./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:21:58,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:21:58,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:21:58,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:21:58,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:21:58,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:21:58,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:21:58,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:21:58,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:21:58,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:21:58,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:21:58,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:21:58,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:21:58,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:21:58,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:21:58,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:21:58,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:21:58,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:21:58,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:21:58,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:21:58,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:21:58,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:21:58,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:21:58,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:21:58,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:21:58,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:21:58,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:21:58,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:21:58,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:21:58,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:21:58,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:21:58,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:21:58,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:21:58,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:21:58,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:21:58,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:21:58,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:21:58,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:21:58,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:21:58,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:21:58,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:21:58,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:21:58,892 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:21:58,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:21:58,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:21:58,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:21:58,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:21:58,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:21:58,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:21:58,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:21:58,896 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:21:58,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:21:58,897 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:21:58,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:21:58,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:21:58,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:21:58,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:21:58,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:21:58,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:21:58,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:21:58,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:21:58,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:21:58,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:21:58,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:21:58,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:21:58,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:21:58,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:21:58,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:21:58,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:21:58,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:21:58,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:21:58,902 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:21:58,902 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:21:59,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:21:59,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:21:59,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:21:59,215 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:21:59,216 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:21:59,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-31 04:22:00,365 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:22:00,566 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:22:00,566 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-31 04:22:00,577 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548d6beed/8d60b77f157040199a2f46dcda1d111c/FLAGeee289798 [2023-08-31 04:22:00,597 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/548d6beed/8d60b77f157040199a2f46dcda1d111c [2023-08-31 04:22:00,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:22:00,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:22:00,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:22:00,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:22:00,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:22:00,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:22:00" (1/1) ... [2023-08-31 04:22:00,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9107d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:00, skipping insertion in model container [2023-08-31 04:22:00,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:22:00" (1/1) ... [2023-08-31 04:22:00,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:22:00,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:22:01,007 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-08-31 04:22:01,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-08-31 04:22:01,022 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-08-31 04:22:01,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:22:01,048 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:22:01,093 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-08-31 04:22:01,098 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-08-31 04:22:01,106 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-08-31 04:22:01,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:22:01,157 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:22:01,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01 WrapperNode [2023-08-31 04:22:01,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:22:01,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:22:01,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:22:01,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:22:01,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,226 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-08-31 04:22:01,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:22:01,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:22:01,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:22:01,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:22:01,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:22:01,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:22:01,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:22:01,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:22:01,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (1/1) ... [2023-08-31 04:22:01,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:22:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:01,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 04:22:01,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 04:22:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:22:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 04:22:01,359 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 04:22:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 04:22:01,359 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 04:22:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:22:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 04:22:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:22:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:22:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:22:01,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-31 04:22:01,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:22:01,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:22:01,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:22:01,362 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:22:01,526 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:22:01,530 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:22:01,817 