./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 791161d1 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-?-791161d [2022-07-22 21:35:53,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:35:53,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:35:53,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:35:53,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:35:53,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:35:53,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:35:53,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:35:53,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:35:53,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:35:53,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:35:53,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:35:53,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:35:53,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:35:53,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:35:53,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:35:53,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:35:53,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:35:53,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:35:53,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:35:53,656 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:35:53,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:35:53,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:35:53,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:35:53,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:35:53,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:35:53,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:35:53,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:35:53,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:35:53,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:35:53,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:35:53,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:35:53,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:35:53,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:35:53,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:35:53,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:35:53,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:35:53,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:35:53,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:35:53,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:35:53,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:35:53,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:35:53,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:35:53,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:35:53,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:35:53,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:35:53,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:35:53,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:35:53,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:35:53,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:35:53,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:35:53,705 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:35:53,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:35:53,706 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:35:53,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:35:53,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:35:53,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:35:53,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:35:53,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:35:53,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:35:53,707 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:35:53,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:35:53,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:35:53,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:35:53,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:35:53,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:35:53,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:35:53,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:35:53,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:35:53,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:35:53,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:35:53,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:35:53,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:35:53,710 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:35:53,710 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:35:53,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:35:53,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2022-07-22 21:35:53,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:35:53,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:35:53,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:35:53,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:35:53,934 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:35:53,935 INFO L432 ainManager$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 [2022-07-22 21:35:53,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21347351/a0ca6834e28c4612b0034d142eec5cf5/FLAG750bf3bf0 [2022-07-22 21:35:54,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:35:54,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2022-07-22 21:35:54,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21347351/a0ca6834e28c4612b0034d142eec5cf5/FLAG750bf3bf0 [2022-07-22 21:35:54,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21347351/a0ca6834e28c4612b0034d142eec5cf5 [2022-07-22 21:35:54,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:35:54,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:35:54,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:35:54,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:35:54,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:35:54,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:35:54" (1/1) ... [2022-07-22 21:35:54,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e161ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:54, skipping insertion in model container [2022-07-22 21:35:54,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:35:54" (1/1) ... [2022-07-22 21:35:54,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:35:54,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:35:54,890 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] [2022-07-22 21:35:54,906 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,906 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,907 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,907 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:35:54,947 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:35:54,983 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] [2022-07-22 21:35:54,991 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,991 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,991 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:54,992 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-22 21:35:55,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:35:55,045 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:35:55,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55 WrapperNode [2022-07-22 21:35:55,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:35:55,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:35:55,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:35:55,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:35:55,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,107 INFO L137 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 182 [2022-07-22 21:35:55,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:35:55,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:35:55,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:35:55,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:35:55,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:35:55,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:35:55,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:35:55,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:35:55,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (1/1) ... [2022-07-22 21:35:55,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:35:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:35:55,173 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) [2022-07-22 21:35:55,187 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 [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:35:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:35:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:35:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:35:55,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:35:55,211 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:35:55,353 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:35:55,358 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:35:55,608 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:35:55,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:35:55,616 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-22 21:35:55,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:35:55 BoogieIcfgContainer [2022-07-22 21:35:55,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:35:55,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:35:55,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:35:55,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:35:55,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:35:54" (1/3) ... [2022-07-22 21:35:55,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15737360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:35:55, skipping insertion in model container [2022-07-22 21:35:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:35:55" (2/3) ... [2022-07-22 21:35:55,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15737360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:35:55, skipping insertion in model container [2022-07-22 21:35:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:35:55" (3/3) ... [2022-07-22 21:35:55,625 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2022-07-22 21:35:55,630 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:35:55,637 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:35:55,637 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:35:55,637 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:35:55,717 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:35:55,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 198 transitions, 404 flow [2022-07-22 21:35:55,797 INFO L129 PetriNetUnfolder]: 26/215 cut-off events. [2022-07-22 21:35:55,798 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-22 21:35:55,803 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. [2022-07-22 21:35:55,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 198 transitions, 404 flow [2022-07-22 21:35:55,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 391 flow [2022-07-22 21:35:55,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:35:55,823 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@2356fe07, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@538c6c5a [2022-07-22 21:35:55,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:35:55,838 INFO L129 PetriNetUnfolder]: 7/95 cut-off events. [2022-07-22 21:35:55,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:35:55,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:55,843 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] [2022-07-22 21:35:55,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1142359860, now seen corresponding path program 1 times [2022-07-22 21:35:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:55,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572464887] [2022-07-22 21:35:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:35:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:56,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572464887] [2022-07-22 21:35:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572464887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:35:56,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:35:56,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:35:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150176762] [2022-07-22 21:35:56,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:35:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:35:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:35:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:35:56,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 198 [2022-07-22 21:35:56,083 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) [2022-07-22 21:35:56,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:56,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 198 [2022-07-22 21:35:56,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:56,138 INFO L129 PetriNetUnfolder]: 5/189 cut-off events. [2022-07-22 21:35:56,140 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:35:56,141 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. [2022-07-22 21:35:56,143 INFO L132 encePairwiseOnDemand]: 180/198 looper letters, 1 selfloop transitions, 0 changer transitions 0/174 dead transitions. [2022-07-22 21:35:56,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 174 transitions, 355 flow [2022-07-22 21:35:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:35:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:35:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2022-07-22 21:35:56,159 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9419191919191919 [2022-07-22 21:35:56,163 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2022-07-22 21:35:56,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2022-07-22 21:35:56,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:56,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2022-07-22 21:35:56,174 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) [2022-07-22 21:35:56,181 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) [2022-07-22 21:35:56,181 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) [2022-07-22 21:35:56,183 INFO L186 Difference]: Start difference. First operand has 173 places, 193 transitions, 391 flow. Second operand 2 states and 373 transitions. [2022-07-22 21:35:56,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 174 transitions, 355 flow [2022-07-22 21:35:56,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 174 transitions, 355 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:35:56,196 INFO L242 Difference]: Finished difference. Result has 173 places, 174 transitions, 353 flow [2022-07-22 21:35:56,197 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} [2022-07-22 21:35:56,202 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 0 predicate places. [2022-07-22 21:35:56,203 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 174 transitions, 353 flow [2022-07-22 21:35:56,203 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) [2022-07-22 21:35:56,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:56,204 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] [2022-07-22 21:35:56,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:35:56,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2139432213, now seen corresponding path program 1 times [2022-07-22 21:35:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:56,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769189913] [2022-07-22 21:35:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:35:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:56,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769189913] [2022-07-22 21:35:56,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769189913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:35:56,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:35:56,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:35:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618575577] [2022-07-22 21:35:56,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:35:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:35:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:35:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:35:56,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 198 [2022-07-22 21:35:56,302 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) [2022-07-22 21:35:56,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:56,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 198 [2022-07-22 21:35:56,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:56,356 INFO L129 PetriNetUnfolder]: 6/239 cut-off events. [2022-07-22 21:35:56,356 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:35:56,357 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. [2022-07-22 21:35:56,357 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 16 selfloop transitions, 2 changer transitions 0/181 dead transitions. [2022-07-22 21:35:56,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 181 transitions, 403 flow [2022-07-22 21:35:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:35:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:35:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2022-07-22 21:35:56,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-07-22 21:35:56,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2022-07-22 21:35:56,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2022-07-22 21:35:56,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:56,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2022-07-22 21:35:56,366 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) [2022-07-22 21:35:56,369 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) [2022-07-22 21:35:56,369 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) [2022-07-22 21:35:56,370 INFO L186 Difference]: Start difference. First operand has 173 places, 174 transitions, 353 flow. Second operand 3 states and 520 transitions. [2022-07-22 21:35:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 181 transitions, 403 flow [2022-07-22 21:35:56,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 181 transitions, 403 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:35:56,377 INFO L242 Difference]: Finished difference. Result has 176 places, 175 transitions, 365 flow [2022-07-22 21:35:56,377 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} [2022-07-22 21:35:56,378 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 3 predicate places. [2022-07-22 21:35:56,378 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 175 transitions, 365 flow [2022-07-22 21:35:56,378 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) [2022-07-22 21:35:56,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:56,379 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] [2022-07-22 21:35:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:35:56,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1418231055, now seen corresponding path program 1 times [2022-07-22 21:35:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:56,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79165392] [2022-07-22 21:35:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:35:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79165392] [2022-07-22 21:35:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79165392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:35:56,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:35:56,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:35:56,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839960932] [2022-07-22 21:35:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:35:56,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:35:56,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:35:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:35:56,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 198 [2022-07-22 21:35:56,452 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) [2022-07-22 21:35:56,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:56,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 198 [2022-07-22 21:35:56,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:56,529 INFO L129 PetriNetUnfolder]: 6/311 cut-off events. [2022-07-22 21:35:56,529 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:35:56,530 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. [2022-07-22 21:35:56,531 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 10 selfloop transitions, 2 changer transitions 0/179 dead transitions. [2022-07-22 21:35:56,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 179 transitions, 397 flow [2022-07-22 21:35:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:35:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:35:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2022-07-22 21:35:56,542 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8804713804713805 [2022-07-22 21:35:56,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2022-07-22 21:35:56,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2022-07-22 21:35:56,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:56,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2022-07-22 21:35:56,544 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) [2022-07-22 21:35:56,545 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) [2022-07-22 21:35:56,546 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) [2022-07-22 21:35:56,546 INFO L186 Difference]: Start difference. First operand has 176 places, 175 transitions, 365 flow. Second operand 3 states and 523 transitions. [2022-07-22 21:35:56,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 179 transitions, 397 flow [2022-07-22 21:35:56,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 179 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:35:56,552 INFO L242 Difference]: Finished difference. Result has 178 places, 176 transitions, 375 flow [2022-07-22 21:35:56,553 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} [2022-07-22 21:35:56,555 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 5 predicate places. [2022-07-22 21:35:56,555 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 375 flow [2022-07-22 21:35:56,556 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) [2022-07-22 21:35:56,556 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:56,556 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] [2022-07-22 21:35:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:35:56,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1044558726, now seen corresponding path program 1 times [2022-07-22 21:35:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711267846] [2022-07-22 21:35:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:56,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:35:56,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333144814] [2022-07-22 21:35:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:35:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:35:56,636 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) [2022-07-22 21:35:56,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:35:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:35:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:35:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:35:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:56,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:35:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:56,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711267846] [2022-07-22 21:35:56,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:35:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333144814] [2022-07-22 21:35:56,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333144814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:35:56,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:35:56,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 21:35:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480032866] [2022-07-22 21:35:56,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:35:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:35:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:35:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:35:56,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 198 [2022-07-22 21:35:56,987 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) [2022-07-22 21:35:56,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:56,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 198 [2022-07-22 21:35:56,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:57,126 INFO L129 PetriNetUnfolder]: 6/389 cut-off events. [2022-07-22 21:35:57,127 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:35:57,132 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. [2022-07-22 21:35:57,133 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 11 selfloop transitions, 9 changer transitions 0/186 dead transitions. [2022-07-22 21:35:57,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 186 transitions, 437 flow [2022-07-22 21:35:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:35:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:35:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1543 transitions. [2022-07-22 21:35:57,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8658810325476992 [2022-07-22 21:35:57,137 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1543 transitions. [2022-07-22 21:35:57,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1543 