/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:01:04,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:01:04,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:01:04,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:01:04,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:01:04,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:01:04,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:01:04,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:01:04,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:01:04,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:01:04,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:01:04,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:01:04,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:01:04,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:01:04,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:01:04,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:01:04,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:01:04,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:01:04,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:01:04,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:01:04,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:01:04,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:01:04,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:01:04,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:01:04,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 09:01:04,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 09:01:04,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 09:01:04,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 09:01:04,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 09:01:04,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 09:01:04,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 09:01:04,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 09:01:04,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 09:01:04,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 09:01:04,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 09:01:04,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 09:01:04,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 09:01:04,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 09:01:04,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:01:04,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:01:04,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:01:04,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 09:01:04,281 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:01:04,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:01:04,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:01:04,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:01:04,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:01:04,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:01:04,283 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:01:04,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:01:04,283 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:01:04,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:01:04,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:01:04,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:01:04,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:01:04,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:01:04,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:01:04,286 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:01:04,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:01:04,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:01:04,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:01:04,496 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:01:04,496 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:01:04,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-28 09:01:05,530 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:01:05,743 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:01:05,743 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-28 09:01:05,748 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814e240f3/ae6ddf56833a4c40910980fcbc58ecd3/FLAGeacb8965c [2023-01-28 09:01:05,757 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814e240f3/ae6ddf56833a4c40910980fcbc58ecd3 [2023-01-28 09:01:05,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:01:05,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:01:05,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:01:05,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:01:05,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:01:05,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:01:05" (1/1) ... [2023-01-28 09:01:05,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbe5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:05, skipping insertion in model container [2023-01-28 09:01:05,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:01:05" (1/1) ... [2023-01-28 09:01:05,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:01:05,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:01:05,957 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-28 09:01:05,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:01:05,973 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:01:06,005 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-28 09:01:06,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:01:06,018 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:01:06,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06 WrapperNode [2023-01-28 09:01:06,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:01:06,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:01:06,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:01:06,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:01:06,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,071 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-01-28 09:01:06,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:01:06,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:01:06,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:01:06,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:01:06,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:01:06,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:01:06,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:01:06,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:01:06,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (1/1) ... [2023-01-28 09:01:06,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:01:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:06,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 09:01:06,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 09:01:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:01:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:01:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:01:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:01:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:01:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:01:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:01:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:01:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 09:01:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 09:01:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:01:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 09:01:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:01:06,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:01:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:01:06,198 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 09:01:06,291 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:01:06,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:01:06,658 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:01:06,666 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:01:06,666 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 09:01:06,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:01:06 BoogieIcfgContainer [2023-01-28 09:01:06,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:01:06,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:01:06,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:01:06,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:01:06,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:01:05" (1/3) ... [2023-01-28 09:01:06,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b92a259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:01:06, skipping insertion in model container [2023-01-28 09:01:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:01:06" (2/3) ... [2023-01-28 09:01:06,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b92a259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:01:06, skipping