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:22:01,824 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:22:01,824 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 04:22:01,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:22:01 BoogieIcfgContainer [2023-08-31 04:22:01,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:22:01,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:22:01,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:22:01,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:22:01,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:22:00" (1/3) ... [2023-08-31 04:22:01,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfa95a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:22:01, skipping insertion in model container [2023-08-31 04:22:01,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:22:01" (2/3) ... [2023-08-31 04:22:01,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfa95a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:22:01, skipping insertion in model container [2023-08-31 04:22:01,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:22:01" (3/3) ... [2023-08-31 04:22:01,848 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-08-31 04:22:01,856 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:22:01,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:22:01,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-31 04:22:01,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:22:01,971 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:22:02,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 312 flow [2023-08-31 04:22:02,086 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-08-31 04:22:02,086 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:22:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-31 04:22:02,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 148 transitions, 312 flow [2023-08-31 04:22:02,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 137 transitions, 283 flow [2023-08-31 04:22:02,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:22:02,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions, 283 flow [2023-08-31 04:22:02,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 137 transitions, 283 flow [2023-08-31 04:22:02,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 283 flow [2023-08-31 04:22:02,159 INFO L130 PetriNetUnfolder]: 11/137 cut-off events. [2023-08-31 04:22:02,159 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 04:22:02,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 11/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-31 04:22:02,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 4498 [2023-08-31 04:22:06,729 INFO L134 LiptonReduction]: Checked pairs total: 9988 [2023-08-31 04:22:06,730 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-31 04:22:06,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:22:06,745 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a8d9cf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:22:06,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 04:22:06,750 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-08-31 04:22:06,750 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 04:22:06,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:06,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 04:22:06,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:06,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash -249038413, now seen corresponding path program 1 times [2023-08-31 04:22:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:06,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525813422] [2023-08-31 04:22:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:06,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525813422] [2023-08-31 04:22:07,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525813422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:07,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:07,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:22:07,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105008949] [2023-08-31 04:22:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:07,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:22:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:22:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:22:07,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-31 04:22:07,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:07,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-31 04:22:07,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:07,457 INFO L130 PetriNetUnfolder]: 691/1209 cut-off events. [2023-08-31 04:22:07,457 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-31 04:22:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2360 conditions, 1209 events. 691/1209 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5241 event pairs, 225 based on Foata normal form. 36/944 useless extension candidates. Maximal degree in co-relation 2149. Up to 671 conditions per place. [2023-08-31 04:22:07,466 INFO L137 encePairwiseOnDemand]: 257/263 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-31 04:22:07,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 239 flow [2023-08-31 04:22:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:22:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:22:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-31 04:22:07,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678073510773131 [2023-08-31 04:22:07,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-31 04:22:07,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-31 04:22:07,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:07,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-31 04:22:07,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,494 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 85 flow. Second operand 3 states and 448 transitions. [2023-08-31 04:22:07,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 239 flow [2023-08-31 04:22:07,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 231 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 04:22:07,500 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 94 flow [2023-08-31 04:22:07,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-31 04:22:07,504 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-31 04:22:07,505 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 94 flow [2023-08-31 04:22:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:07,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:22:07,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:07,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1190865823, now seen corresponding path program 1 times [2023-08-31 04:22:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136749573] [2023-08-31 04:22:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:07,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099014795] [2023-08-31 04:22:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:07,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:07,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:22:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:07,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:22:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:07,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136749573] [2023-08-31 04:22:07,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099014795] [2023-08-31 04:22:07,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099014795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:07,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:07,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:22:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8463535] [2023-08-31 04:22:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:22:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:22:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:22:07,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-08-31 04:22:07,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:07,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-08-31 04:22:07,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:08,054 INFO L130 PetriNetUnfolder]: 768/1353 cut-off events. [2023-08-31 04:22:08,055 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-31 04:22:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 1353 events. 