./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:59:03,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:59:03,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:59:04,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:59:04,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:59:04,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:59:04,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:59:04,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:59:04,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:59:04,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:59:04,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:59:04,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:59:04,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:59:04,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:59:04,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:59:04,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:59:04,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:59:04,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:59:04,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:59:04,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:59:04,043 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:59:04,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:59:04,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:59:04,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:59:04,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:59:04,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:59:04,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:59:04,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:59:04,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:59:04,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:59:04,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:59:04,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:59:04,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:59:04,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:59:04,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:59:04,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:59:04,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:59:04,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:59:04,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:59:04,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:59:04,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:59:04,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:59:04,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:59:04,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:59:04,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:59:04,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:59:04,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:59:04,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:59:04,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:59:04,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:59:04,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:59:04,093 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:59:04,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:59:04,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:59:04,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:59:04,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:59:04,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:59:04,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:59:04,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:59:04,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:59:04,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:59:04,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:59:04,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:59:04,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:59:04,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:59:04,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:59:04,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:59:04,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:59:04,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:59:04,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:59:04,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:59:04,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:59:04,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:59:04,098 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:59:04,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:59:04,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:59:04,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2022-07-13 21:59:04,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:59:04,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:59:04,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:59:04,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:59:04,355 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:59:04,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2022-07-13 21:59:04,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f0f72b8/6d85b665faa34979ad7b90a66d3356a0/FLAG9ebd6e0a7 [2022-07-13 21:59:04,981 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:59:04,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2022-07-13 21:59:04,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f0f72b8/6d85b665faa34979ad7b90a66d3356a0/FLAG9ebd6e0a7 [2022-07-13 21:59:05,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f0f72b8/6d85b665faa34979ad7b90a66d3356a0 [2022-07-13 21:59:05,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:59:05,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:59:05,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:59:05,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:59:05,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:59:05,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:05,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c92905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05, skipping insertion in model container [2022-07-13 21:59:05,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:05,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:59:05,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:59:05,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2022-07-13 21:59:05,846 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,846 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,847 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,847 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:59:05,877 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:59:05,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2022-07-13 21:59:05,911 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,911 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,911 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,912 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-13 21:59:05,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:59:05,983 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:59:05,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05 WrapperNode [2022-07-13 21:59:05,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:59:05,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:59:05,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:59:05,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:59:05,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,056 INFO L137 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 182 [2022-07-13 21:59:06,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:59:06,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:59:06,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:59:06,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:59:06,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:59:06,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:59:06,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:59:06,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:59:06,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (1/1) ... [2022-07-13 21:59:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:59:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:06,137 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) [2022-07-13 21:59:06,155 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 [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:59:06,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:59:06,173 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:59:06,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:59:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:59:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:59:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:59:06,185 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:59:06,337 