./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_93-evilcollapse_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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:53:31,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:53:31,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:53:31,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:53:31,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:53:31,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:53:31,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:53:31,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:53:31,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:53:31,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:53:31,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:53:31,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:53:31,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:53:31,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:53:31,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:53:31,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:53:31,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:53:31,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:53:31,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:53:31,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:53:31,568 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:53:31,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:53:31,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:53:31,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:53:31,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:53:31,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:53:31,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:53:31,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:53:31,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:53:31,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:53:31,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:53:31,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:53:31,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:53:31,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:53:31,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:53:31,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:53:31,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:53:31,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:53:31,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:53:31,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:53:31,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:53:31,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:53:31,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:53:31,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:53:31,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:53:31,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:53:31,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:53:31,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:53:31,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:53:31,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:53:31,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:53:31,598 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:53:31,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:53:31,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:53:31,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:53:31,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:53:31,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:53:31,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:53:31,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:53:31,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:53:31,608 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:53:31,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:53:31,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:53:31,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:53:31,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:53:31,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:53:31,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:53:31,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:31,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:53:31,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:53:31,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:53:31,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:53:31,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:53:31,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:53:31,611 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:53:31,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:53:31,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2022-07-21 08:53:31,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:53:31,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:53:31,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:53:31,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:53:31,930 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:53:31,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-21 08:53:31,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80361d38/6bda1cca8ed34d56abb2fc22f70c8219/FLAG6b55efa21 [2022-07-21 08:53:32,428 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:53:32,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-21 08:53:32,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80361d38/6bda1cca8ed34d56abb2fc22f70c8219/FLAG6b55efa21 [2022-07-21 08:53:32,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80361d38/6bda1cca8ed34d56abb2fc22f70c8219 [2022-07-21 08:53:32,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:53:32,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:53:32,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:32,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:53:32,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:53:32,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:32" (1/1) ... [2022-07-21 08:53:32,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722f7262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:32, skipping insertion in model container [2022-07-21 08:53:32,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:32" (1/1) ... [2022-07-21 08:53:32,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:53:33,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:53:33,310 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_93-evilcollapse_racefree.i[47038,47051] [2022-07-21 08:53:33,323 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,324 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,325 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,325 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:33,367 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:53:33,398 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_93-evilcollapse_racefree.i[47038,47051] [2022-07-21 08:53:33,400 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,400 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,400 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,401 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-21 08:53:33,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:33,459 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:53:33,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33 WrapperNode [2022-07-21 08:53:33,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:33,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:33,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:53:33,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:53:33,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,524 INFO L137 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 223 [2022-07-21 08:53:33,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:33,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:53:33,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:53:33,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:53:33,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:53:33,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:53:33,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:53:33,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:53:33,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (1/1) ... [2022-07-21 08:53:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:33,604 