768/1353 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6290 event pairs, 289 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 2118. Up to 631 conditions per place. [2023-08-31 04:22:08,062 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 72 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-08-31 04:22:08,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 85 transitions, 358 flow [2023-08-31 04:22:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:22:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:22:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-08-31 04:22:08,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535361216730038 [2023-08-31 04:22:08,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-08-31 04:22:08,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-08-31 04:22:08,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:08,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-08-31 04:22:08,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 263.0) internal successors, (1578), 6 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,073 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 263.0) internal successors, (1578), 6 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,073 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 94 flow. Second operand 5 states and 704 transitions. [2023-08-31 04:22:08,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 85 transitions, 358 flow [2023-08-31 04:22:08,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 85 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:22:08,076 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 125 flow [2023-08-31 04:22:08,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-31 04:22:08,077 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-31 04:22:08,077 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 125 flow [2023-08-31 04:22:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:08,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:08,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:08,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:08,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash -975244755, now seen corresponding path program 1 times [2023-08-31 04:22:08,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:08,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292665230] [2023-08-31 04:22:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:08,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:08,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292665230] [2023-08-31 04:22:08,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292665230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:08,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:08,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:22:08,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821995307] [2023-08-31 04:22:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:08,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:22:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:22:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:22:08,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 263 [2023-08-31 04:22:08,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:08,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 263 [2023-08-31 04:22:08,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:08,550 INFO L130 PetriNetUnfolder]: 837/1451 cut-off events. [2023-08-31 04:22:08,550 INFO L131 PetriNetUnfolder]: For 491/491 co-relation queries the response was YES. [2023-08-31 04:22:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1451 events. 837/1451 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6266 event pairs, 345 based on Foata normal form. 42/1276 useless extension candidates. Maximal degree in co-relation 2955. Up to 839 conditions per place. [2023-08-31 04:22:08,557 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 53 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-08-31 04:22:08,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 321 flow [2023-08-31 04:22:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:22:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:22:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-31 04:22:08,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665399239543726 [2023-08-31 04:22:08,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-31 04:22:08,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-31 04:22:08,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:08,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-31 04:22:08,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,563 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 125 flow. Second operand 3 states and 447 transitions. [2023-08-31 04:22:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 321 flow [2023-08-31 04:22:08,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 04:22:08,566 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2023-08-31 04:22:08,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-31 04:22:08,567 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-31 04:22:08,567 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2023-08-31 04:22:08,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:08,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:08,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:22:08,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:08,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 462982722, now seen corresponding path program 1 times [2023-08-31 04:22:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:08,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927176739] [2023-08-31 04:22:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:08,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:08,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994325602] [2023-08-31 04:22:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:08,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:08,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:08,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:22:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 04:22:08,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:08,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:08,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:08,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927176739] [2023-08-31 04:22:08,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:08,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994325602] [2023-08-31 04:22:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994325602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:22:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113079662] [2023-08-31 04:22:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:22:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:22:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:22:08,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-31 04:22:08,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:08,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-31 04:22:08,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:08,934 INFO L130 PetriNetUnfolder]: 629/1157 cut-off events. [2023-08-31 04:22:08,934 INFO L131 PetriNetUnfolder]: For 421/421 co-relation queries the response was YES. [2023-08-31 04:22:08,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 1157 events. 629/1157 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4983 event pairs, 467 based on Foata normal form. 64/1036 useless extension candidates. Maximal degree in co-relation 2203. Up to 988 conditions per place. [2023-08-31 04:22:08,940 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 29 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-31 04:22:08,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 177 flow [2023-08-31 04:22:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:22:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:22:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-31 04:22:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532319391634981 [2023-08-31 04:22:08,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-31 04:22:08,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-31 04:22:08,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:08,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-31 04:22:08,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,945 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 3 states and 420 transitions. [2023-08-31 04:22:08,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 177 flow [2023-08-31 04:22:08,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 04:22:08,947 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 110 flow [2023-08-31 04:22:08,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-31 04:22:08,948 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-31 04:22:08,948 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 110 flow [2023-08-31 04:22:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:08,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:08,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:09,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-31 04:22:09,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:09,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2106315209, now