transitions. [2022-07-22 21:35:57,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:57,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1543 transitions. [2022-07-22 21:35:57,143 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) [2022-07-22 21:35:57,146 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) [2022-07-22 21:35:57,147 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) [2022-07-22 21:35:57,148 INFO L186 Difference]: Start difference. First operand has 178 places, 176 transitions, 375 flow. Second operand 9 states and 1543 transitions. [2022-07-22 21:35:57,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 186 transitions, 437 flow [2022-07-22 21:35:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 186 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:35:57,152 INFO L242 Difference]: Finished difference. Result has 188 places, 182 transitions, 423 flow [2022-07-22 21:35:57,152 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} [2022-07-22 21:35:57,154 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 15 predicate places. [2022-07-22 21:35:57,154 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 423 flow [2022-07-22 21:35:57,155 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) [2022-07-22 21:35:57,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:57,156 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] [2022-07-22 21:35:57,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:35:57,371 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 [2022-07-22 21:35:57,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash -164053402, now seen corresponding path program 2 times [2022-07-22 21:35:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:57,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965986972] [2022-07-22 21:35:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:57,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:35:57,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553494316] [2022-07-22 21:35:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:35:57,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:35:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:35:57,442 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) [2022-07-22 21:35:57,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:35:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:35:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:35:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:35:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:35:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:57,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:35:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:35:58,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:58,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965986972] [2022-07-22 21:35:58,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:35:58,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553494316] [2022-07-22 21:35:58,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553494316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:35:58,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:35:58,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 21:35:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386303680] [2022-07-22 21:35:58,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:35:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:35:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:35:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:35:58,085 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 198 [2022-07-22 21:35:58,089 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) [2022-07-22 21:35:58,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:58,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 198 [2022-07-22 21:35:58,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:58,357 INFO L129 PetriNetUnfolder]: 6/685 cut-off events. [2022-07-22 21:35:58,357 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-22 21:35:58,360 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. [2022-07-22 21:35:58,361 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 19 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2022-07-22 21:35:58,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 206 transitions, 611 flow [2022-07-22 21:35:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:35:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:35:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3593 transitions. [2022-07-22 21:35:58,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8641173641173642 [2022-07-22 21:35:58,369 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3593 transitions. [2022-07-22 21:35:58,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3593 transitions. [2022-07-22 21:35:58,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:58,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3593 transitions. [2022-07-22 21:35:58,378 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) [2022-07-22 21:35:58,384 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) [2022-07-22 21:35:58,385 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) [2022-07-22 21:35:58,386 INFO L186 Difference]: Start difference. First operand has 188 places, 182 transitions, 423 flow. Second operand 21 states and 3593 transitions. [2022-07-22 21:35:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 206 transitions, 611 flow [2022-07-22 21:35:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 206 transitions, 597 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:35:58,416 INFO L242 Difference]: Finished difference. Result has 212 places, 195 transitions, 547 flow [2022-07-22 21:35:58,417 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} [2022-07-22 21:35:58,419 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 39 predicate places. [2022-07-22 21:35:58,419 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 195 transitions, 547 flow [2022-07-22 21:35:58,422 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) [2022-07-22 21:35:58,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:58,422 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] [2022-07-22 21:35:58,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:35:58,644 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 [2022-07-22 21:35:58,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:35:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:35:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash -661287898, now seen corresponding path program 3 times [2022-07-22 21:35:58,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:35:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345290670] [2022-07-22 21:35:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:35:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:35:58,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:35:58,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446016821] [2022-07-22 21:35:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:35:58,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:35:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:35:58,702 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) [2022-07-22 21:35:58,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:35:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:35:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:35:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:35:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:35:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-22 21:35:59,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:35:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-22 21:35:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:35:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345290670] [2022-07-22 21:35:59,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:35:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446016821] [2022-07-22 21:35:59,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446016821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:35:59,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:35:59,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 21:35:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717005464] [2022-07-22 21:35:59,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:35:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:35:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:35:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:35:59,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:35:59,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 198 [2022-07-22 21:35:59,580 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) [2022-07-22 21:35:59,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:35:59,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 198 [2022-07-22 21:35:59,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:35:59,845 INFO L129 PetriNetUnfolder]: 7/961 cut-off events. [2022-07-22 21:35:59,846 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-22 21:35:59,847 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. [2022-07-22 21:35:59,849 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 20 selfloop transitions, 9 changer transitions 0/211 dead transitions. [2022-07-22 21:35:59,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 211 transitions, 639 flow [2022-07-22 21:35:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:35:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:35:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1525 transitions. [2022-07-22 21:35:59,853 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8557800224466892 [2022-07-22 21:35:59,853 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1525 transitions. [2022-07-22 21:35:59,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1525 transitions. [2022-07-22 21:35:59,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:35:59,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1525 transitions. [2022-07-22 21:35:59,857 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) [2022-07-22 21:35:59,860 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) [2022-07-22 21:35:59,861 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) [2022-07-22 21:35:59,861 INFO L186 Difference]: Start difference. First operand has 212 places, 195 transitions, 547 flow. Second operand 9 states and 1525 transitions. [2022-07-22 21:35:59,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 211 transitions, 639 flow [2022-07-22 21:35:59,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 211 transitions, 615 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-22 21:35:59,868 INFO L242 Difference]: Finished difference. Result has 217 places, 201 transitions, 573 flow [2022-07-22 21:35:59,868 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} [2022-07-22 21:35:59,869 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 44 predicate places. [2022-07-22 21:35:59,869 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 201 transitions, 573 flow [2022-07-22 21:35:59,870 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) [2022-07-22 21:35:59,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:35:59,870 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] [2022-07-22 21:35:59,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:00,083 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 [2022-07-22 21:36:00,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:36:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1711580474, now seen corresponding path program 4 times [2022-07-22 21:36:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808437976] [2022-07-22 21:36:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:00,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:36:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509464273] [2022-07-22 21:36:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:36:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:00,224 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) [2022-07-22 21:36:00,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:36:00,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:36:00,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:36:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 3370 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:36:00,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-22 21:36:01,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-22 21:36:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:02,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808437976] [2022-07-22 21:36:02,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:36:02,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509464273] [2022-07-22 21:36:02,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509464273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:36:02,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:02,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 21:36:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061877016] [2022-07-22 21:36:02,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:36:02,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:36:02,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:02,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:36:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:36:02,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 198 [2022-07-22 21:36:02,905 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) [2022-07-22 21:36:02,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:02,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 198 [2022-07-22 21:36:02,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:03,747 INFO L129 PetriNetUnfolder]: 11/2057 cut-off events. [2022-07-22 21:36:03,747 INFO L130 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2022-07-22 21:36:03,750 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. [2022-07-22 21:36:03,754 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 40 selfloop transitions, 21 changer transitions 0/243 dead transitions. [2022-07-22 21:36:03,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 243 transitions, 839 flow [2022-07-22 21:36:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:36:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:36:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3551 transitions. [2022-07-22 21:36:03,762 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.854016354016354 [2022-07-22 21:36:03,762 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3551 transitions. [2022-07-22 21:36:03,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3551 transitions. [2022-07-22 21:36:03,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:03,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3551 transitions. [2022-07-22 21:36:03,771 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) [2022-07-22 21:36:03,778 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) [2022-07-22 21:36:03,779 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) [2022-07-22 21:36:03,779 INFO L186 Difference]: Start difference. First operand has 217 places, 201 transitions, 573 flow. Second operand 21 states and 3551 transitions. [2022-07-22 21:36:03,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 243 transitions, 839 flow [2022-07-22 21:36:03,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 243 transitions, 825 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:36:03,787 INFO L242 Difference]: Finished difference. Result has 241 places, 214 transitions, 697 flow [2022-07-22 21:36:03,787 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} [2022-07-22 21:36:03,788 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 68 predicate places. [2022-07-22 21:36:03,788 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 214 transitions, 697 flow [2022-07-22 21:36:03,789 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) [2022-07-22 21:36:03,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:03,790 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] [2022-07-22 21:36:03,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:04,006 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 [2022-07-22 21:36:04,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:36:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash -825884666, now seen corresponding path program 5 times [2022-07-22 21:36:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599279788] [2022-07-22 21:36:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:04,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:36:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713970127] [2022-07-22 21:36:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:36:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:04,259 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) [2022-07-22 21:36:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process