insertion in model container [2023-01-28 09:01:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:01:06" (3/3) ... [2023-01-28 09:01:06,673 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-01-28 09:01:06,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:01:06,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:01:06,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:01:06,801 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 09:01:06,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-01-28 09:01:06,965 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-01-28 09:01:06,965 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:01:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-28 09:01:06,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-01-28 09:01:06,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-01-28 09:01:06,983 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:01:06,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-28 09:01:06,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-28 09:01:06,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-01-28 09:01:07,036 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-01-28 09:01:07,036 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:01:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-28 09:01:07,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-01-28 09:01:15,606 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-01-28 09:01:15,607 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-01-28 09:01:15,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:01:15,628 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24db7c5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:01:15,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 09:01:15,633 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-28 09:01:15,634 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:01:15,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:15,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:15,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:15,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-01-28 09:01:15,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:15,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952176618] [2023-01-28 09:01:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:01:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952176618] [2023-01-28 09:01:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952176618] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:01:16,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:01:16,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 09:01:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331314831] [2023-01-28 09:01:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:01:16,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 09:01:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 09:01:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 09:01:16,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-28 09:01:16,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:16,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-28 09:01:16,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:16,130 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-01-28 09:01:16,130 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-28 09:01:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-01-28 09:01:16,133 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-01-28 09:01:16,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-01-28 09:01:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 09:01:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 09:01:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 995 transitions. [2023-01-28 09:01:16,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301772589710333 [2023-01-28 09:01:16,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 995 transitions. [2023-01-28 09:01:16,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 995 transitions. [2023-01-28 09:01:16,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:16,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 995 transitions. [2023-01-28 09:01:16,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,171 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 995 transitions. [2023-01-28 09:01:16,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-01-28 09:01:16,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 09:01:16,176 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-01-28 09:01:16,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-01-28 09:01:16,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-28 09:01:16,183 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-01-28 09:01:16,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:16,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:16,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:01:16,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:16,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-01-28 09:01:16,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:16,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759150005] [2023-01-28 09:01:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:01:16,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759150005] [2023-01-28 09:01:16,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759150005] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638701127] [2023-01-28 09:01:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:16,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:16,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 09:01:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:01:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:01:16,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:01:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638701127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:16,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 09:01:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434196368] [2023-01-28 09:01:16,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:16,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 09:01:16,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 09:01:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 09:01:16,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-28 09:01:16,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:16,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-28 09:01:16,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:16,626 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-01-28 09:01:16,627 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:01:16,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-01-28 09:01:16,628 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-01-28 09:01:16,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-01-28 09:01:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:01:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:01:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1644 transitions. [2023-01-28 09:01:16,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264591439688716 [2023-01-28 09:01:16,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1644 transitions. [2023-01-28 09:01:16,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1644 transitions. [2023-01-28 09:01:16,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:16,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1644 transitions. [2023-01-28 09:01:16,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 328.8) internal successors, (1644), 5 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,642 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1644 transitions. [2023-01-28 09:01:16,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-01-28 09:01:16,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 09:01:16,643 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-01-28 09:01:16,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-28 09:01:16,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 09:01:16,644 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-01-28 09:01:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:16,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:16,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:16,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 09:01:16,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:16,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:16,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-01-28 09:01:16,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:16,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560108939] [2023-01-28 