seen corresponding path program 1 times [2023-08-31 04:22:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273512195] [2023-08-31 04:22:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:09,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:09,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210940609] [2023-08-31 04:22:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:09,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:09,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:09,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:09,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:22:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:22:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:09,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:22:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:09,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:09,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:09,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273512195] [2023-08-31 04:22:09,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:09,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210940609] [2023-08-31 04:22:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210940609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:09,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:09,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:22:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200056885] [2023-08-31 04:22:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:22:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:22:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:22:09,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-31 04:22:09,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:09,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:09,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-31 04:22:09,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:09,466 INFO L130 PetriNetUnfolder]: 509/940 cut-off events. [2023-08-31 04:22:09,466 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-31 04:22:09,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 940 events. 509/940 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4025 event pairs, 135 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 2067. Up to 552 conditions per place. [2023-08-31 04:22:09,470 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 38 selfloop transitions, 4 changer transitions 2/49 dead transitions. [2023-08-31 04:22:09,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 229 flow [2023-08-31 04:22:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:22:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:22:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-31 04:22:09,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-08-31 04:22:09,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-31 04:22:09,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-31 04:22:09,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:09,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-31 04:22:09,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:09,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:09,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:09,477 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 110 flow. Second operand 3 states and 433 transitions. [2023-08-31 04:22:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 229 flow [2023-08-31 04:22:09,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:22:09,479 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 113 flow [2023-08-31 04:22:09,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-08-31 04:22:09,480 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-31 04:22:09,480 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 113 flow [2023-08-31 04:22:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:09,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:09,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:09,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:09,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:09,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 80410237, now seen corresponding path program 1 times [2023-08-31 04:22:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:09,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331922267] [2023-08-31 04:22:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:09,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062118949] [2023-08-31 04:22:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:09,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:09,704 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) [2023-08-31 04:22:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:22:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:22:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:10,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331922267] [2023-08-31 04:22:10,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062118949] [2023-08-31 04:22:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062118949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:10,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:10,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:22:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071102157] [2023-08-31 04:22:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:22:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:22:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:22:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-08-31 04:22:10,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:10,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:10,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-08-31 04:22:10,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:10,316 INFO L130 PetriNetUnfolder]: 602/1172 cut-off events. [2023-08-31 04:22:10,316 INFO L131 PetriNetUnfolder]: For 176/178 co-relation queries the response was YES. [2023-08-31 04:22:10,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1172 events. 602/1172 cut-off events. For 176/178 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5226 event pairs, 138 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 2665. Up to 529 conditions per place. [2023-08-31 04:22:10,322 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 56 selfloop transitions, 4 changer transitions 5/72 dead transitions. [2023-08-31 04:22:10,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 347 flow [2023-08-31 04:22:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:22:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:22:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-08-31 04:22:10,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361216730038023 [2023-08-31 04:22:10,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-08-31 04:22:10,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-08-31 04:22:10,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:10,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-08-31 04:22:10,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:10,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:10,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:10,328 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 113 flow. Second operand 4 states and 564 transitions. [2023-08-31 04:22:10,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 347 flow [2023-08-31 04:22:10,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:22:10,331 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 134 flow [2023-08-31 04:22:10,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-31 04:22:10,332 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-31 04:22:10,332 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 134 flow [2023-08-31 04:22:10,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:10,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:10,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:10,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:10,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:10,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1189813252, now seen corresponding path program 1 times [2023-08-31 04:22:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:10,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550156369] [2023-08-31 04:22:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:10,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:10,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238506974] [2023-08-31 04:22:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:10,557 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) [2023-08-31 04:22:10,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:22:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:22:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:22:10,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-31 