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:59:06,339 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:59:06,585 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:59:06,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:59:06,594 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-13 21:59:06,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:59:06 BoogieIcfgContainer [2022-07-13 21:59:06,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:59:06,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:59:06,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:59:06,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:59:06,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:59:05" (1/3) ... [2022-07-13 21:59:06,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064947c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:59:06, skipping insertion in model container [2022-07-13 21:59:06,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:05" (2/3) ... [2022-07-13 21:59:06,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064947c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:59:06, skipping insertion in model container [2022-07-13 21:59:06,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:59:06" (3/3) ... [2022-07-13 21:59:06,603 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2022-07-13 21:59:06,608 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:59:06,616 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:59:06,616 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:59:06,616 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:59:06,688 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:59:06,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 198 transitions, 404 flow [2022-07-13 21:59:06,771 INFO L129 PetriNetUnfolder]: 26/215 cut-off events. [2022-07-13 21:59:06,771 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-13 21:59:06,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 215 events. 26/215 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 520 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2022-07-13 21:59:06,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 198 transitions, 404 flow [2022-07-13 21:59:06,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 391 flow [2022-07-13 21:59:06,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:06,809 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@296d499b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9bb6414 [2022-07-13 21:59:06,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:59:06,826 INFO L129 PetriNetUnfolder]: 7/95 cut-off events. [2022-07-13 21:59:06,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:59:06,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:06,827 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:06,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1142359860, now seen corresponding path program 1 times [2022-07-13 21:59:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:06,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505684324] [2022-07-13 21:59:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:07,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:07,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505684324] [2022-07-13 21:59:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505684324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:07,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:07,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:59:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054008301] [2022-07-13 21:59:07,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:59:07,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:59:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:59:07,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 198 [2022-07-13 21:59:07,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 193 transitions, 391 flow. Second operand has 2 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:07,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:07,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 198 [2022-07-13 21:59:07,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:07,173 INFO L129 PetriNetUnfolder]: 5/189 cut-off events. [2022-07-13 21:59:07,173 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:59:07,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 189 events. 5/189 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 20/198 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2022-07-13 21:59:07,176 INFO L132 encePairwiseOnDemand]: 180/198 looper letters, 1 selfloop transitions, 0 changer transitions 0/174 dead transitions. [2022-07-13 21:59:07,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 174 transitions, 355 flow [2022-07-13 21:59:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:59:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:59:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2022-07-13 21:59:07,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9419191919191919 [2022-07-13 21:59:07,192 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2022-07-13 21:59:07,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2022-07-13 21:59:07,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:07,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2022-07-13 21:59:07,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 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) [2022-07-13 21:59:07,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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) [2022-07-13 21:59:07,207 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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) [2022-07-13 21:59:07,209 INFO L186 Difference]: Start difference. First operand has 173 places, 193 transitions, 391 flow. Second operand 2 states and 373 transitions. [2022-07-13 21:59:07,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 174 transitions, 355 flow [2022-07-13 21:59:07,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 174 transitions, 355 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:07,218 INFO L242 Difference]: Finished difference. Result has 173 places, 174 transitions, 353 flow [2022-07-13 21:59:07,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=353, PETRI_PLACES=173, PETRI_TRANSITIONS=174} [2022-07-13 21:59:07,224 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 0 predicate places. [2022-07-13 21:59:07,225 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 174 transitions, 353 flow [2022-07-13 21:59:07,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:07,225 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:07,226 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:07,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:59:07,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2139432213, now seen corresponding path program 1 times [2022-07-13 21:59:07,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:07,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410691781] [2022-07-13 21:59:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:07,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:07,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410691781] [2022-07-13 21:59:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410691781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:07,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:07,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:07,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019910049] [2022-07-13 21:59:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:07,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:07,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 198 [2022-07-13 21:59:07,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 174 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2022-07-13 21:59:07,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:07,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 198 [2022-07-13 21:59:07,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:07,418 INFO L129 PetriNetUnfolder]: 6/239 cut-off events. [2022-07-13 21:59:07,418 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:59:07,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 239 events. 