31 00:47:19,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da337b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:47:19, skipping insertion in model container [2023-08-31 00:47:19,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:47:19" (2/3) ... [2023-08-31 00:47:19,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da337b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:47:19, skipping insertion in model container [2023-08-31 00:47:19,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:47:19" (3/3) ... [2023-08-31 00:47:19,502 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2023-08-31 00:47:19,509 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:47:19,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:47:19,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:47:19,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:47:19,606 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:47:19,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2023-08-31 00:47:19,697 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2023-08-31 00:47:19,697 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:47:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-31 00:47:19,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2023-08-31 00:47:19,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2023-08-31 00:47:19,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:47:19,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 146 flow [2023-08-31 00:47:19,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 146 flow [2023-08-31 00:47:19,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 146 flow [2023-08-31 00:47:19,739 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2023-08-31 00:47:19,740 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:47:19,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 6/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-31 00:47:19,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 252 [2023-08-31 00:47:21,569 INFO L134 LiptonReduction]: Checked pairs total: 297 [2023-08-31 00:47:21,569 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-31 00:47:21,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:47:21,588 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;@52c2d918, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:47:21,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 00:47:21,593 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-31 00:47:21,593 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 00:47:21,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:21,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:21,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:21,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1136073076, now seen corresponding path program 1 times [2023-08-31 00:47:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124914436] [2023-08-31 00:47:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:21,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124914436] [2023-08-31 00:47:22,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124914436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:22,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:47:22,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802194412] [2023-08-31 00:47:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:47:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:47:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:47:22,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 00:47:22,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:22,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 00:47:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:22,152 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2023-08-31 00:47:22,152 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 00:47:22,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-08-31 00:47:22,156 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-31 00:47:22,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2023-08-31 00:47:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:47:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:47:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-08-31 00:47:22,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49295774647887325 [2023-08-31 00:47:22,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-08-31 00:47:22,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-08-31 00:47:22,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:22,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-08-31 00:47:22,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,190 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 210 transitions. [2023-08-31 00:47:22,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2023-08-31 00:47:22,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 00:47:22,194 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2023-08-31 00:47:22,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2023-08-31 00:47:22,199 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-08-31 00:47:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2023-08-31 00:47:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:22,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:22,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:47:22,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:22,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1884749856, now seen corresponding path program 1 times [2023-08-31 00:47:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030542452] [2023-08-31 00:47:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:22,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030542452] [2023-08-31 00:47:22,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030542452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:22,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:22,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618659979] [2023-08-31 00:47:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:22,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 00:47:22,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:22,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 00:47:22,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:22,584 INFO L130 PetriNetUnfolder]: 39/75 cut-off events. [2023-08-31 00:47:22,584 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-31 00:47:22,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 75 events. 39/75 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 165 event pairs, 2 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 55. Up to 28 conditions per place. [2023-08-31 00:47:22,586 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 24 selfloop transitions, 6 changer transitions 4/34 dead transitions. [2023-08-31 00:47:22,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 34 transitions, 165 flow [2023-08-31 00:47:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2023-08-31 00:47:22,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44366197183098594 [2023-08-31 00:47:22,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2023-08-31 00:47:22,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2023-08-31 00:47:22,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:22,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2023-08-31 00:47:22,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,600 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 5 states and 315 transitions. [2023-08-31 00:47:22,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 34 transitions, 165 flow [2023-08-31 00:47:22,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 34 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:22,602 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 70 flow [2023-08-31 00:47:22,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-31 00:47:22,603 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-31 00:47:22,604 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 70 flow [2023-08-31 00:47:22,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:22,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:22,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:47:22,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:22,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:22,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1479151157, now seen corresponding path program 1 times [2023-08-31 00:47:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:22,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626214407] [2023-08-31 00:47:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626214407] [2023-08-31 00:47:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626214407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:22,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 00:47:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193987206] [2023-08-31 00:47:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 00:47:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 00:47:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 00:47:22,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 00:47:22,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:22,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 00:47:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:22,896 INFO L130 PetriNetUnfolder]: 32/66 cut-off events. [2023-08-31 00:47:22,897 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-31 00:47:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 66 events. 