04:22:10,762 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 04:22:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 04:22:10,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 04:22:10,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-31 04:22:10,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-08-31 04:22:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:11,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550156369] [2023-08-31 04:22:11,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238506974] [2023-08-31 04:22:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238506974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:11,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:11,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 04:22:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529930930] [2023-08-31 04:22:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 04:22:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 04:22:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-31 04:22:11,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 263 [2023-08-31 04:22:11,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:11,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:11,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 263 [2023-08-31 04:22:11,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:11,782 INFO L130 PetriNetUnfolder]: 922/1795 cut-off events. [2023-08-31 04:22:11,783 INFO L131 PetriNetUnfolder]: For 372/378 co-relation queries the response was YES. [2023-08-31 04:22:11,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 1795 events. 922/1795 cut-off events. For 372/378 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 9196 event pairs, 288 based on Foata normal form. 12/1731 useless extension candidates. Maximal degree in co-relation 4083. Up to 833 conditions per place. [2023-08-31 04:22:11,793 INFO L137 encePairwiseOnDemand]: 254/263 looper letters, 66 selfloop transitions, 11 changer transitions 8/92 dead transitions. [2023-08-31 04:22:11,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 92 transitions, 462 flow [2023-08-31 04:22:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 04:22:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 04:22:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 910 transitions. [2023-08-31 04:22:11,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49429657794676807 [2023-08-31 04:22:11,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 910 transitions. [2023-08-31 04:22:11,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 910 transitions. [2023-08-31 04:22:11,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:11,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 910 transitions. [2023-08-31 04:22:11,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:11,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:11,825 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:11,825 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 134 flow. Second operand 7 states and 910 transitions. [2023-08-31 04:22:11,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 92 transitions, 462 flow [2023-08-31 04:22:11,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 04:22:11,828 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 217 flow [2023-08-31 04:22:11,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-31 04:22:11,828 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-31 04:22:11,829 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 217 flow [2023-08-31 04:22:11,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:11,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:11,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:11,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:12,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:12,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:12,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 839130447, now seen corresponding path program 1 times [2023-08-31 04:22:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521575756] [2023-08-31 04:22:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:12,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:12,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:12,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440491835] [2023-08-31 04:22:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:12,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:12,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:12,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:22:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 04:22:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:12,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:22:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521575756] [2023-08-31 04:22:12,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440491835] [2023-08-31 04:22:12,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440491835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:22:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:22:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:22:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937750830] [2023-08-31 04:22:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:22:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:22:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:22:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:22:12,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-31 04:22:12,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:12,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:12,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-31 04:22:12,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:12,344 INFO L130 PetriNetUnfolder]: 739/1428 cut-off events. [2023-08-31 04:22:12,344 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-08-31 04:22:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1428 events. 739/1428 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5820 event pairs, 232 based on Foata normal form. 38/1466 useless extension candidates. Maximal degree in co-relation 3563. Up to 837 conditions per place. [2023-08-31 04:22:12,371 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 47 selfloop transitions, 2 changer transitions 6/59 dead transitions. [2023-08-31 04:22:12,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 361 flow [2023-08-31 04:22:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:22:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:22:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-31 04:22:12,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-08-31 04:22:12,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-31 04:22:12,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-31 04:22:12,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:12,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-31 04:22:12,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:12,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:12,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:12,376 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 217 flow. Second operand 3 states and 433 transitions. [2023-08-31 04:22:12,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 361 flow [2023-08-31 04:22:12,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 04:22:12,380 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 196 flow [2023-08-31 04:22:12,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-08-31 04:22:12,380 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-31 04:22:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 196 flow [2023-08-31 04:22:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:12,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:12,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:12,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:12,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:12,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:12,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1317669106, now seen corresponding path program 1 times [2023-08-31 04:22:12,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:12,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052844637] [2023-08-31 04:22:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:12,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:12,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:12,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970030722] [2023-08-31 04:22:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:12,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:12,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:22:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 