09:01:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:17,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:17,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560108939] [2023-01-28 09:01:17,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560108939] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:01:17,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:01:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:01:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392104741] [2023-01-28 09:01:17,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:01:17,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:01:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:01:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:01:17,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 771 [2023-01-28 09:01:17,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:17,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 771 [2023-01-28 09:01:17,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:17,312 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-01-28 09:01:17,312 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 09:01:17,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-01-28 09:01:17,315 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-01-28 09:01:17,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-01-28 09:01:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:01:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:01:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1194 transitions. [2023-01-28 09:01:17,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38715953307393 [2023-01-28 09:01:17,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1194 transitions. [2023-01-28 09:01:17,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1194 transitions. [2023-01-28 09:01:17,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:17,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1194 transitions. [2023-01-28 09:01:17,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,325 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1194 transitions. [2023-01-28 09:01:17,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-01-28 09:01:17,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 09:01:17,328 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-01-28 09:01:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-01-28 09:01:17,329 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-01-28 09:01:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-01-28 09:01:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:17,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:17,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 09:01:17,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:17,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-01-28 09:01:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528063388] [2023-01-28 09:01:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:17,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528063388] [2023-01-28 09:01:17,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528063388] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:01:17,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:01:17,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:01:17,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886258544] [2023-01-28 09:01:17,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:01:17,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:01:17,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:01:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:01:17,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 771 [2023-01-28 09:01:17,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:17,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 771 [2023-01-28 09:01:17,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:17,780 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-01-28 09:01:17,780 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-01-28 09:01:17,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-01-28 09:01:17,783 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-01-28 09:01:17,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-01-28 09:01:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:01:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:01:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1232 transitions. [2023-01-28 09:01:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39948119325551235 [2023-01-28 09:01:17,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1232 transitions. [2023-01-28 09:01:17,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1232 transitions. [2023-01-28 09:01:17,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:17,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1232 transitions. [2023-01-28 09:01:17,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,794 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1232 transitions. [2023-01-28 09:01:17,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-01-28 09:01:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 09:01:17,795 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-01-28 09:01:17,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-01-28 09:01:17,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 09:01:17,796 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-01-28 09:01:17,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:17,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:17,797 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 09:01:17,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:17,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-01-28 09:01:17,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:17,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001789723] [2023-01-28 09:01:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:01:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001789723] [2023-01-28 09:01:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001789723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186608585] [2023-01-28 09:01:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:19,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:19,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:19,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 09:01:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:19,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 09:01:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:19,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 138 [2023-01-28 09:01:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:20,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:21,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:21,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 108 [2023-01-28 09:01:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186608585] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:21,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:21,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-01-28 09:01:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900832488] [2023-01-28 09:01:21,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:21,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 09:01:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 09:01:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 09:01:21,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 771 [2023-01-28 09:01:21,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:21,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:21,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 771 [2023-01-28 09:01:21,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:42,046 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-01-28 09:01:42,047 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-01-28 09:01:42,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-01-28 09:01:42,066 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-01-28 09:01:42,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-01-28 09:01:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-01-28 09:01:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-01-28 09:01:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 26585 transitions. [2023-01-28 09:01:42,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3078677969242172 [2023-01-28 09:01:42,111 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 26585 transitions. [2023-01-28 09:01:42,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 26585 transitions. [2023-01-28 09:01:42,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:42,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 26585 transitions. [2023-01-28 09:01:42,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 237.36607142857142) internal successors, (26585), 112 states have