32/66 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 6 based on Foata normal form. 4/70 useless extension candidates. Maximal degree in co-relation 57. Up to 45 conditions per place. [2023-08-31 00:47:22,898 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 15 selfloop transitions, 3 changer transitions 8/26 dead transitions. [2023-08-31 00:47:22,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 142 flow [2023-08-31 00:47:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 00:47:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 00:47:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2023-08-31 00:47:22,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44190140845070425 [2023-08-31 00:47:22,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 251 transitions. [2023-08-31 00:47:22,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 251 transitions. [2023-08-31 00:47:22,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:22,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 251 transitions. [2023-08-31 00:47:22,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,903 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 70 flow. Second operand 4 states and 251 transitions. [2023-08-31 00:47:22,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 142 flow [2023-08-31 00:47:22,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 26 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:22,904 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 62 flow [2023-08-31 00:47:22,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-31 00:47:22,905 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2023-08-31 00:47:22,905 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 62 flow [2023-08-31 00:47:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:22,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:22,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:47:22,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:22,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1582616416, now seen corresponding path program 2 times [2023-08-31 00:47:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:22,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645883788] [2023-08-31 00:47:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:22,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:22,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645883788] [2023-08-31 00:47:22,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645883788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:22,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095983618] [2023-08-31 00:47:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:47:22,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:22,993 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) [2023-08-31 00:47:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:47:23,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:47:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:47:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 00:47:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:23,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:23,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095983618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:23,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:47:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246980853] [2023-08-31 00:47:23,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:47:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:47:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:47:23,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 00:47:23,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:23,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:23,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 00:47:23,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:23,600 INFO L130 PetriNetUnfolder]: 34/63 cut-off events. [2023-08-31 00:47:23,600 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-31 00:47:23,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 63 events. 34/63 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 4 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 49. Up to 39 conditions per place. [2023-08-31 00:47:23,601 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 22 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2023-08-31 00:47:23,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 155 flow [2023-08-31 00:47:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 310 transitions. [2023-08-31 00:47:23,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43661971830985913 [2023-08-31 00:47:23,603 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 310 transitions. [2023-08-31 00:47:23,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 310 transitions. [2023-08-31 00:47:23,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:23,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 310 transitions. [2023-08-31 00:47:23,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:23,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:23,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:23,607 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 62 flow. Second operand 5 states and 310 transitions. [2023-08-31 00:47:23,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 155 flow [2023-08-31 00:47:23,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 28 transitions, 147 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 00:47:23,608 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 91 flow [2023-08-31 00:47:23,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-31 00:47:23,609 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-08-31 00:47:23,609 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 91 flow [2023-08-31 00:47:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:23,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:23,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:23,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:47:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:23,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:23,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash 410010517, now seen corresponding path program 2 times [2023-08-31 00:47:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:23,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386303185] [2023-08-31 00:47:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:23,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:23,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:23,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386303185] [2023-08-31 00:47:23,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386303185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:47:23,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:47:23,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 00:47:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638512930] [2023-08-31 00:47:23,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:47:23,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 00:47:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 00:47:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:47:23,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-31 00:47:24,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 56.4) internal successors, (282), 5 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:24,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:24,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-31 00:47:24,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:24,063 INFO L130 PetriNetUnfolder]: 40/73 cut-off events. [2023-08-31 00:47:24,063 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-31 00:47:24,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 73 events. 40/73 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 4/77 useless extension candidates. Maximal degree in co-relation 119. Up to 61 conditions per place. [2023-08-31 00:47:24,064 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 21 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2023-08-31 00:47:24,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 178 flow [2023-08-31 00:47:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:47:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:47:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2023-08-31 00:47:24,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169014084507042 [2023-08-31 00:47:24,066 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 296 transitions. [2023-08-31 00:47:24,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 296 transitions. [2023-08-31 00:47:24,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:47:24,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 296 transitions. [2023-08-31 00:47:24,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:24,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:24,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:24,070 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 91 flow. Second operand 5 states and 296 transitions. [2023-08-31 00:47:24,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 178 flow [2023-08-31 00:47:24,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 173 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:47:24,072 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 127 flow [2023-08-31 00:47:24,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-31 00:47:24,073 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 12 predicate places. [2023-08-31 00:47:24,073 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 127 flow [2023-08-31 00:47:24,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.4) internal successors, (282), 5 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:24,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:47:24,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:47:24,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:47:24,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:47:24,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:47:24,075 INFO L85 PathProgramCache]: Analyzing trace with hash 656812837, now seen corresponding path program 1 times [2023-08-31 00:47:24,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:47:24,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085211815] [2023-08-31 00:47:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:24,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:47:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:24,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:47:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085211815] [2023-08-31 00:47:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085211815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:47:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071740704] [2023-08-31 00:47:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:47:24,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:47:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:47:24,373 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) [2023-08-31 00:47:24,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:47:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:47:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 