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) [2022-07-21 08:53:33,614 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 [2022-07-21 08:53:33,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:53:33,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 08:53:33,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 08:53:33,629 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:53:33,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:53:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:53:33,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:53:33,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:53:33,631 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:53:33,736 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:53:33,737 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:53:34,100 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:53:34,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:53:34,110 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-21 08:53:34,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:34 BoogieIcfgContainer [2022-07-21 08:53:34,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:53:34,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:53:34,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:53:34,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:53:34,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:53:32" (1/3) ... [2022-07-21 08:53:34,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246d61d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:34, skipping insertion in model container [2022-07-21 08:53:34,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:33" (2/3) ... [2022-07-21 08:53:34,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246d61d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:34, skipping insertion in model container [2022-07-21 08:53:34,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:34" (3/3) ... [2022-07-21 08:53:34,119 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2022-07-21 08:53:34,123 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:53:34,129 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:53:34,129 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:53:34,129 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:53:34,211 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:53:34,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 256 transitions, 520 flow [2022-07-21 08:53:34,338 INFO L129 PetriNetUnfolder]: 29/273 cut-off events. [2022-07-21 08:53:34,339 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-21 08:53:34,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 29/273 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 585 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 155. Up to 4 conditions per place. [2022-07-21 08:53:34,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 256 transitions, 520 flow [2022-07-21 08:53:34,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 251 transitions, 507 flow [2022-07-21 08:53:34,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:34,367 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@7d588e57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@249d4255 [2022-07-21 08:53:34,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:53:34,398 INFO L129 PetriNetUnfolder]: 10/177 cut-off events. [2022-07-21 08:53:34,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:34,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:34,400 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] [2022-07-21 08:53:34,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1684978418, now seen corresponding path program 1 times [2022-07-21 08:53:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:34,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905636946] [2022-07-21 08:53:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:34,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905636946] [2022-07-21 08:53:34,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905636946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:34,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:34,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459790408] [2022-07-21 08:53:34,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:34,638 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 256 [2022-07-21 08:53:34,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 251 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-21 08:53:34,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:34,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 256 [2022-07-21 08:53:34,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:34,687 INFO L129 PetriNetUnfolder]: 6/245 cut-off events. [2022-07-21 08:53:34,687 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:53:34,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 245 events. 6/245 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 440 event pairs, 0 based on Foata normal form. 22/253 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2022-07-21 08:53:34,689 INFO L132 encePairwiseOnDemand]: 236/256 looper letters, 1 selfloop transitions, 0 changer transitions 2/230 dead transitions. [2022-07-21 08:53:34,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 467 flow [2022-07-21 08:53:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 487 transitions. [2022-07-21 08:53:34,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.951171875 [2022-07-21 08:53:34,700 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 487 transitions. [2022-07-21 08:53:34,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 487 transitions. [2022-07-21 08:53:34,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:34,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 487 transitions. [2022-07-21 08:53:34,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2022-07-21 08:53:34,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-21 08:53:34,710 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-21 08:53:34,711 INFO L186 Difference]: Start difference. First operand has 228 places, 251 transitions, 507 flow. Second operand 2 states and 487 transitions. [2022-07-21 08:53:34,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 467 flow [2022-07-21 08:53:34,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 467 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:34,718 INFO L242 Difference]: Finished difference. Result has 228 places, 228 transitions, 461 flow [2022-07-21 08:53:34,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=461, PETRI_PLACES=228, PETRI_TRANSITIONS=228} [2022-07-21 08:53:34,724 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-21 08:53:34,724 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 228 transitions, 461 flow [2022-07-21 08:53:34,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-21 08:53:34,725 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:34,725 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] [2022-07-21 08:53:34,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:53:34,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1809051665, now seen corresponding path program 1 times [2022-07-21 08:53:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124459083] [2022-07-21 08:53:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124459083] [2022-07-21 08:53:34,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124459083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:34,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:34,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:34,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394388615] [2022-07-21 08:53:34,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:34,824 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 256 [2022-07-21 08:53:34,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 228 transitions, 461 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-21 08:53:34,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:34,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 256 [2022-07-21 08:53:34,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:34,889 INFO L129 PetriNetUnfolder]: 7/293 cut-off events. [2022-07-21 08:53:34,890 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:53:34,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 293 events. 