internal predecessors, (26585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:42,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:42,291 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:42,291 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 26585 transitions. [2023-01-28 09:01:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-01-28 09:01:42,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-01-28 09:01:42,306 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-01-28 09:01:42,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-01-28 09:01:42,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-01-28 09:01:42,307 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-01-28 09:01:42,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:42,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:42,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:42,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 09:01:42,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:42,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:42,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-01-28 09:01:42,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:42,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135241418] [2023-01-28 09:01:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:42,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:01:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:43,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:01:43,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135241418] [2023-01-28 09:01:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135241418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:01:43,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695343926] [2023-01-28 09:01:43,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:01:43,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:01:43,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:01:43,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 09:01:43,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:01:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:01:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 09:01:43,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:01:43,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:01:43,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2023-01-28 09:01:44,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-01-28 09:01:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:44,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:01:45,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:01:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 139 [2023-01-28 09:01:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-01-28 09:01:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:01:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695343926] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:01:45,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:01:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 09:01:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810766997] [2023-01-28 09:01:45,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:01:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 09:01:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:01:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 09:01:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-01-28 09:01:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 09:01:45,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:45,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:01:45,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 09:01:45,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:01:57,628 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-01-28 09:01:57,628 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-01-28 09:01:57,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-01-28 09:01:57,764 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-01-28 09:01:57,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-01-28 09:01:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 09:01:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 09:01:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-01-28 09:01:57,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-01-28 09:01:57,776 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-01-28 09:01:57,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-01-28 09:01:57,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:01:57,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-01-28 09:01:57,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:57,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:57,830 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:57,830 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-01-28 09:01:57,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-01-28 09:01:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-01-28 09:01:59,206 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-01-28 09:01:59,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-01-28 09:01:59,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-01-28 09:01:59,207 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-01-28 09:01:59,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:01:59,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:01:59,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:01:59,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 09:01:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:01:59,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:01:59,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:01:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-01-28 09:01:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:01:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69255313] [2023-01-28 09:01:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:01:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:01:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:00,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69255313] [2023-01-28 09:02:00,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69255313] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:00,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997578318] [2023-01-28 09:02:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:02:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:00,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:00,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 09:02:00,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:02:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:02:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 09:02:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:00,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 89 [2023-01-28 09:02:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:00,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:01,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:01,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 76 [2023-01-28 09:02:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997578318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:01,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:01,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-28 09:02:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046495727] [2023-01-28 09:02:01,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:01,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:02:01,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:02:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:02:01,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 771 [2023-01-28 09:02:01,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:01,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:01,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 771 [2023-01-28 09:02:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:06,418 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-01-28 09:02:06,419 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-01-28 09:02:06,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-01-28 09:02:06,561 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-01-28 09:02:06,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-01-28 09:02:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 09:02:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 09:02:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7750 transitions. [2023-01-28 09:02:06,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346616574980992 [2023-01-28 09:02:06,567 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7750 transitions. [2023-01-28 09:02:06,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7750 