00:47:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:47:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:32,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:47:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:47:35,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071740704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:47:35,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:47:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-31 00:47:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692428165] [2023-08-31 00:47:35,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:47:35,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 00:47:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:47:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 00:47:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=147, Unknown=2, NotChecked=0, Total=210 [2023-08-31 00:47:37,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:47:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-31 00:47:38,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 127 flow. Second operand has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:47:38,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:47:38,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-31 00:47:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:47:50,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:47:52,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:47:56,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:04,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:11,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:14,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:16,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:18,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:34,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:36,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:37,982 INFO L130 PetriNetUnfolder]: 150/290 cut-off events. [2023-08-31 00:48:37,982 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-08-31 00:48:37,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 290 events. 150/290 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1104 event pairs, 4 based on Foata normal form. 13/303 useless extension candidates. Maximal degree in co-relation 568. Up to 101 conditions per place. [2023-08-31 00:48:37,986 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 64 selfloop transitions, 30 changer transitions 19/113 dead transitions. [2023-08-31 00:48:37,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 113 transitions, 780 flow [2023-08-31 00:48:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 00:48:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 00:48:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1028 transitions. [2023-08-31 00:48:37,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258492129246065 [2023-08-31 00:48:37,989 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1028 transitions. [2023-08-31 00:48:37,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1028 transitions. [2023-08-31 00:48:37,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:48:37,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1028 transitions. [2023-08-31 00:48:37,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.470588235294116) internal successors, (1028), 17 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:37,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:37,996 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:37,996 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 127 flow. Second operand 17 states and 1028 transitions. [2023-08-31 00:48:37,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 113 transitions, 780 flow [2023-08-31 00:48:38,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 113 transitions, 753 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-31 00:48:38,002 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 447 flow [2023-08-31 00:48:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=447, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-31 00:48:38,003 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 37 predicate places. [2023-08-31 00:48:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 447 flow [2023-08-31 00:48:38,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:38,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:48:38,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:48:38,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 00:48:38,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 00:48:38,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:48:38,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:48:38,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1905891163, now seen corresponding path program 2 times [2023-08-31 00:48:38,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:48:38,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725919837] [2023-08-31 00:48:38,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:48:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:48:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:48:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:48:38,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:48:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725919837] [2023-08-31 00:48:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725919837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:48:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247191341] [2023-08-31 00:48:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:48:38,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:48:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:48:38,509 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) [2023-08-31 00:48:38,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:48:38,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:48:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:48:38,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 00:48:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:48:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:48:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:48:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:48:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247191341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:48:49,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:48:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-31 00:48:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719319660] [2023-08-31 00:48:49,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:48:49,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 00:48:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:48:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 00:48:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2023-08-31 00:48:50,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:53,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:53,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-31 00:48:53,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 447 flow. Second operand has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:48:53,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:48:53,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-31 00:48:53,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:48:56,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:48:59,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:21,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:22,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:34,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:37,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:49,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:51,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:49:53,001 INFO L130 PetriNetUnfolder]: 229/448 cut-off events. [2023-08-31 00:49:53,001 INFO L131 PetriNetUnfolder]: For 3557/3557 co-relation queries the response was YES. [2023-08-31 00:49:53,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 448 events. 229/448 cut-off events. For 3557/3557 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2014 event pairs, 24 based on Foata normal form. 5/453 useless extension candidates. Maximal degree in co-relation 2365. Up to 241 conditions per place. [2023-08-31 00:49:53,006 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 96 selfloop transitions, 34 changer transitions 13/143 dead transitions. [2023-08-31 00:49:53,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 143 transitions, 1337 flow [2023-08-31 00:49:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 00:49:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 00:49:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1086 transitions. [2023-08-31 00:49:53,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42488262910798125 [2023-08-31 00:49:53,010 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1086 transitions. [2023-08-31 00:49:53,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1086 transitions. [2023-08-31 00:49:53,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:49:53,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1086 transitions. [2023-08-31 00:49:53,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.333333333333336) internal successors, (1086), 18 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:53,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:53,017 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:53,017 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 447 flow. Second operand 18 states and 1086 transitions. [2023-08-31 00:49:53,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 143 transitions, 1337 flow [2023-08-31 00:49:53,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 143 transitions, 1166 flow, removed 83 selfloop flow, removed 3 redundant places. [2023-08-31 00:49:53,033 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 769 flow [2023-08-31 00:49:53,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=769, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-08-31 00:49:53,034 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 60 predicate places. [2023-08-31 00:49:53,034 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 769 flow [2023-08-31 00:49:53,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:49:53,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:49:53,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:49:53,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 00:49:53,240 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 [2023-08-31 