7/293 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 617 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 314. Up to 12 conditions per place. [2022-07-21 08:53:34,891 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 16 selfloop transitions, 2 changer transitions 0/235 dead transitions. [2022-07-21 08:53:34,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 235 transitions, 511 flow [2022-07-21 08:53:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2022-07-21 08:53:34,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2022-07-21 08:53:34,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2022-07-21 08:53:34,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2022-07-21 08:53:34,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:34,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2022-07-21 08:53:34,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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) [2022-07-21 08:53:34,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-21 08:53:34,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-21 08:53:34,900 INFO L186 Difference]: Start difference. First operand has 228 places, 228 transitions, 461 flow. Second operand 3 states and 688 transitions. [2022-07-21 08:53:34,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 235 transitions, 511 flow [2022-07-21 08:53:34,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:34,908 INFO L242 Difference]: Finished difference. Result has 229 places, 229 transitions, 473 flow [2022-07-21 08:53:34,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=229, PETRI_TRANSITIONS=229} [2022-07-21 08:53:34,910 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 1 predicate places. [2022-07-21 08:53:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 229 transitions, 473 flow [2022-07-21 08:53:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-21 08:53:34,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:34,911 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] [2022-07-21 08:53:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:53:34,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1280121739, now seen corresponding path program 1 times [2022-07-21 08:53:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:34,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295861572] [2022-07-21 08:53:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:34,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295861572] [2022-07-21 08:53:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295861572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:34,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:34,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:34,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349088991] [2022-07-21 08:53:34,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:34,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:34,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:34,995 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 256 [2022-07-21 08:53:34,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 229 transitions, 473 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-21 08:53:34,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:34,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 256 [2022-07-21 08:53:34,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:35,057 INFO L129 PetriNetUnfolder]: 7/365 cut-off events. [2022-07-21 08:53:35,057 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:53:35,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 365 events. 7/365 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 717 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 395. Up to 15 conditions per place. [2022-07-21 08:53:35,060 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 10 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2022-07-21 08:53:35,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 505 flow [2022-07-21 08:53:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-07-21 08:53:35,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997395833333334 [2022-07-21 08:53:35,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-07-21 08:53:35,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-07-21 08:53:35,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:35,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-07-21 08:53:35,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2022-07-21 08:53:35,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-21 08:53:35,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-21 08:53:35,067 INFO L186 Difference]: Start difference. First operand has 229 places, 229 transitions, 473 flow. Second operand 3 states and 691 transitions. [2022-07-21 08:53:35,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 505 flow [2022-07-21 08:53:35,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 233 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:35,070 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 483 flow [2022-07-21 08:53:35,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-07-21 08:53:35,072 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 3 predicate places. [2022-07-21 08:53:35,072 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 483 flow [2022-07-21 08:53:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-21 08:53:35,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:35,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:35,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:53:35,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2086167297, now seen corresponding path program 1 times [2022-07-21 08:53:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:35,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020121648] [2022-07-21 08:53:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:35,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 08:53:35,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291230685] [2022-07-21 08:53:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:35,106 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) [2022-07-21 08:53:35,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:53:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:35,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:35,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020121648] [2022-07-21 08:53:35,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 08:53:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291230685] [2022-07-21 08:53:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291230685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:35,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:53:35,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 08:53:35,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618079097] [2022-07-21 08:53:35,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:53:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:53:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:53:35,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-21 08:53:35,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 483 flow. Second operand has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-21 08:53:35,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:35,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-21 08:53:35,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:35,455 INFO L129 PetriNetUnfolder]: 7/443 cut-off events. [2022-07-21 08:53:35,455 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:53:35,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 443 events. 7/443 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 4/437 useless extension candidates. Maximal degree in co-relation 500. Up to 10 conditions per place. [2022-07-21 08:53:35,457 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 11 selfloop transitions, 9 changer transitions 0/240 dead transitions. [2022-07-21 08:53:35,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 240 transitions, 545 flow [2022-07-21 08:53:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2047 transitions. [2022-07-21 08:53:35,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8884548611111112 [2022-07-21 08:53:35,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2047 transitions. [2022-07-21 08:53:35,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2047 transitions. [2022-07-21 08:53:35,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:35,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2047 transitions. [2022-07-21 08:53:35,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.44444444444446) internal successors, (2047), 9 states have internal predecessors, (2047), 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) [2022-07-21 08:53:35,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-21 08:53:35,468 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-21 08:53:35,468 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 483 flow. Second operand 9 states and 2047 transitions. [2022-07-21 08:53:35,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 240 transitions, 545 flow [2022-07-21 08:53:35,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 240 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:35,480 INFO L242 Difference]: Finished difference. Result has 241 places, 236 transitions, 531 flow [2022-07-21 08:53:35,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=531, PETRI_PLACES=241, PETRI_TRANSITIONS=236} [2022-07-21 08:53:35,482 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 13 predicate places. [2022-07-21 08:53:35,482 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 236 transitions, 531 flow [2022-07-21 08:53:35,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-21 08:53:35,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:35,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:35,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:35,695 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 [2022-07-21 08:53:35,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -216012479, now seen corresponding path program 2 times [2022-07-21 08:53:35,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932768889] [2022-07-21 08:53:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:35,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:35,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 08:53:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376622346] [2022-07-21 08:53:35,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:53:35,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:35,724 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) [2022-07-21 08:53:35,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:53:35,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:53:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:36,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:36,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932768889] [2022-07-21 08:53:36,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 08:53:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376622346] [2022-07-21 08:53:36,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376622346] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:36,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:53:36,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-21 08:53:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22481395] [2022-07-21 08:53:36,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 08:53:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 08:53:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:53:36,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-21 08:53:36,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 236 transitions, 531 flow. Second operand has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-21 08:53:36,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:36,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-21 08:53:36,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:36,402 INFO L129 PetriNetUnfolder]: 7/739 cut-off events. [2022-07-21 08:53:36,402 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-21 08:53:36,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 739 events. 7/739 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 8/737 useless extension candidates. Maximal degree in co-relation 930. Up to 22 conditions per place. [2022-07-21 08:53:36,404 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 19 selfloop transitions, 21 changer transitions 0/260 dead transitions. [2022-07-21 08:53:36,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 260 transitions, 719 flow [2022-07-21 08:53:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-07-21 08:53:36,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8870907738095238 [2022-07-21 08:53:36,412 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-07-21 08:53:36,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-07-21 08:53:36,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:36,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-07-21 08:53:36,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 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) [2022-07-21 08:53:36,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-21 08:53:36,429 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-21 08:53:36,429 INFO L186 Difference]: Start difference. First operand has 241 places, 236 transitions, 531 flow. Second operand 21 states and 4769 transitions. [2022-07-21 08:53:36,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 260 transitions, 719 flow [2022-07-21 08:53:36,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 260 transitions, 705 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:36,435 INFO L242 Difference]: Finished difference. Result has 265 places, 249 transitions, 655 flow [2022-07-21 08:53:36,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=655, PETRI_PLACES=265, PETRI_TRANSITIONS=249} [2022-07-21 08:53:36,436 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 37 predicate places. [2022-07-21 08:53:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 249 transitions, 655 flow [2022-07-21 08:53:36,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-21 08:53:36,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:36,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:36,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 08:53:36,674 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 [2022-07-21 08:53:36,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -361462335, now seen corresponding path program 3 times [2022-07-21 08:53:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5478664] [2022-07-21 08:53:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:36,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 08:53:36,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655755424] [2022-07-21 08:53:36,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:53:36,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:36,736 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) [2022-07-21 08:53:36,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:53:36,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 08:53:36,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-21 08:53:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-21 08:53:37,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:37,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5478664] [2022-07-21 08:53:37,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 08:53:37,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655755424] [2022-07-21 08:53:37,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655755424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:37,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:53:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 08:53:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035468914] [2022-07-21 08:53:37,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:37,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:53:37,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:53:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:53:37,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-21 08:53:37,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 249 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-21 08:53:37,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:37,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-21 08:53:37,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:37,899 INFO L129 PetriNetUnfolder]: 8/1015 cut-off events. [2022-07-21 08:53:37,899 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-07-21 08:53:37,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 1015 events. 