transitions. [2023-01-28 09:02:06,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:06,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7750 transitions. [2023-01-28 09:02:06,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 267.2413793103448) internal successors, (7750), 29 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:06,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:06,586 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:06,586 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 7750 transitions. [2023-01-28 09:02:06,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-01-28 09:02:29,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-01-28 09:02:29,592 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-01-28 09:02:29,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-01-28 09:02:29,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-01-28 09:02:29,593 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-01-28 09:02:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:29,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:02:29,594 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:02:29,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 09:02:29,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:29,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:02:29,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:02:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-01-28 09:02:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:02:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508505786] [2023-01-28 09:02:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:02:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:02:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:30,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508505786] [2023-01-28 09:02:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508505786] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213864819] [2023-01-28 09:02:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:02:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:30,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:30,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 09:02:30,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:02:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:02:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 09:02:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:02:30,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-01-28 09:02:30,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 81 [2023-01-28 09:02:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:31,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:32,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:32,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 132 [2023-01-28 09:02:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-01-28 09:02:32,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-01-28 09:02:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213864819] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:32,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:32,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-01-28 09:02:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169568761] [2023-01-28 09:02:32,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:32,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 09:02:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 09:02:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=928, Unknown=19, NotChecked=0, Total=1056 [2023-01-28 09:02:32,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 09:02:32,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:32,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:32,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 09:02:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:02:43,865 INFO L130 PetriNetUnfolder]: 13942/22118 cut-off events. [2023-01-28 09:02:43,865 INFO L131 PetriNetUnfolder]: For 243772/243772 co-relation queries the response was YES. [2023-01-28 09:02:44,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120382 conditions, 22118 events. 13942/22118 cut-off events. For 243772/243772 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 159485 event pairs, 1693 based on Foata normal form. 21/20315 useless extension candidates. Maximal degree in co-relation 120274. Up to 4592 conditions per place. [2023-01-28 09:02:44,342 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1215 selfloop transitions, 693 changer transitions 73/1981 dead transitions. [2023-01-28 09:02:44,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1981 transitions, 22237 flow [2023-01-28 09:02:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 09:02:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 09:02:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 9387 transitions. [2023-01-28 09:02:44,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.320397296743805 [2023-01-28 09:02:44,352 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 9387 transitions. [2023-01-28 09:02:44,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 9387 transitions. [2023-01-28 09:02:44,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:02:44,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 9387 transitions. [2023-01-28 09:02:44,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 247.02631578947367) internal successors, (9387), 38 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:44,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:44,384 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:44,384 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 38 states and 9387 transitions. [2023-01-28 09:02:44,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1981 transitions, 22237 flow [2023-01-28 09:02:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1981 transitions, 21793 flow, removed 186 selfloop flow, removed 8 redundant places. [2023-01-28 09:02:46,861 INFO L231 Difference]: Finished difference. Result has 344 places, 1262 transitions, 13766 flow [2023-01-28 09:02:46,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13766, PETRI_PLACES=344, PETRI_TRANSITIONS=1262} [2023-01-28 09:02:46,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2023-01-28 09:02:46,862 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1262 transitions, 13766 flow [2023-01-28 09:02:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:46,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:02:46,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:02:46,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 09:02:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:47,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:02:47,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:02:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-01-28 09:02:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:02:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778972157] [2023-01-28 09:02:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:02:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:02:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:02:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:02:48,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:02:48,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778972157] [2023-01-28 09:02:48,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778972157] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:02:48,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566081929] [2023-01-28 09:02:48,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:02:48,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:02:48,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:02:48,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:02:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 09:02:48,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:02:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:02:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:02:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:02:48,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2023-01-28 09:02:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:02:48,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:02:48,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-01-28 09:02:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:02:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566081929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:02:49,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:02:49,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-01-28 09:02:49,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906584387] [2023-01-28 09:02:49,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:02:49,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 09:02:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:02:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 09:02:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-01-28 09:02:49,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 09:02:49,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1262 transitions, 13766 flow. Second operand has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:02:49,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:02:49,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 09:02:49,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:03:00,806 INFO L130 PetriNetUnfolder]: 17917/29495 cut-off events. [2023-01-28 09:03:00,806 INFO L131 PetriNetUnfolder]: For 410292/410292 co-relation queries the response was YES. [2023-01-28 09:03:01,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178763 conditions, 29495 events. 17917/29495 cut-off events. For 410292/410292 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 235297 event pairs, 3142 based on Foata normal form. 64/26993 useless extension candidates. Maximal degree in co-relation 178623. Up to 10768 conditions per place. [2023-01-28 09:03:01,586 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1580 selfloop transitions, 715 changer transitions 27/2322 dead transitions. [2023-01-28 09:03:01,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2322 transitions, 30986 flow [2023-01-28 09:03:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 09:03:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 09:03:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10122 transitions. [2023-01-28 09:03:01,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202049919331878 [2023-01-28 09:03:01,595 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10122 transitions. [2023-01-28 09:03:01,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10122 transitions. [2023-01-28 09:03:01,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:03:01,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10122 transitions. [2023-01-28 09:03:01,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 246.8780487804878) internal successors, (10122), 41 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:01,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:01,641 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:01,642 INFO L175 Difference]: Start difference. First operand has 344 places, 1262 transitions, 13766 flow. Second operand 41 states and 10122 transitions. [2023-01-28 09:03:01,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2322 transitions, 30986 flow [2023-01-28 09:03:08,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2322 transitions, 28322 flow, removed 1304 selfloop flow, removed 8 redundant places. [2023-01-28 09:03:08,909 INFO L231 Difference]: Finished difference. Result has 400 places, 1578 transitions, 19480 flow [2023-01-28 09:03:08,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12694, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19480, PETRI_PLACES=400, PETRI_TRANSITIONS=1578} [2023-01-28 09:03:08,910 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2023-01-28 09:03:08,910 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1578 transitions, 19480 flow [2023-01-28 09:03:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:08,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:03:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:03:08,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 09:03:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:09,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:03:09,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:03:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1440443928, now seen corresponding path program 6 times [2023-01-28 09:03:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:03:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219486223] [2023-01-28 09:03:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:03:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:03:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:03:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:03:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:03:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219486223] [2023-01-28 09:03:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219486223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:03:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386726445] [2023-01-28 09:03:10,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:03:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:03:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:03:10,019 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) [2023-01-28 09:03:10,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 09:03:10,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:03:10,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:03:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 09:03:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:03:10,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 09:03:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:03:10,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:03:10,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:03:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-01-28 09:03:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:03:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386726445] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:03:10,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:03:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2023-01-28 09:03:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267382673] [2023-01-28 09:03:10,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:03:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 09:03:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:03:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 09:03:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-01-28 09:03:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 771 [2023-01-28 09:03:10,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1578 transitions, 19480 flow. Second operand has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:10,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:03:10,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 771 [2023-01-28 09:03:10,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:03:36,907 INFO L130 PetriNetUnfolder]: 39088/64313 cut-off events. [2023-01-28 09:03:36,907 INFO L131 PetriNetUnfolder]: For 1186605/1186605 co-relation queries the response was YES. [2023-01-28 09:03:38,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438989 conditions, 64313 events. 39088/64313 cut-off events. For 1186605/1186605 co-relation queries the response was YES. Maximal size of possible extension queue 3353. Compared 567099 event pairs, 9553 based on Foata normal form. 32/58817 useless extension candidates. Maximal degree in co-relation 437467. Up to 20579 conditions per place. [2023-01-28 09:03:39,157 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 3528 selfloop transitions, 827 changer transitions 0/4355 dead transitions. [2023-01-28 09:03:39,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 4355 transitions, 63280 flow [2023-01-28 09:03:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 09:03:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 09:03:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 13458 transitions. [2023-01-28 09:03:39,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32324542441273957 [2023-01-28 09:03:39,166 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 13458 transitions. [2023-01-28 09:03:39,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 13458 transitions. [2023-01-28 09:03:39,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:03:39,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 13458 transitions. [2023-01-28 09:03:39,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 249.22222222222223) internal successors, (13458), 54 states have internal predecessors, (13458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:39,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:39,199 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:03:39,199 INFO L175 Difference]: Start difference. First operand has 400 places, 1578 transitions, 19480 flow. Second operand 54 states and 13458 transitions. [2023-01-28 09:03:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 4355 transitions, 63280 flow [2023-01-28 09:04:17,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 4355 transitions, 60299 flow, removed 1396 selfloop flow, removed 13 redundant places. [2023-01-28 09:04:17,457 INFO L231 Difference]: Finished difference. Result has 472 places, 2136 transitions, 28870 flow [2023-01-28 09:04:17,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=18445, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=28870, PETRI_PLACES=472, PETRI_TRANSITIONS=2136} [2023-01-28 09:04:17,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2023-01-28 09:04:17,459 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 2136 transitions, 28870 flow [2023-01-28 09:04:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:04:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:04:17,460 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:04:17,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 09:04:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:17,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:04:17,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:04:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1001808469, now seen corresponding path program 7 times [2023-01-28 09:04:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:04:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609281849] [2023-01-28 09:04:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:04:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:04:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:04:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:04:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609281849] [2023-01-28 09:04:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609281849] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:04:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328387801] [2023-01-28 09:04:18,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:04:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:04:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:04:18,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:04:18,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 09:04:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:04:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 09:04:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:04:18,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 97 [2023-01-28 09:04:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:04:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:04:19,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:04:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 60 [2023-01-28 09:04:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:04:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328387801] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:04:19,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:04:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-01-28 09:04:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99567250] [2023-01-28 09:04:19,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:04:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 09:04:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:04:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 09:04:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-01-28 09:04:19,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 771 [2023-01-28 09:04:19,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 2136 transitions, 28870 flow. Second operand has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:04:19,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:04:19,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 771 [2023-01-28 09:04:19,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:05:15,952 INFO L130 PetriNetUnfolder]: 62594/106641 cut-off events. [2023-01-28 09:05:15,952 INFO L131 PetriNetUnfolder]: For 1896930/1896930 co-relation queries the response was YES. [2023-01-28 09:05:19,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750455 conditions, 106641 events. 62594/106641 cut-off events. For 1896930/1896930 co-relation queries the response was YES. Maximal size of possible extension queue 5635. Compared 1058101 event pairs, 5673 based on Foata normal form. 22/93785 useless extension candidates. Maximal degree in co-relation 749780. Up to 23981 conditions per place. [2023-01-28 09:05:20,295 INFO L137 encePairwiseOnDemand]: 756/771 looper letters, 4126 selfloop transitions, 3078 changer transitions 130/7334 dead transitions. [2023-01-28 09:05:20,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 7334 transitions, 107827 flow [2023-01-28 09:05:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-01-28 09:05:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2023-01-28 09:05:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 27246 transitions. [2023-01-28 09:05:20,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29696236471242193 [2023-01-28 09:05:20,315 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 27246 transitions. [2023-01-28 09:05:20,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 27246 transitions. [2023-01-28 09:05:20,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:05:20,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 27246 transitions. [2023-01-28 09:05:20,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 228.9579831932773) internal successors, (27246), 119 states have internal predecessors, (27246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:05:20,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:05:20,394 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:05:20,395 INFO L175 Difference]: Start difference. First operand has 472 places, 2136 transitions, 28870 flow. Second operand 119 states and 27246 transitions. [2023-01-28 09:05:20,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 7334 transitions, 107827 flow [2023-01-28 09:06:27,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 7334 transitions, 107182 flow, removed 199 selfloop flow, removed 6 redundant places. [2023-01-28 09:06:27,823 INFO L231 Difference]: Finished difference. Result has 642 places, 4623 transitions, 73509 flow [2023-01-28 09:06:27,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=28625, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=73509, PETRI_PLACES=642, PETRI_TRANSITIONS=4623} [2023-01-28 09:06:27,825 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 612 predicate places. [2023-01-28 09:06:27,825 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4623 transitions, 73509 flow [2023-01-28 09:06:27,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:06:27,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:06:27,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:06:27,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 09:06:28,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 09:06:28,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:06:28,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:06:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -770250497, now seen corresponding path program 8 times [2023-01-28 09:06:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:06:28,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176483780] [2023-01-28 09:06:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:06:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:06:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:06:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:06:29,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:06:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176483780] [2023-01-28 09:06:29,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176483780] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:06:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314682002] [2023-01-28 09:06:29,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:06:29,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:06:29,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:06:29,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:06:29,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 09:06:29,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:06:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:06:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 09:06:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:06:29,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 127 [2023-01-28 09:06:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:06:30,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:06:31,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:06:31,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 108 [2023-01-28 09:06:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 09:06:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314682002] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:06:31,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:06:31,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 33 [2023-01-28 09:06:31,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406500958] [2023-01-28 09:06:31,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:06:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 09:06:31,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:06:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 09:06:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 09:06:31,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 771 [2023-01-28 09:06:31,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 4623 transitions, 73509 flow. Second operand has 34 states, 34 states have (on average 228.02941176470588) internal successors, (7753), 34 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:06:31,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:06:31,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 771 [2023-01-28 09:06:31,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:08:15,814 INFO L130 PetriNetUnfolder]: 75073/128847 cut-off events. [2023-01-28 09:08:15,815 INFO L131 PetriNetUnfolder]: For 3085068/3085068 co-relation queries the response was YES. [2023-01-28 09:08:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050012 conditions, 128847 events. 