6/239 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 581 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 260. Up to 12 conditions per place. [2022-07-13 21:59:07,422 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 16 selfloop transitions, 2 changer transitions 0/181 dead transitions. [2022-07-13 21:59:07,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 181 transitions, 403 flow [2022-07-13 21:59:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2022-07-13 21:59:07,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-07-13 21:59:07,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2022-07-13 21:59:07,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2022-07-13 21:59:07,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:07,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2022-07-13 21:59:07,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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) [2022-07-13 21:59:07,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-07-13 21:59:07,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-07-13 21:59:07,436 INFO L186 Difference]: Start difference. First operand has 173 places, 174 transitions, 353 flow. Second operand 3 states and 520 transitions. [2022-07-13 21:59:07,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 181 transitions, 403 flow [2022-07-13 21:59:07,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 181 transitions, 403 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:07,440 INFO L242 Difference]: Finished difference. Result has 176 places, 175 transitions, 365 flow [2022-07-13 21:59:07,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=176, PETRI_TRANSITIONS=175} [2022-07-13 21:59:07,441 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 3 predicate places. [2022-07-13 21:59:07,442 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 175 transitions, 365 flow [2022-07-13 21:59:07,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2022-07-13 21:59:07,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:07,443 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:59:07,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1418231055, now seen corresponding path program 1 times [2022-07-13 21:59:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:07,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166640969] [2022-07-13 21:59:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:07,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:07,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166640969] [2022-07-13 21:59:07,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166640969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:07,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:07,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587261282] [2022-07-13 21:59:07,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:07,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 198 [2022-07-13 21:59:07,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 175 transitions, 365 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-13 21:59:07,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:07,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 198 [2022-07-13 21:59:07,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:07,642 INFO L129 PetriNetUnfolder]: 6/311 cut-off events. [2022-07-13 21:59:07,642 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:59:07,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 311 events. 6/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 583 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 341. Up to 15 conditions per place. [2022-07-13 21:59:07,646 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 10 selfloop transitions, 2 changer transitions 0/179 dead transitions. [2022-07-13 21:59:07,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 179 transitions, 397 flow [2022-07-13 21:59:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2022-07-13 21:59:07,648 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8804713804713805 [2022-07-13 21:59:07,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2022-07-13 21:59:07,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2022-07-13 21:59:07,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:07,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2022-07-13 21:59:07,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2022-07-13 21:59:07,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-07-13 21:59:07,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-07-13 21:59:07,652 INFO L186 Difference]: Start difference. First operand has 176 places, 175 transitions, 365 flow. Second operand 3 states and 523 transitions. [2022-07-13 21:59:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 179 transitions, 397 flow [2022-07-13 21:59:07,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 179 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:07,662 INFO L242 Difference]: Finished difference. Result has 178 places, 176 transitions, 375 flow [2022-07-13 21:59:07,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2022-07-13 21:59:07,665 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 5 predicate places. [2022-07-13 21:59:07,665 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 375 flow [2022-07-13 21:59:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-13 21:59:07,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:07,666 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:07,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:59:07,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1044558726, now seen corresponding path program 1 times [2022-07-13 21:59:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702932731] [2022-07-13 21:59:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:07,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:07,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 21:59:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173831581] [2022-07-13 21:59:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:07,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:07,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:59:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:08,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:08,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:08,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702932731] [2022-07-13 21:59:08,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 21:59:08,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173831581] [2022-07-13 21:59:08,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173831581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:08,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:59:08,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 21:59:08,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539172573] [2022-07-13 21:59:08,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:08,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:59:08,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:59:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:59:08,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 198 [2022-07-13 21:59:08,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 375 flow. Second operand has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-13 21:59:08,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:08,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 198 [2022-07-13 21:59:08,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:08,292 INFO L129 PetriNetUnfolder]: 6/389 cut-off events. [2022-07-13 21:59:08,293 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:59:08,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 389 events. 6/389 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 4/384 useless extension candidates. Maximal degree in co-relation 446. Up to 10 conditions per place. [2022-07-13 21:59:08,295 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 11 selfloop transitions, 9 changer transitions 0/186 dead transitions. [2022-07-13 21:59:08,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 186 transitions, 437 flow [2022-07-13 21:59:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1543 transitions. [2022-07-13 21:59:08,299 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8658810325476992 [2022-07-13 21:59:08,299 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1543 transitions. [2022-07-13 21:59:08,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1543 transitions. [2022-07-13 21:59:08,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:08,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1543 transitions. [2022-07-13 21:59:08,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.44444444444446) internal successors, (1543), 9 states have internal predecessors, (1543), 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) [2022-07-13 21:59:08,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 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) [2022-07-13 21:59:08,309 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 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) [2022-07-13 21:59:08,309 INFO L186 Difference]: Start difference. First operand has 178 places, 176 transitions, 375 flow. Second operand 9 states and 1543 transitions. [2022-07-13 21:59:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 186 transitions, 437 flow [2022-07-13 21:59:08,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 186 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:08,314 INFO L242 Difference]: Finished difference. Result has 188 places, 182 transitions, 423 flow [2022-07-13 21:59:08,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=188, PETRI_TRANSITIONS=182} [2022-07-13 21:59:08,315 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 15 predicate places. [2022-07-13 21:59:08,316 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 423 flow [2022-07-13 21:59:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-07-13 21:59:08,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:08,317 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:08,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:08,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:08,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -164053402, now seen corresponding path program 2 times [2022-07-13 21:59:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:08,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928206513] [2022-07-13 21:59:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:08,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 21:59:08,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354796283] [2022-07-13 21:59:08,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:59:08,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:08,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:08,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:08,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:59:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:59:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:59:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:09,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:59:09,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928206513] [2022-07-13 21:59:09,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 21:59:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354796283] [2022-07-13 21:59:09,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354796283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:09,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:59:09,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-13 21:59:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661014073] [2022-07-13 21:59:09,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 21:59:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 21:59:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:59:09,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 198 [2022-07-13 21:59:09,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 423 flow. Second operand has 16 states, 16 states have (on average 171.25) internal successors, (2740), 16 states have internal predecessors, (2740), 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) [2022-07-13 21:59:09,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:09,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 198 [2022-07-13 21:59:09,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:09,604 INFO L129 PetriNetUnfolder]: 6/685 cut-off events. [2022-07-13 21:59:09,604 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-13 21:59:09,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 685 events. 6/685 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 8/684 useless extension candidates. Maximal degree in co-relation 876. Up to 22 conditions per place. [2022-07-13 21:59:09,607 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 19 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2022-07-13 21:59:09,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 206 transitions, 611 flow [2022-07-13 21:59:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3593 transitions. [2022-07-13 21:59:09,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8641173641173642 [2022-07-13 21:59:09,617 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3593 transitions. [2022-07-13 21:59:09,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3593 transitions. [2022-07-13 21:59:09,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:09,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3593 transitions. [2022-07-13 21:59:09,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.0952380952381) internal successors, (3593), 21 states have internal predecessors, (3593), 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) [2022-07-13 21:59:09,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 198.0) internal successors, (4356), 22 states have internal predecessors, (4356), 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) [2022-07-13 21:59:09,640 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 198.0) internal successors, (4356), 22 states have internal predecessors, (4356), 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) [2022-07-13 21:59:09,640 INFO L186 Difference]: Start difference. First operand has 188 places, 182 transitions, 423 flow. Second operand 21 states and 3593 transitions. [2022-07-13 21:59:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 206 transitions, 611 flow [2022-07-13 21:59:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 206 transitions, 597 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:09,647 INFO L242 Difference]: Finished difference. Result has 212 places, 195 transitions, 547 flow [2022-07-13 21:59:09,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=212, PETRI_TRANSITIONS=195} [2022-07-13 21:59:09,650 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 39 predicate places. [2022-07-13 21:59:09,651 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 195 transitions, 547 flow [2022-07-13 21:59:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 171.25) internal successors, (2740), 16 states have internal predecessors, (2740), 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) [2022-07-13 21:59:09,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:09,654 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:09,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:09,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -661287898, now seen corresponding path program 3 times [2022-07-13 21:59:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407887598] [2022-07-13 21:59:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:09,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 21:59:09,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122885044] [2022-07-13 21:59:09,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:59:09,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:09,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:09,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:09,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:59:10,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 21:59:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:59:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-13 21:59:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-13 21:59:10,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:10,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407887598] [2022-07-13 21:59:10,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 21:59:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122885044] [2022-07-13 21:59:10,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122885044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:10,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:59:10,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 21:59:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122832893] [2022-07-13 21:59:10,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:59:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:59:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:59:10,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 198 [2022-07-13 21:59:10,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 195 transitions, 547 flow. Second operand has 8 states, 8 states have (on average 168.75) internal successors, (1350), 8 states have internal predecessors, (1350), 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) [2022-07-13 21:59:10,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:10,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 198 [2022-07-13 21:59:10,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:11,115 INFO L129 PetriNetUnfolder]: 7/961 cut-off events. [2022-07-13 21:59:11,115 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-13 21:59:11,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 961 events. 7/961 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 1283. Up to 33 conditions per place. [2022-07-13 21:59:11,118 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 20 selfloop transitions, 9 changer transitions 0/211 dead transitions. [2022-07-13 21:59:11,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 211 transitions, 639 flow [2022-07-13 21:59:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1525 transitions. [2022-07-13 21:59:11,121 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8557800224466892 [2022-07-13 21:59:11,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1525 transitions. [2022-07-13 21:59:11,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1525 transitions. [2022-07-13 21:59:11,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:11,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1525 transitions. [2022-07-13 21:59:11,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.44444444444446) internal successors, (1525), 9 states have internal predecessors, (1525), 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) [2022-07-13 21:59:11,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 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) [2022-07-13 21:59:11,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 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) [2022-07-13 21:59:11,130 INFO L186 Difference]: Start difference. First operand has 212 places, 195 transitions, 547 flow. Second operand 9 states and 1525 transitions. [2022-07-13 21:59:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 211 transitions, 639 flow [2022-07-13 21:59:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 211 transitions, 615 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:11,136 INFO L242 Difference]: Finished difference. Result has 217 places, 201 transitions, 573 flow [2022-07-13 21:59:11,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=573, PETRI_PLACES=217, PETRI_TRANSITIONS=201} [2022-07-13 21:59:11,137 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 44 predicate places. [2022-07-13 21:59:11,137 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 201 transitions, 573 flow [2022-07-13 21:59:11,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 168.75) internal successors, (1350), 8 states have internal predecessors, (1350), 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) [2022-07-13 21:59:11,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:11,139 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:11,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:11,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1711580474, now seen corresponding path program 4 times [2022-07-13 21:59:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:11,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432446483] [2022-07-13 21:59:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:11,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 21:59:11,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800482140] [2022-07-13 21:59:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:59:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:11,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:11,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:59:12,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:59:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:59:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 3370 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-13 21:59:13,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-13 21:59:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432446483] [2022-07-13 21:59:14,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 21:59:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800482140] [2022-07-13 21:59:14,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800482140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:14,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:59:14,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-13 21:59:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170701217] [2022-07-13 21:59:14,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:14,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 21:59:14,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 21:59:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:59:14,135 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 198 [2022-07-13 21:59:14,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 201 transitions, 573 flow. Second operand has 16 states, 16 states have (on average 169.375) internal successors, (2710), 16 states have internal predecessors, (2710), 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) [2022-07-13 21:59:14,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:14,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 198 [2022-07-13 21:59:14,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:14,986 INFO L129 PetriNetUnfolder]: 11/2057 cut-off events. [2022-07-13 21:59:14,986 INFO L130 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2022-07-13 21:59:14,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 2057 events. 11/2057 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 169 event pairs, 0 based on Foata normal form. 4/2052 useless extension candidates. Maximal degree in co-relation 2755. Up to 70 conditions per place. [2022-07-13 21:59:14,992 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 40 selfloop transitions, 21 changer transitions 0/243 dead transitions. [2022-07-13 21:59:14,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 243 transitions, 839 flow [2022-07-13 21:59:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3551 transitions. [2022-07-13 21:59:14,999 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.854016354016354 [2022-07-13 21:59:14,999 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3551 transitions. [2022-07-13 21:59:15,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3551 transitions. [2022-07-13 21:59:15,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:15,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3551 transitions. [2022-07-13 21:59:15,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 169.0952380952381) internal successors, (3551), 21 states have internal predecessors, (3551), 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) [2022-07-13 21:59:15,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 198.0) internal successors, (4356), 22 states have internal predecessors, (4356), 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) [2022-07-13 21:59:15,020 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 198.0) internal successors, (4356), 22 states have internal predecessors, (4356), 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) [2022-07-13 21:59:15,020 INFO L186 Difference]: Start difference. First operand has 217 places, 201 transitions, 573 flow. Second operand 21 states and 3551 transitions. [2022-07-13 21:59:15,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 243 transitions, 839 flow [2022-07-13 21:59:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 243 transitions, 825 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:15,027 INFO L242 Difference]: Finished difference. Result has 241 places, 214 transitions, 697 flow [2022-07-13 21:59:15,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=697, PETRI_PLACES=241, PETRI_TRANSITIONS=214} [2022-07-13 21:59:15,029 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 68 predicate places. [2022-07-13 21:59:15,029 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 214 transitions, 697 flow [2022-07-13 21:59:15,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 169.375) internal successors, (2710), 16 states have internal predecessors, (2710), 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) [2022-07-13 21:59:15,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:15,031 INFO L200 CegarLoopForPetriNet]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:15,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:15,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:15,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:59:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -825884666, now seen corresponding path program 5 times [2022-07-13 21:59:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168543132] [2022-07-13 21:59:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:15,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 21:59:15,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495699685] [2022-07-13 21:59:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:59:15,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:15,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:59:15,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process