8/1015 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 209 event pairs, 0 based on Foata normal form. 2/1007 useless extension candidates. Maximal degree in co-relation 1337. Up to 33 conditions per place. [2022-07-21 08:53:37,901 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 20 selfloop transitions, 9 changer transitions 0/265 dead transitions. [2022-07-21 08:53:37,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 265 transitions, 747 flow [2022-07-21 08:53:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2029 transitions. [2022-07-21 08:53:37,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806423611111112 [2022-07-21 08:53:37,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2029 transitions. [2022-07-21 08:53:37,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2029 transitions. [2022-07-21 08:53:37,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:37,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2029 transitions. [2022-07-21 08:53:37,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.44444444444446) internal successors, (2029), 9 states have internal predecessors, (2029), 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) [2022-07-21 08:53:37,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-21 08:53:37,913 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-21 08:53:37,913 INFO L186 Difference]: Start difference. First operand has 265 places, 249 transitions, 655 flow. Second operand 9 states and 2029 transitions. [2022-07-21 08:53:37,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 265 transitions, 747 flow [2022-07-21 08:53:37,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 265 transitions, 723 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:37,922 INFO L242 Difference]: Finished difference. Result has 270 places, 255 transitions, 681 flow [2022-07-21 08:53:37,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=270, PETRI_TRANSITIONS=255} [2022-07-21 08:53:37,935 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 42 predicate places. [2022-07-21 08:53:37,936 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 255 transitions, 681 flow [2022-07-21 08:53:37,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-21 08:53:37,936 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:37,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:37,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:38,137 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 [2022-07-21 08:53:38,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -165335103, now seen corresponding path program 4 times [2022-07-21 08:53:38,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:38,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277100583] [2022-07-21 08:53:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:38,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 08:53:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883084489] [2022-07-21 08:53:38,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 08:53:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:38,243 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) [2022-07-21 08:53:38,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:53:38,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 08:53:38,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3419 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-21 08:53:39,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-21 08:53:40,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277100583] [2022-07-21 08:53:40,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 08:53:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883084489] [2022-07-21 08:53:40,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883084489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:40,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:53:40,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-21 08:53:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627301928] [2022-07-21 08:53:40,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 08:53:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 08:53:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-21 08:53:40,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-21 08:53:40,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 255 transitions, 681 flow. Second operand has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-21 08:53:40,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:40,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-21 08:53:40,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:41,224 INFO L129 PetriNetUnfolder]: 12/2111 cut-off events. [2022-07-21 08:53:41,224 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-07-21 08:53:41,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 2111 events. 12/2111 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 213 event pairs, 0 based on Foata normal form. 4/2105 useless extension candidates. Maximal degree in co-relation 2809. Up to 70 conditions per place. [2022-07-21 08:53:41,228 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 40 selfloop transitions, 21 changer transitions 0/297 dead transitions. [2022-07-21 08:53:41,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 297 transitions, 947 flow [2022-07-21 08:53:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4727 transitions. [2022-07-21 08:53:41,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8792782738095238 [2022-07-21 08:53:41,235 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4727 transitions. [2022-07-21 08:53:41,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4727 transitions. [2022-07-21 08:53:41,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:41,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4727 transitions. [2022-07-21 08:53:41,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 225.0952380952381) internal successors, (4727), 21 states have internal predecessors, (4727), 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) [2022-07-21 08:53:41,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-21 08:53:41,249 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-21 08:53:41,249 INFO L186 Difference]: Start difference. First operand has 270 places, 255 transitions, 681 flow. Second operand 21 states and 4727 transitions. [2022-07-21 08:53:41,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 297 transitions, 947 flow [2022-07-21 08:53:41,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 297 transitions, 933 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:41,254 INFO L242 Difference]: Finished difference. Result has 294 places, 268 transitions, 805 flow [2022-07-21 08:53:41,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=805, PETRI_PLACES=294, PETRI_TRANSITIONS=268} [2022-07-21 08:53:41,255 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 66 predicate places. [2022-07-21 08:53:41,255 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 268 transitions, 805 flow [2022-07-21 08:53:41,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-21 08:53:41,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:41,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:41,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:41,471 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 [2022-07-21 08:53:41,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:53:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 178717633, now seen corresponding path program 5 times [2022-07-21 08:53:41,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611221023] [2022-07-21 08:53:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:41,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 08:53:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996819172] [2022-07-21 08:53:41,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 08:53:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:41,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:41,666 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) [2022-07-21 08:53:41,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process