00:49:53,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:49:53,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:49:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -968434293, now seen corresponding path program 3 times [2023-08-31 00:49:53,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:49:53,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542286798] [2023-08-31 00:49:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:49:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:49:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:49:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:49:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:49:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542286798] [2023-08-31 00:49:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542286798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:49:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122333302] [2023-08-31 00:49:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 00:49:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:49:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:49:53,413 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) [2023-08-31 00:49:53,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:50:33,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 00:50:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:50:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 00:50:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:50:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:50:33,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:50:33,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122333302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:50:33,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:50:33,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-08-31 00:50:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791993022] [2023-08-31 00:50:33,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:50:33,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:50:33,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:50:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:50:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:50:33,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 00:50:33,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 769 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:33,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:50:33,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 00:50:33,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:50:33,987 INFO L130 PetriNetUnfolder]: 115/227 cut-off events. [2023-08-31 00:50:33,987 INFO L131 PetriNetUnfolder]: For 3123/3123 co-relation queries the response was YES. [2023-08-31 00:50:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 227 events. 115/227 cut-off events. For 3123/3123 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 802 event pairs, 24 based on Foata normal form. 4/231 useless extension candidates. Maximal degree in co-relation 1428. Up to 223 conditions per place. [2023-08-31 00:50:33,991 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 47 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-31 00:50:33,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 665 flow [2023-08-31 00:50:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:50:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:50:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-31 00:50:33,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47417840375586856 [2023-08-31 00:50:33,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-31 00:50:33,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-31 00:50:33,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:50:33,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-31 00:50:33,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:33,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:33,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:33,995 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 769 flow. Second operand 3 states and 202 transitions. [2023-08-31 00:50:33,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 665 flow [2023-08-31 00:50:34,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 382 flow, removed 133 selfloop flow, removed 17 redundant places. [2023-08-31 00:50:34,002 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 286 flow [2023-08-31 00:50:34,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-08-31 00:50:34,005 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-08-31 00:50:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 286 flow [2023-08-31 00:50:34,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:50:34,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:50:34,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:50:34,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:50:34,219 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 [2023-08-31 00:50:34,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:50:34,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:50:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 906094592, now seen corresponding path program 4 times [2023-08-31 00:50:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:50:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039504938] [2023-08-31 00:50:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:50:34,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:50:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:50:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:50:35,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:50:35,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039504938] [2023-08-31 00:50:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039504938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:50:35,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774928352] [2023-08-31 00:50:35,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 00:50:35,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:50:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:50:35,186 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) [2023-08-31 00:50:35,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:51:46,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 00:51:46,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:51:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 00:51:46,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:51:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:51:54,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:52:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:52:48,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774928352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:52:48,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:52:48,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 16 [2023-08-31 00:52:48,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556218338] [2023-08-31 00:52:48,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:52:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 00:52:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:52:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 00:52:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=199, Unknown=12, NotChecked=0, Total=272 [2023-08-31 00:52:50,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:52:52,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:52:54,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:52:56,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:52:58,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:00,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:02,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:04,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:04,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 142 [2023-08-31 00:53:04,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 286 flow. Second operand has 17 states, 17 states have (on average 51.23529411764706) internal successors, (871), 17 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:53:04,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:53:04,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 142 [2023-08-31 00:53:04,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:53:06,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:53,996 WARN L222 SmtUtils]: Spent 44.89s on a formula simplification. DAG size of input: 62 DAG size of output: 18 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:53:56,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:57,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:53:59,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:54:01,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:54:03,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:54:45,527 WARN L222 SmtUtils]: Spent 33.80s on a formula simplification. DAG size of input: 66 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:54:51,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:56:48,473 WARN L222 SmtUtils]: Spent 1.68m on a formula simplification. DAG size of input: 102 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:56:49,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:56:51,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:56:54,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:56:56,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:56:59,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:06,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:08,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:10,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:12,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:14,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:16,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:18,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:29,804 WARN L222 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 69 DAG size of output: 30 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 00:57:38,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:40,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:42,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:44,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:46,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:48,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:50,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:52,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:54,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:56,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:57:58,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:00,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:08,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:10,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:12,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:14,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:16,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:18,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:21,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:23,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:25,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:27,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:30,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:32,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:34,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:36,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:38,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:40,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:43,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:45,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:47,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:49,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:51,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:53,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:55,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:58:57,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:17,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:20,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:33,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:35,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:37,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:40,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:42,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:44,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:46,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:48,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:49,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 00:59:51,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:00:00,515 INFO L130 PetriNetUnfolder]: 178/385 cut-off events. [2023-08-31 01:00:00,515 INFO L131 PetriNetUnfolder]: For 1667/1667 co-relation queries the response was YES. [2023-08-31 01:00:00,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 385 events. 178/385 cut-off events. For 1667/1667 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1880 event pairs, 2 based on Foata normal form. 9/394 useless extension candidates. Maximal degree in co-relation 1117. Up to 148 conditions per place. [2023-08-31 01:00:00,517 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 66 selfloop transitions, 50 changer transitions 12/128 dead transitions. [2023-08-31 01:00:00,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 128 transitions, 1016 flow [2023-08-31 01:00:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:00:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:00:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1077 transitions. [2023-08-31 01:00:00,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37922535211267605 [2023-08-31 01:00:00,521 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1077 transitions. [2023-08-31 01:00:00,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1077 transitions. [2023-08-31 01:00:00,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:00,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1077 transitions. [2023-08-31 01:00:00,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,528 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,529 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 286 flow. Second operand 20 states and 1077 transitions. [2023-08-31 01:00:00,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 128 transitions, 1016 flow [2023-08-31 01:00:00,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 01:00:00,535 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 662 flow [2023-08-31 01:00:00,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=662, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-31 01:00:00,536 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 58 predicate places. [2023-08-31 01:00:00,536 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 662 flow [2023-08-31 01:00:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 51.23529411764706) internal successors, (871), 17 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:00,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:00,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:00,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 01:00:00,746 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 [2023-08-31 01:00:00,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:00:00,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash -164628480, now seen corresponding path program 5 times [2023-08-31 01:00:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412104224] [2023-08-31 01:00:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:00,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:00,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412104224] [2023-08-31 01:00:00,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412104224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061876431] [2023-08-31 01:00:00,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:00:00,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:00,921 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) [2023-08-31 01:00:00,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:00:01,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:00:01,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:00:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:00:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:00:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:00:01,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:00:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061876431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:00:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:00:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-31 01:00:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915720552] [2023-08-31 01:00:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:00:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:00:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:00:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:00:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:00:01,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 01:00:01,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 662 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:00:01,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 01:00:01,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:00:01,911 INFO L130 PetriNetUnfolder]: 60/129 cut-off events. [2023-08-31 01:00:01,911 INFO L131 PetriNetUnfolder]: For 921/921 co-relation queries the response was YES. [2023-08-31 01:00:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 129 events. 60/129 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 363 event pairs, 4 based on Foata normal form. 2/131 useless extension candidates. Maximal degree in co-relation 694. Up to 122 conditions per place. [2023-08-31 01:00:01,912 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 41 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-31 01:00:01,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 478 flow [2023-08-31 01:00:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:00:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:00:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-08-31 01:00:01,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830985915492956 [2023-08-31 01:00:01,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-08-31 01:00:01,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-08-31 01:00:01,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:00:01,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-08-31 01:00:01,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,917 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 662 flow. Second operand 4 states and 266 transitions. [2023-08-31 01:00:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 478 flow [2023-08-31 01:00:01,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 345 flow, removed 54 selfloop flow, removed 15 redundant places. [2023-08-31 01:00:01,920 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 259 flow [2023-08-31 01:00:01,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-08-31 01:00:01,921 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-08-31 01:00:01,921 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 259 flow [2023-08-31 01:00:01,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:00:01,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:00:01,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:00:01,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 01:00:02,130 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 [2023-08-31 01:00:02,130 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:00:02,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:00:02,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1403231227, now seen corresponding path program 6 times [2023-08-31 01:00:02,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:00:02,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243369471] [2023-08-31 01:00:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:00:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:00:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:00:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:00:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:00:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243369471] [2023-08-31 01:00:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243369471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:00:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846978783] [2023-08-31 01:00:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:00:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:00:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:00:02,756 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) [2023-08-31 01:00:02,758 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