75073/128847 cut-off events. For 3085068/3085068 co-relation queries the response was YES. Maximal size of possible extension queue 6847. Compared 1313627 event pairs, 13614 based on Foata normal form. 12/116019 useless extension candidates. Maximal degree in co-relation 1049762. Up to 53866 conditions per place. [2023-01-28 09:08:23,713 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 4217 selfloop transitions, 2004 changer transitions 21/6242 dead transitions. [2023-01-28 09:08:23,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 6242 transitions, 117777 flow [2023-01-28 09:08:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:08:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:08:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5408 transitions. [2023-01-28 09:08:23,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30496813849884397 [2023-01-28 09:08:23,717 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5408 transitions. [2023-01-28 09:08:23,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5408 transitions. [2023-01-28 09:08:23,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:08:23,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5408 transitions. [2023-01-28 09:08:23,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 235.1304347826087) internal successors, (5408), 23 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:08:23,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 771.0) internal successors, (18504), 24 states have internal predecessors, (18504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:08:23,728 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 771.0) internal successors, (18504), 24 states have internal predecessors, (18504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:08:23,728 INFO L175 Difference]: Start difference. First operand has 642 places, 4623 transitions, 73509 flow. Second operand 23 states and 5408 transitions. [2023-01-28 09:08:23,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 6242 transitions, 117777 flow Received shutdown request... [2023-01-28 09:14:43,635 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:14:43,635 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:14:43,660 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 09:14:43,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 09:14:43,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:14:43,861 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 09:14:43,862 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 09:14:43,862 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 09:14:43,862 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 09:14:43,862 INFO L445 BasicCegarLoop]: Path program histogram: [8, 2, 1, 1] [2023-01-28 09:14:43,864 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 09:14:43,864 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 09:14:43,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 09:14:43 BasicIcfg [2023-01-28 09:14:43,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 09:14:43,866 INFO L158 Benchmark]: Toolchain (without parser) took 818106.93ms. Allocated memory was 547.4MB in the beginning and 13.6GB in the end (delta: 13.0GB). Free memory was 509.5MB in the beginning and 8.1GB in the end (delta: -7.5GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. [2023-01-28 09:14:43,866 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 321.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:14:43,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.60ms. Allocated memory is still 547.4MB. Free memory was 509.0MB in the beginning and 496.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 09:14:43,867 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.03ms. Allocated memory is still 547.4MB. Free memory was 496.1MB in the beginning and 493.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:14:43,867 INFO L158 Benchmark]: Boogie Preprocessor took 46.31ms. Allocated memory is still 547.4MB. Free memory was 493.5MB in the beginning and 491.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:14:43,867 INFO L158 Benchmark]: RCFGBuilder took 548.83ms. Allocated memory is still 547.4MB. Free memory was 491.4MB in the beginning and 465.8MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 09:14:43,867 INFO L158 Benchmark]: TraceAbstraction took 817196.82ms. Allocated memory was 547.4MB in the beginning and 13.6GB in the end (delta: 13.0GB). Free memory was 465.2MB in the beginning and 8.1GB in the end (delta: -7.6GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. [2023-01-28 09:14:43,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 321.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 259.60ms. Allocated memory is still 547.4MB. Free memory was 509.0MB in the beginning and 496.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.03ms. Allocated memory is still 547.4MB. Free memory was 496.1MB in the beginning and 493.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.31ms. Allocated memory is still 547.4MB. Free memory was 493.5MB in the beginning and 491.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 548.83ms. Allocated memory is still 547.4MB. Free memory was 491.4MB in the beginning and 465.8MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 817196.82ms. Allocated memory was 547.4MB in the beginning and 13.6GB in the end (delta: 13.0GB). Free memory was 465.2MB in the beginning and 8.1GB in the end (delta: -7.6GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.6s, 331 PlacesBefore, 30 PlacesAfterwards, 347 TransitionsBefore, 24 TransitionsAfterwards, 28350 CoEnabledTransitionPairs, 8 FixpointIterations, 124 TrivialSequentialCompositions, 178 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 73 ConcurrentYvCompositions, 22 ChoiceCompositions, 411 TotalNumberOfCompositions, 26332 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 25648, independent: 25626, independent conditional: 0, independent unconditional: 25626, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 17150, independent: 17137, independent conditional: 0, independent unconditional: 17137, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 25648, independent: 8489, independent conditional: 0, independent unconditional: 8489, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 17150, unknown conditional: 0, unknown unconditional: 17150] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 134]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 135]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 509 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 817.0s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 783.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5160 SdHoareTripleChecker+Valid, 11.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5160 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 10.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20218 IncrementalHoareTripleChecker+Invalid, 20681 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 0 mSDtfsCounter, 20218 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1077 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19299 ImplicationChecksByTransitivity, 51.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73509occurred in iteration=11, InterpolantAutomatonStates: 460, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 513 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 706 ConstructedInterpolants, 4 QuantifiedInterpolants, 11749 SizeOfPredicates, 386 NumberOfNonLiveVariables, 2421 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 139/220 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown