./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:57:58,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:57:58,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:57:58,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:57:58,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:57:58,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:57:58,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:57:58,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:57:58,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:57:59,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:57:59,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:57:59,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:57:59,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:57:59,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:57:59,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:57:59,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:57:59,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:57:59,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:57:59,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:57:59,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:57:59,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:57:59,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:57:59,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:57:59,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:57:59,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:57:59,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:57:59,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:57:59,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:57:59,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:57:59,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:57:59,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:57:59,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:57:59,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:57:59,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:57:59,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:57:59,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:57:59,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:57:59,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:57:59,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:57:59,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:57:59,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:57:59,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:57:59,083 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:57:59,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:57:59,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:57:59,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:57:59,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:57:59,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:57:59,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:57:59,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:57:59,086 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:57:59,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:57:59,087 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:57:59,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:57:59,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:57:59,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:57:59,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:57:59,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:57:59,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:57:59,089 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:57:59,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:57:59,089 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:57:59,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:57:59,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:57:59,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:57:59,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:57:59,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:57:59,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:57:59,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:57:59,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:57:59,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:57:59,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:57:59,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:57:59,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:57:59,092 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:57:59,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:57:59,092 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:57:59,092 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:57:59,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:57:59,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:57:59,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:57:59,402 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:57:59,403 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:57:59,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2023-09-01 09:58:00,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:58:00,707 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:58:00,708 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2023-09-01 09:58:00,719 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d8fd166/6b16b9261db14b279b8352d629dfcc08/FLAG3b22d28ab [2023-09-01 09:58:00,734 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d8fd166/6b16b9261db14b279b8352d629dfcc08 [2023-09-01 09:58:00,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:58:00,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:58:00,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:58:00,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:58:00,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:58:00,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:58:00" (1/1) ... [2023-09-01 09:58:00,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e102c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:00, skipping insertion in model container [2023-09-01 09:58:00,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:58:00" (1/1) ... [2023-09-01 09:58:00,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:58:00,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:58:00,969 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] [2023-09-01 09:58:01,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:58:01,157 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:58:01,171 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i[945,958] [2023-09-01 09:58:01,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:58:01,226 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:58:01,227 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:58:01,240 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:58:01,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01 WrapperNode [2023-09-01 09:58:01,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:58:01,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:58:01,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:58:01,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:58:01,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,297 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-09-01 09:58:01,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:58:01,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:58:01,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:58:01,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:58:01,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:58:01,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:58:01,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:58:01,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:58:01,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (1/1) ... [2023-09-01 09:58:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:58:01,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:58:01,381 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) [2023-09-01 09:58:01,402 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 [2023-09-01 09:58:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-09-01 09:58:01,418 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-09-01 09:58:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-09-01 09:58:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-09-01 09:58:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-09-01 09:58:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-09-01 09:58:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:58:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 09:58:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:58:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:58:01,420 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:58:01,605 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:58:01,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:58:01,741 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:58:01,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:58:01,750 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 09:58:01,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:01 BoogieIcfgContainer [2023-09-01 09:58:01,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:58:01,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:58:01,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:58:01,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:58:01,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:58:00" (1/3) ... [2023-09-01 09:58:01,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:58:01, skipping insertion in model container [2023-09-01 09:58:01,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:01" (2/3) ... [2023-09-01 09:58:01,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:58:01, skipping insertion in model container [2023-09-01 09:58:01,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:01" (3/3) ... [2023-09-01 09:58:01,760 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2023-09-01 09:58:01,767 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:58:01,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:58:01,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:58:01,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:58:01,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:58:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 85 transitions, 185 flow [2023-09-01 09:58:01,924 INFO L130 PetriNetUnfolder]: 2/82 cut-off events. [2023-09-01 09:58:01,924 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:01,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-09-01 09:58:01,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 85 transitions, 185 flow [2023-09-01 09:58:01,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 149 flow [2023-09-01 09:58:01,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:58:01,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 149 flow [2023-09-01 09:58:01,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 149 flow [2023-09-01 09:58:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 149 flow [2023-09-01 09:58:01,980 INFO L130 PetriNetUnfolder]: 1/70 cut-off events. [2023-09-01 09:58:01,983 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:01,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-09-01 09:58:01,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-09-01 09:58:03,970 INFO L134 LiptonReduction]: Checked pairs total: 2098 [2023-09-01 09:58:03,970 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-09-01 09:58:03,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:58:03,987 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1bb0081b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:58:03,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 09:58:03,993 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-09-01 09:58:03,993 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:03,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:03,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:03,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:03,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1331089238, now seen corresponding path program 1 times [2023-09-01 09:58:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377298307] [2023-09-01 09:58:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:04,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:04,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377298307] [2023-09-01 09:58:04,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377298307] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:04,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:04,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 09:58:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890404682] [2023-09-01 09:58:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:58:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:58:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:58:04,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-09-01 09:58:04,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-09-01 09:58:04,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:04,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-09-01 09:58:04,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:04,814 INFO L130 PetriNetUnfolder]: 424/734 cut-off events. [2023-09-01 09:58:04,814 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:58:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 734 events. 424/734 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3618 event pairs, 160 based on Foata normal form. 43/777 useless extension candidates. Maximal degree in co-relation 1476. Up to 392 conditions per place. [2023-09-01 09:58:04,823 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 21 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2023-09-01 09:58:04,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 122 flow [2023-09-01 09:58:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:58:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:58:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-09-01 09:58:04,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594405594405595 [2023-09-01 09:58:04,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-09-01 09:58:04,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-09-01 09:58:04,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:04,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-09-01 09:58:04,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2023-09-01 09:58:04,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-09-01 09:58:04,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-09-01 09:58:04,854 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 240 transitions. [2023-09-01 09:58:04,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 122 flow [2023-09-01 09:58:04,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:58:04,858 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 86 flow [2023-09-01 09:58:04,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-09-01 09:58:04,863 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-09-01 09:58:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 86 flow [2023-09-01 09:58:04,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-09-01 09:58:04,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:04,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:04,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:58:04,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:04,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1685907047, now seen corresponding path program 1 times [2023-09-01 09:58:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:04,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682726819] [2023-09-01 09:58:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:05,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682726819] [2023-09-01 09:58:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682726819] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:05,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:05,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:05,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569727332] [2023-09-01 09:58:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:05,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:05,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-09-01 09:58:05,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2023-09-01 09:58:05,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:05,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-09-01 09:58:05,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:05,227 INFO L130 PetriNetUnfolder]: 349/606 cut-off events. [2023-09-01 09:58:05,227 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-09-01 09:58:05,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 606 events. 349/606 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2869 event pairs, 114 based on Foata normal form. 18/620 useless extension candidates. Maximal degree in co-relation 1616. Up to 209 conditions per place. [2023-09-01 09:58:05,230 INFO L137 encePairwiseOnDemand]: 137/143 looper letters, 32 selfloop transitions, 6 changer transitions 2/41 dead transitions. [2023-09-01 09:58:05,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 228 flow [2023-09-01 09:58:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2023-09-01 09:58:05,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2023-09-01 09:58:05,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2023-09-01 09:58:05,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2023-09-01 09:58:05,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:05,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2023-09-01 09:58:05,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2023-09-01 09:58:05,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:05,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:05,241 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 86 flow. Second operand 4 states and 316 transitions. [2023-09-01 09:58:05,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 228 flow [2023-09-01 09:58:05,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:58:05,247 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 118 flow [2023-09-01 09:58:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-09-01 09:58:05,248 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 09:58:05,248 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 118 flow [2023-09-01 09:58:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2023-09-01 09:58:05,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:05,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:05,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:58:05,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:05,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1271782783, now seen corresponding path program 1 times [2023-09-01 09:58:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811859708] [2023-09-01 09:58:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:05,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811859708] [2023-09-01 09:58:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811859708] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:05,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404924688] [2023-09-01 09:58:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:05,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-09-01 09:58:05,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2023-09-01 09:58:05,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:05,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-09-01 09:58:05,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:05,525 INFO L130 PetriNetUnfolder]: 341/594 cut-off events. [2023-09-01 09:58:05,525 INFO L131 PetriNetUnfolder]: For 499/499 co-relation queries the response was YES. [2023-09-01 09:58:05,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 594 events. 341/594 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2722 event pairs, 85 based on Foata normal form. 4/596 useless extension candidates. Maximal degree in co-relation 1716. Up to 219 conditions per place. [2023-09-01 09:58:05,528 INFO L137 encePairwiseOnDemand]: 136/143 looper letters, 27 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-09-01 09:58:05,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 244 flow [2023-09-01 09:58:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-09-01 09:58:05,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437062937062938 [2023-09-01 09:58:05,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-09-01 09:58:05,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-09-01 09:58:05,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:05,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-09-01 09:58:05,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2023-09-01 09:58:05,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:05,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:05,534 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 118 flow. Second operand 4 states and 311 transitions. [2023-09-01 09:58:05,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 244 flow [2023-09-01 09:58:05,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:58:05,537 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 180 flow [2023-09-01 09:58:05,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-09-01 09:58:05,538 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-09-01 09:58:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 180 flow [2023-09-01 09:58:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2023-09-01 09:58:05,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:58:05,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:05,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1652113145, now seen corresponding path program 1 times [2023-09-01 09:58:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831877368] [2023-09-01 09:58:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:05,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:05,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831877368] [2023-09-01 09:58:05,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831877368] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:05,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:05,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093687797] [2023-09-01 09:58:05,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:05,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:05,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 143 [2023-09-01 09:58:05,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:58:05,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:05,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 143 [2023-09-01 09:58:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:05,811 INFO L130 PetriNetUnfolder]: 487/794 cut-off events. [2023-09-01 09:58:05,811 INFO L131 PetriNetUnfolder]: For 1437/1437 co-relation queries the response was YES. [2023-09-01 09:58:05,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 794 events. 487/794 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3336 event pairs, 86 based on Foata normal form. 8/802 useless extension candidates. Maximal degree in co-relation 2650. Up to 296 conditions per place. [2023-09-01 09:58:05,816 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 38 selfloop transitions, 14 changer transitions 14/66 dead transitions. [2023-09-01 09:58:05,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 543 flow [2023-09-01 09:58:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:58:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:58:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 389 transitions. [2023-09-01 09:58:05,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544055944055944 [2023-09-01 09:58:05,818 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 389 transitions. [2023-09-01 09:58:05,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 389 transitions. [2023-09-01 09:58:05,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:05,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 389 transitions. [2023-09-01 09:58:05,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 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) [2023-09-01 09:58:05,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:05,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:05,822 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 180 flow. Second operand 5 states and 389 transitions. [2023-09-01 09:58:05,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 543 flow [2023-09-01 09:58:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 536 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:58:05,827 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 308 flow [2023-09-01 09:58:05,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-09-01 09:58:05,828 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 09:58:05,828 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 308 flow [2023-09-01 09:58:05,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:58:05,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:05,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:58:05,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:05,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash 324099592, now seen corresponding path program 1 times [2023-09-01 09:58:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656172567] [2023-09-01 09:58:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:05,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656172567] [2023-09-01 09:58:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656172567] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:05,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:05,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258163663] [2023-09-01 09:58:05,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:05,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:58:05,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:58:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:58:05,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 143 [2023-09-01 09:58:05,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:58:05,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:05,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 143 [2023-09-01 09:58:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:06,096 INFO L130 PetriNetUnfolder]: 396/693 cut-off events. [2023-09-01 09:58:06,097 INFO L131 PetriNetUnfolder]: For 2143/2143 co-relation queries the response was YES. [2023-09-01 09:58:06,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 693 events. 396/693 cut-off events. For 2143/2143 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3116 event pairs, 116 based on Foata normal form. 18/711 useless extension candidates. Maximal degree in co-relation 2584. Up to 332 conditions per place. [2023-09-01 09:58:06,100 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 28 selfloop transitions, 6 changer transitions 17/51 dead transitions. [2023-09-01 09:58:06,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 492 flow [2023-09-01 09:58:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:58:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:58:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 376 transitions. [2023-09-01 09:58:06,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258741258741259 [2023-09-01 09:58:06,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 376 transitions. [2023-09-01 09:58:06,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 376 transitions. [2023-09-01 09:58:06,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:06,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 376 transitions. [2023-09-01 09:58:06,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 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) [2023-09-01 09:58:06,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:06,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:06,107 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 308 flow. Second operand 5 states and 376 transitions. [2023-09-01 09:58:06,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 492 flow [2023-09-01 09:58:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:58:06,115 INFO L231 Difference]: Finished difference. Result has 50 places, 24 transitions, 208 flow [2023-09-01 09:58:06,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=50, PETRI_TRANSITIONS=24} [2023-09-01 09:58:06,118 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-09-01 09:58:06,118 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 24 transitions, 208 flow [2023-09-01 09:58:06,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:58:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:06,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:06,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:58:06,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:06,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1438105554, now seen corresponding path program 1 times [2023-09-01 09:58:06,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:06,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174817340] [2023-09-01 09:58:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:06,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174817340] [2023-09-01 09:58:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174817340] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333157146] [2023-09-01 09:58:06,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:06,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:58:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:06,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:58:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:58:06,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-09-01 09:58:06,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 24 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:06,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:06,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-09-01 09:58:06,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:06,301 INFO L130 PetriNetUnfolder]: 96/203 cut-off events. [2023-09-01 09:58:06,301 INFO L131 PetriNetUnfolder]: For 798/813 co-relation queries the response was YES. [2023-09-01 09:58:06,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 203 events. 96/203 cut-off events. For 798/813 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 789 event pairs, 24 based on Foata normal form. 11/206 useless extension candidates. Maximal degree in co-relation 788. Up to 143 conditions per place. [2023-09-01 09:58:06,304 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 25 selfloop transitions, 3 changer transitions 1/35 dead transitions. [2023-09-01 09:58:06,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 338 flow [2023-09-01 09:58:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:58:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:58:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-09-01 09:58:06,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827505827505828 [2023-09-01 09:58:06,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-09-01 09:58:06,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-09-01 09:58:06,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:06,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-09-01 09:58:06,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-09-01 09:58:06,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-09-01 09:58:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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) [2023-09-01 09:58:06,308 INFO L175 Difference]: Start difference. First operand has 50 places, 24 transitions, 208 flow. Second operand 3 states and 250 transitions. [2023-09-01 09:58:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 338 flow [2023-09-01 09:58:06,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 257 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-09-01 09:58:06,312 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 166 flow [2023-09-01 09:58:06,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-09-01 09:58:06,313 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-09-01 09:58:06,313 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 166 flow [2023-09-01 09:58:06,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:06,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:06,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:06,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:58:06,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:06,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1350323362, now seen corresponding path program 1 times [2023-09-01 09:58:06,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:06,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859573443] [2023-09-01 09:58:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:06,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859573443] [2023-09-01 09:58:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859573443] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:06,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:06,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:06,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431312991] [2023-09-01 09:58:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:06,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:06,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-09-01 09:58:06,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-09-01 09:58:06,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:06,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-09-01 09:58:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:06,542 INFO L130 PetriNetUnfolder]: 76/164 cut-off events. [2023-09-01 09:58:06,542 INFO L131 PetriNetUnfolder]: For 314/340 co-relation queries the response was YES. [2023-09-01 09:58:06,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 164 events. 76/164 cut-off events. For 314/340 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 611 event pairs, 13 based on Foata normal form. 20/175 useless extension candidates. Maximal degree in co-relation 625. Up to 66 conditions per place. [2023-09-01 09:58:06,543 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 27 selfloop transitions, 5 changer transitions 3/41 dead transitions. [2023-09-01 09:58:06,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 321 flow [2023-09-01 09:58:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2023-09-01 09:58:06,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-09-01 09:58:06,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 330 transitions. [2023-09-01 09:58:06,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 330 transitions. [2023-09-01 09:58:06,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:06,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 330 transitions. [2023-09-01 09:58:06,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 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) [2023-09-01 09:58:06,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:06,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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) [2023-09-01 09:58:06,548 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 166 flow. Second operand 4 states and 330 transitions. [2023-09-01 09:58:06,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 321 flow [2023-09-01 09:58:06,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 312 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 09:58:06,550 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 175 flow [2023-09-01 09:58:06,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-09-01 09:58:06,551 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 09:58:06,551 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 175 flow [2023-09-01 09:58:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-09-01 09:58:06,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:06,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:58:06,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:06,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1140432208, now seen corresponding path program 1 times [2023-09-01 09:58:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092901962] [2023-09-01 09:58:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092901962] [2023-09-01 09:58:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092901962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:58:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376864169] [2023-09-01 09:58:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:58:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:58:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:58:06,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-09-01 09:58:06,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 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) [2023-09-01 09:58:06,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:06,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-09-01 09:58:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:06,762 INFO L130 PetriNetUnfolder]: 69/147 cut-off events. [2023-09-01 09:58:06,762 INFO L131 PetriNetUnfolder]: For 459/487 co-relation queries the response was YES. [2023-09-01 09:58:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 147 events. 69/147 cut-off events. For 459/487 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 553 event pairs, 12 based on Foata normal form. 12/151 useless extension candidates. Maximal degree in co-relation 591. Up to 65 conditions per place. [2023-09-01 09:58:06,763 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-09-01 09:58:06,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 304 flow [2023-09-01 09:58:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:58:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:58:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 401 transitions. [2023-09-01 09:58:06,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608391608391609 [2023-09-01 09:58:06,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 401 transitions. [2023-09-01 09:58:06,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 401 transitions. [2023-09-01 09:58:06,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:06,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 401 transitions. [2023-09-01 09:58:06,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2023-09-01 09:58:06,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:06,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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) [2023-09-01 09:58:06,768 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 175 flow. Second operand 5 states and 401 transitions. [2023-09-01 09:58:06,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 304 flow [2023-09-01 09:58:06,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 287 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 09:58:06,770 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-09-01 09:58:06,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-09-01 09:58:06,771 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 09:58:06,771 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-09-01 09:58:06,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 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) [2023-09-01 09:58:06,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-09-01 09:58:06,775 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-09-01 09:58:06,775 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-09-01 09:58:06,775 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-09-01 09:58:06,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:58:06,776 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:06,778 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:58:06,778 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:58:06,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:58:06 BasicIcfg [2023-09-01 09:58:06,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:58:06,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:58:06,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:58:06,782 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:58:06,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:01" (3/4) ... [2023-09-01 09:58:06,784 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 09:58:06,789 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-09-01 09:58:06,789 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-09-01 09:58:06,790 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-09-01 09:58:06,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 09:58:06,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 09:58:06,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 09:58:06,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 09:58:06,819 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:58:06,819 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:58:06,820 INFO L158 Benchmark]: Toolchain (without parser) took 6080.90ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 64.9MB in the beginning and 84.2MB in the end (delta: -19.3MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,820 INFO L158 Benchmark]: CDTParser took 0.83ms. Allocated memory is still 69.2MB. Free memory was 47.4MB in the beginning and 47.3MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:58:06,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.72ms. Allocated memory is still 88.1MB. Free memory was 64.7MB in the beginning and 67.0MB in the end (delta: -2.2MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,821 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.77ms. Allocated memory is still 88.1MB. Free memory was 67.0MB in the beginning and 64.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,821 INFO L158 Benchmark]: Boogie Preprocessor took 43.39ms. Allocated memory is still 88.1MB. Free memory was 64.9MB in the beginning and 63.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:58:06,821 INFO L158 Benchmark]: RCFGBuilder took 409.84ms. Allocated memory is still 88.1MB. Free memory was 63.5MB in the beginning and 49.9MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,822 INFO L158 Benchmark]: TraceAbstraction took 5026.99ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 49.2MB in the beginning and 86.4MB in the end (delta: -37.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,822 INFO L158 Benchmark]: Witness Printer took 37.99ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 84.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:58:06,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83ms. Allocated memory is still 69.2MB. Free memory was 47.4MB in the beginning and 47.3MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 499.72ms. Allocated memory is still 88.1MB. Free memory was 64.7MB in the beginning and 67.0MB in the end (delta: -2.2MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.77ms. Allocated memory is still 88.1MB. Free memory was 67.0MB in the beginning and 64.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.39ms. Allocated memory is still 88.1MB. Free memory was 64.9MB in the beginning and 63.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 409.84ms. Allocated memory is still 88.1MB. Free memory was 63.5MB in the beginning and 49.9MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5026.99ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 49.2MB in the beginning and 86.4MB in the end (delta: -37.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Witness Printer took 37.99ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 84.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 79 PlacesBefore, 27 PlacesAfterwards, 70 TransitionsBefore, 18 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 2098 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1327, independent: 1243, independent conditional: 0, independent unconditional: 1243, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 585, independent: 561, independent conditional: 0, independent unconditional: 561, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1327, independent: 682, independent conditional: 0, independent unconditional: 682, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 585, unknown conditional: 0, unknown unconditional: 585] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: 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 7 procedures, 108 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 216 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 80 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 32 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 336 IncrementalHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 48 mSDtfsCounter, 336 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=4, 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, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 399 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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! [2023-09-01 09:58:06,840 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE