/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 20:54:13,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 20:54:13,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 20:54:13,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 20:54:13,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 20:54:13,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 20:54:13,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 20:54:13,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 20:54:13,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 20:54:13,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 20:54:13,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 20:54:13,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 20:54:13,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 20:54:13,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 20:54:13,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 20:54:13,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 20:54:13,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 20:54:13,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 20:54:13,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 20:54:13,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 20:54:13,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 20:54:13,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 20:54:13,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 20:54:13,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 20:54:13,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 20:54:13,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 20:54:13,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 20:54:13,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 20:54:13,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 20:54:13,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 20:54:13,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 20:54:13,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 20:54:13,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 20:54:13,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 20:54:13,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 20:54:13,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 20:54:13,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 20:54:13,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 20:54:13,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 20:54:13,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 20:54:13,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 20:54:13,249 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 [2023-01-27 20:54:13,274 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 20:54:13,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 20:54:13,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 20:54:13,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 20:54:13,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 20:54:13,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 20:54:13,276 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 20:54:13,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 20:54:13,277 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 20:54:13,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 20:54:13,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 20:54:13,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 20:54:13,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:54:13,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 20:54:13,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 20:54:13,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 20:54:13,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 20:54:13,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 20:54:13,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 20:54:13,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 20:54:13,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 20:54:13,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 20:54:13,487 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 20:54:13,487 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 20:54:13,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-01-27 20:54:14,538 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 20:54:14,712 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 20:54:14,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-01-27 20:54:14,717 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e060296e/6cc04e3450ae43c4a30bbed3f3c924ce/FLAG06385313b [2023-01-27 20:54:14,728 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e060296e/6cc04e3450ae43c4a30bbed3f3c924ce [2023-01-27 20:54:14,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 20:54:14,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 20:54:14,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 20:54:14,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 20:54:14,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 20:54:14,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c48752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14, skipping insertion in model container [2023-01-27 20:54:14,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 20:54:14,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 20:54:14,908 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/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-01-27 20:54:14,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:54:14,917 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 20:54:14,931 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/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-01-27 20:54:14,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:54:14,937 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 20:54:14,937 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 20:54:14,942 INFO L208 MainTranslator]: Completed translation [2023-01-27 20:54:14,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14 WrapperNode [2023-01-27 20:54:14,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 20:54:14,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 20:54:14,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 20:54:14,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 20:54:14,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,966 INFO L138 Inliner]: procedures = 20, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2023-01-27 20:54:14,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 20:54:14,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 20:54:14,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 20:54:14,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 20:54:14,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 20:54:14,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 20:54:14,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 20:54:14,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 20:54:14,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (1/1) ... [2023-01-27 20:54:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:54:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:54:15,011 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) [2023-01-27 20:54:15,013 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 [2023-01-27 20:54:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 20:54:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 20:54:15,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 20:54:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 20:54:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 20:54:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 20:54:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 20:54:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 20:54:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 20:54:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 20:54:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 20:54:15,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 20:54:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 20:54:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 20:54:15,048 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 20:54:15,153 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 20:54:15,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 20:54:15,393 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 20:54:15,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 20:54:15,425 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 20:54:15,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:54:15 BoogieIcfgContainer [2023-01-27 20:54:15,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 20:54:15,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 20:54:15,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 20:54:15,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 20:54:15,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 08:54:14" (1/3) ... [2023-01-27 20:54:15,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de81b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:54:15, skipping insertion in model container [2023-01-27 20:54:15,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:54:14" (2/3) ... [2023-01-27 20:54:15,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de81b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:54:15, skipping insertion in model container [2023-01-27 20:54:15,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:54:15" (3/3) ... [2023-01-27 20:54:15,433 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2-unrolled.wvr.c [2023-01-27 20:54:15,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 20:54:15,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 20:54:15,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 20:54:15,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 20:54:15,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-01-27 20:54:15,583 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2023-01-27 20:54:15,583 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:54:15,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-01-27 20:54:15,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-01-27 20:54:15,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-01-27 20:54:15,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 20:54:15,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-01-27 20:54:15,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-01-27 20:54:15,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-01-27 20:54:15,629 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-27 20:54:15,629 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:54:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-01-27 20:54:15,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-01-27 20:54:17,590 INFO L134 LiptonReduction]: Checked pairs total: 869 [2023-01-27 20:54:17,590 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-01-27 20:54:17,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 20:54:17,607 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;@62f87367, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 20:54:17,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 20:54:17,612 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 20:54:17,612 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:54:17,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:17,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:17,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:17,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1786021943, now seen corresponding path program 1 times [2023-01-27 20:54:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:17,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343443610] [2023-01-27 20:54:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:17,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:18,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343443610] [2023-01-27 20:54:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343443610] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:54:18,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:54:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 20:54:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159326114] [2023-01-27 20:54:18,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:54:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:54:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:54:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:54:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-01-27 20:54:18,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:18,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-01-27 20:54:18,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:18,200 INFO L130 PetriNetUnfolder]: 60/110 cut-off events. [2023-01-27 20:54:18,201 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-01-27 20:54:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 110 events. 60/110 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 292 event pairs, 9 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 180. Up to 84 conditions per place. [2023-01-27 20:54:18,203 INFO L137 encePairwiseOnDemand]: 171/175 looper letters, 21 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-01-27 20:54:18,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-01-27 20:54:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 20:54:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 20:54:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-01-27 20:54:18,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038095238095238 [2023-01-27 20:54:18,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-01-27 20:54:18,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-01-27 20:54:18,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:18,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-01-27 20:54:18,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,225 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 212 transitions. [2023-01-27 20:54:18,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-01-27 20:54:18,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:54:18,228 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-01-27 20:54:18,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-27 20:54:18,232 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-27 20:54:18,232 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-01-27 20:54:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:18,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:18,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 20:54:18,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:18,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1638161831, now seen corresponding path program 1 times [2023-01-27 20:54:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:18,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014323802] [2023-01-27 20:54:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:54:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014323802] [2023-01-27 20:54:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014323802] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:54:18,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:54:18,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 20:54:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144599142] [2023-01-27 20:54:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:54:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:54:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:54:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:54:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-01-27 20:54:18,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:18,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-01-27 20:54:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:18,487 INFO L130 PetriNetUnfolder]: 84/153 cut-off events. [2023-01-27 20:54:18,487 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-01-27 20:54:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 153 events. 84/153 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 447 event pairs, 27 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 82. Up to 84 conditions per place. [2023-01-27 20:54:18,489 INFO L137 encePairwiseOnDemand]: 170/175 looper letters, 19 selfloop transitions, 7 changer transitions 7/33 dead transitions. [2023-01-27 20:54:18,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 33 transitions, 161 flow [2023-01-27 20:54:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:54:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:54:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2023-01-27 20:54:18,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2023-01-27 20:54:18,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2023-01-27 20:54:18,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2023-01-27 20:54:18,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:18,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2023-01-27 20:54:18,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,496 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,496 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 4 states and 344 transitions. [2023-01-27 20:54:18,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 33 transitions, 161 flow [2023-01-27 20:54:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 20:54:18,497 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 96 flow [2023-01-27 20:54:18,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-01-27 20:54:18,498 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-27 20:54:18,498 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 96 flow [2023-01-27 20:54:18,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:18,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 20:54:18,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:18,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -237269058, now seen corresponding path program 1 times [2023-01-27 20:54:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645062385] [2023-01-27 20:54:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645062385] [2023-01-27 20:54:18,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645062385] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:54:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:54:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:54:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446814215] [2023-01-27 20:54:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:54:18,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:54:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:54:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:54:18,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 175 [2023-01-27 20:54:18,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:18,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 175 [2023-01-27 20:54:18,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:18,693 INFO L130 PetriNetUnfolder]: 104/191 cut-off events. [2023-01-27 20:54:18,693 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-01-27 20:54:18,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 191 events. 104/191 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 9 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 287. Up to 66 conditions per place. [2023-01-27 20:54:18,695 INFO L137 encePairwiseOnDemand]: 168/175 looper letters, 32 selfloop transitions, 9 changer transitions 10/51 dead transitions. [2023-01-27 20:54:18,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 51 transitions, 306 flow [2023-01-27 20:54:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:54:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:54:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2023-01-27 20:54:18,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41942857142857143 [2023-01-27 20:54:18,697 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2023-01-27 20:54:18,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2023-01-27 20:54:18,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:18,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2023-01-27 20:54:18,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,701 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,701 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 96 flow. Second operand 5 states and 367 transitions. [2023-01-27 20:54:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 51 transitions, 306 flow [2023-01-27 20:54:18,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 51 transitions, 302 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-27 20:54:18,703 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 168 flow [2023-01-27 20:54:18,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-01-27 20:54:18,704 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-01-27 20:54:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 168 flow [2023-01-27 20:54:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:18,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 20:54:18,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:18,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 599928642, now seen corresponding path program 2 times [2023-01-27 20:54:18,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:18,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596859869] [2023-01-27 20:54:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:18,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:18,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:18,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596859869] [2023-01-27 20:54:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596859869] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:54:18,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:54:18,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:54:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293399163] [2023-01-27 20:54:18,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:54:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:54:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:54:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:54:18,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 175 [2023-01-27 20:54:18,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:18,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 175 [2023-01-27 20:54:18,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:18,882 INFO L130 PetriNetUnfolder]: 91/169 cut-off events. [2023-01-27 20:54:18,882 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2023-01-27 20:54:18,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 169 events. 91/169 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 505 event pairs, 11 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 237. Up to 84 conditions per place. [2023-01-27 20:54:18,884 INFO L137 encePairwiseOnDemand]: 170/175 looper letters, 26 selfloop transitions, 11 changer transitions 1/38 dead transitions. [2023-01-27 20:54:18,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 286 flow [2023-01-27 20:54:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:54:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:54:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-01-27 20:54:18,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842857142857143 [2023-01-27 20:54:18,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-01-27 20:54:18,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-01-27 20:54:18,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:18,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-01-27 20:54:18,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,892 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 168 flow. Second operand 4 states and 269 transitions. [2023-01-27 20:54:18,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 286 flow [2023-01-27 20:54:18,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 280 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 20:54:18,898 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 216 flow [2023-01-27 20:54:18,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-01-27 20:54:18,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-01-27 20:54:18,899 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 216 flow [2023-01-27 20:54:18,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:18,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:18,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 20:54:18,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:18,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash -227819690, now seen corresponding path program 1 times [2023-01-27 20:54:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229219976] [2023-01-27 20:54:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:54:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229219976] [2023-01-27 20:54:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229219976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:54:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519932963] [2023-01-27 20:54:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:19,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:54:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:54:19,140 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) [2023-01-27 20:54:19,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 20:54:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 20:54:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:54:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:54:19,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:54:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:54:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519932963] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:54:19,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:54:19,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-01-27 20:54:19,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309477269] [2023-01-27 20:54:19,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:54:19,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:54:19,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:54:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:54:19,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-01-27 20:54:19,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:19,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:19,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-01-27 20:54:19,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:19,506 INFO L130 PetriNetUnfolder]: 123/226 cut-off events. [2023-01-27 20:54:19,507 INFO L131 PetriNetUnfolder]: For 724/724 co-relation queries the response was YES. [2023-01-27 20:54:19,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 226 events. 123/226 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 740 event pairs, 16 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 315. Up to 84 conditions per place. [2023-01-27 20:54:19,509 INFO L137 encePairwiseOnDemand]: 169/175 looper letters, 26 selfloop transitions, 17 changer transitions 12/55 dead transitions. [2023-01-27 20:54:19,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 470 flow [2023-01-27 20:54:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:54:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:54:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-01-27 20:54:19,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2023-01-27 20:54:19,511 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-01-27 20:54:19,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-01-27 20:54:19,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:19,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-01-27 20:54:19,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:19,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:19,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:19,515 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 216 flow. Second operand 6 states and 413 transitions. [2023-01-27 20:54:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 470 flow [2023-01-27 20:54:19,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 20:54:19,519 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 327 flow [2023-01-27 20:54:19,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-01-27 20:54:19,519 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-27 20:54:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 327 flow [2023-01-27 20:54:19,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:19,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:19,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:19,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 20:54:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:54:19,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:19,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash -66515524, now seen corresponding path program 2 times [2023-01-27 20:54:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:19,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834246668] [2023-01-27 20:54:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:19,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:54:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:20,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834246668] [2023-01-27 20:54:20,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834246668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:54:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108400131] [2023-01-27 20:54:20,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:54:20,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:54:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:54:20,005 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) [2023-01-27 20:54:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 20:54:20,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:54:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:54:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 20:54:20,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:54:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:54:20,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:54:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108400131] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:54:20,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:54:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-01-27 20:54:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697280239] [2023-01-27 20:54:20,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:54:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:54:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:54:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:54:20,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-01-27 20:54:20,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:20,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-01-27 20:54:20,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:20,250 INFO L130 PetriNetUnfolder]: 140/260 cut-off events. [2023-01-27 20:54:20,251 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-01-27 20:54:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 260 events. 140/260 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 901 event pairs, 32 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 769. Up to 179 conditions per place. [2023-01-27 20:54:20,253 INFO L137 encePairwiseOnDemand]: 169/175 looper letters, 37 selfloop transitions, 17 changer transitions 3/57 dead transitions. [2023-01-27 20:54:20,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 584 flow [2023-01-27 20:54:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:54:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:54:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-01-27 20:54:20,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342857142857143 [2023-01-27 20:54:20,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-01-27 20:54:20,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-01-27 20:54:20,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-01-27 20:54:20,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,263 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,264 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 327 flow. Second operand 5 states and 423 transitions. [2023-01-27 20:54:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 584 flow [2023-01-27 20:54:20,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 534 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-27 20:54:20,269 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 465 flow [2023-01-27 20:54:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-01-27 20:54:20,271 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-01-27 20:54:20,271 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 465 flow [2023-01-27 20:54:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:54:20,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:54:20,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 20:54:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 20:54:20,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:54:20,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:54:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1627690428, now seen corresponding path program 3 times [2023-01-27 20:54:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:54:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550854920] [2023-01-27 20:54:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:54:20,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:54:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:54:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:20,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:54:20,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550854920] [2023-01-27 20:54:20,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550854920] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:54:20,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38898000] [2023-01-27 20:54:20,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:54:20,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:54:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:54:20,621 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) [2023-01-27 20:54:20,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 20:54:20,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:54:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:54:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 20:54:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:54:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:54:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:54:20,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38898000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:54:20,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:54:20,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-01-27 20:54:20,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147739610] [2023-01-27 20:54:20,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:54:20,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:54:20,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:54:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:54:20,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 20:54:20,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-01-27 20:54:20,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:54:20,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-01-27 20:54:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:54:20,880 INFO L130 PetriNetUnfolder]: 140/259 cut-off events. [2023-01-27 20:54:20,881 INFO L131 PetriNetUnfolder]: For 1091/1091 co-relation queries the response was YES. [2023-01-27 20:54:20,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 259 events. 140/259 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 911 event pairs, 38 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 955. Up to 137 conditions per place. [2023-01-27 20:54:20,883 INFO L137 encePairwiseOnDemand]: 169/175 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-01-27 20:54:20,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 642 flow [2023-01-27 20:54:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:54:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:54:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2023-01-27 20:54:20,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723809523809524 [2023-01-27 20:54:20,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2023-01-27 20:54:20,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2023-01-27 20:54:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:54:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2023-01-27 20:54:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,888 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 465 flow. Second operand 6 states and 496 transitions. [2023-01-27 20:54:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 642 flow [2023-01-27 20:54:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 626 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-27 20:54:20,893 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-01-27 20:54:20,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-01-27 20:54:20,895 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-01-27 20:54:20,895 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-01-27 20:54:20,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:54:20,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 20:54:20,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 20:54:20,898 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 20:54:20,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 20:54:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:54:21,108 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2023-01-27 20:54:21,110 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 20:54:21,110 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 20:54:21,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 08:54:21 BasicIcfg [2023-01-27 20:54:21,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 20:54:21,114 INFO L158 Benchmark]: Toolchain (without parser) took 6382.56ms. Allocated memory is still 488.6MB. Free memory was 440.6MB in the beginning and 317.2MB in the end (delta: 123.4MB). Peak memory consumption was 125.2MB. Max. memory is 16.0GB. [2023-01-27 20:54:21,114 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 303.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 20:54:21,114 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.58ms. Allocated memory is still 488.6MB. Free memory was 440.2MB in the beginning and 429.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 20:54:21,114 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.37ms. Allocated memory is still 488.6MB. Free memory was 429.4MB in the beginning and 428.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 20:54:21,115 INFO L158 Benchmark]: Boogie Preprocessor took 17.31ms. Allocated memory is still 488.6MB. Free memory was 428.0MB in the beginning and 426.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 20:54:21,115 INFO L158 Benchmark]: RCFGBuilder took 441.90ms. Allocated memory is still 488.6MB. Free memory was 426.7MB in the beginning and 412.2MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 20:54:21,115 INFO L158 Benchmark]: TraceAbstraction took 5685.30ms. Allocated memory is still 488.6MB. Free memory was 411.6MB in the beginning and 317.2MB in the end (delta: 94.4MB). Peak memory consumption was 95.8MB. Max. memory is 16.0GB. [2023-01-27 20:54:21,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 303.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 210.58ms. Allocated memory is still 488.6MB. Free memory was 440.2MB in the beginning and 429.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.37ms. Allocated memory is still 488.6MB. Free memory was 429.4MB in the beginning and 428.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.31ms. Allocated memory is still 488.6MB. Free memory was 428.0MB in the beginning and 426.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 441.90ms. Allocated memory is still 488.6MB. Free memory was 426.7MB in the beginning and 412.2MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5685.30ms. Allocated memory is still 488.6MB. Free memory was 411.6MB in the beginning and 317.2MB in the end (delta: 94.4MB). Peak memory consumption was 95.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 86 PlacesBefore, 20 PlacesAfterwards, 85 TransitionsBefore, 15 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 80 TotalNumberOfCompositions, 869 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 745, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 401, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 745, independent: 327, independent conditional: 0, independent unconditional: 327, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 401, unknown conditional: 0, unknown unconditional: 401] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 87]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 116 locations, 3 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: 5.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 493 IncrementalHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 493 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=465occurred in iteration=6, InterpolantAutomatonStates: 33, 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 1723 SizeOfPredicates, 12 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 9/19 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 20:54:21,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...