04:22:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:13,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:13,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:13,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052844637] [2023-08-31 04:22:13,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:22:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970030722] [2023-08-31 04:22:13,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970030722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:22:13,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 04:22:13,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-31 04:22:13,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998609657] [2023-08-31 04:22:13,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 04:22:13,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:22:13,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:22:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:22:14,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-31 04:22:14,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 196 flow. Second operand has 12 states, 12 states have (on average 125.58333333333333) internal successors, (1507), 12 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:14,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:14,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-31 04:22:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:17,232 INFO L130 PetriNetUnfolder]: 650/1323 cut-off events. [2023-08-31 04:22:17,232 INFO L131 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2023-08-31 04:22:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1323 events. 650/1323 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4542 event pairs, 118 based on Foata normal form. 20/1343 useless extension candidates. Maximal degree in co-relation 3403. Up to 269 conditions per place. [2023-08-31 04:22:17,239 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 104 selfloop transitions, 11 changer transitions 7/128 dead transitions. [2023-08-31 04:22:17,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 128 transitions, 752 flow [2023-08-31 04:22:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 04:22:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 04:22:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1323 transitions. [2023-08-31 04:22:17,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503041825095057 [2023-08-31 04:22:17,245 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1323 transitions. [2023-08-31 04:22:17,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1323 transitions. [2023-08-31 04:22:17,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:17,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1323 transitions. [2023-08-31 04:22:17,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,252 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 263.0) internal successors, (2893), 11 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,252 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 196 flow. Second operand 10 states and 1323 transitions. [2023-08-31 04:22:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 128 transitions, 752 flow [2023-08-31 04:22:17,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 128 transitions, 732 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 04:22:17,258 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 247 flow [2023-08-31 04:22:17,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=247, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-31 04:22:17,258 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-31 04:22:17,260 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 247 flow [2023-08-31 04:22:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 125.58333333333333) internal successors, (1507), 12 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:17,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:17,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:17,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:17,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-31 04:22:17,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 100212339, now seen corresponding path program 1 times [2023-08-31 04:22:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:17,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960589171] [2023-08-31 04:22:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:17,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-31 04:22:17,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253292184] [2023-08-31 04:22:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:17,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:17,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:17,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:22:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:17,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-31 04:22:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:22:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-31 04:22:18,032 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 04:22:18,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 04:22:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 04:22:18,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-31 04:22:18,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-08-31 04:22:18,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-31 04:22:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:18,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:47,673 WARN L222 SmtUtils]: Spent 18.83s on a formula simplification. DAG size of input: 123 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:23:05,957 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~buffer_size~0 4294967296))) (let ((.cse1 (mod c_~next~0 4294967296)) (.cse10 (mod (+ c_~first~0 1) 4294967296)) (.cse8 (mod (mod (mod (+ c_~next~0 1) 4294967296) .cse0) 4294967296))) (or (<= .cse0 .cse1) (= (mod c_~send~0 256) 0) (let ((.cse6 (<= .cse10 2147483647)) (.cse7 (+ |c_~#buffer~0.offset| .cse10 (- 4294967296))) (.cse2 (+ .cse1 |c_~#buffer~0.offset|)) (.cse4 (+ |c_~#buffer~0.offset| .cse10)) (.cse5 (< 2147483647 .cse10))) (and (or (let ((.cse3 (+ |c_~#buffer~0.offset| .cse8))) (and (or (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse3 1) .cse4) 1)) .cse5) (or .cse6 (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse3 1) .cse7) 1))))) (< 2147483647 .cse8)) (or (<= .cse8 2147483647) (let ((.cse9 (+ |c_~#buffer~0.offset| .cse8 (- 4294967296)))) (and (or .cse6 (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) (+ .cse1 |c_~#buffer~0.offset| (- 4294967296)) v_ArrVal_630) .cse9 1) .cse7) 1))) (or (forall ((v_ArrVal_630 Int) (v_ArrVal_628 (Array Int Int))) (= 1 (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_628) |c_~#buffer~0.base|) .cse2 v_ArrVal_630) .cse9 1) .cse4))) .cse5)))))) (<= .cse0 .cse10) (<= .cse8 0)))) is different from false [2023-08-31 04:23:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:23:06,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:23:06,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960589171] [2023-08-31 04:23:06,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-31 04:23:06,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253292184] [2023-08-31 04:23:06,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253292184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:23:06,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 04:23:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2023-08-31 04:23:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063937425] [2023-08-31 04:23:06,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 04:23:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 04:23:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:23:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 04:23:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=697, Unknown=1, NotChecked=54, Total=870 [2023-08-31 04:23:07,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 263 [2023-08-31 04:23:07,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 247 flow. Second operand has 30 states, 30 states have (on average 75.13333333333334) internal successors, (2254), 30 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:07,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:23:07,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 263 [2023-08-31 04:23:07,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:23:29,830 WARN L222 SmtUtils]: Spent 19.37s on a formula simplification. DAG size of input: 204 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:23:52,095 WARN L222 SmtUtils]: Spent 12.57s on a formula simplification. DAG size of input: 162 DAG size of output: 141 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:24:18,687 WARN L222 SmtUtils]: Spent 25.24s on a formula simplification. DAG size of input: 231 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:24:44,080 WARN L222 SmtUtils]: Spent 24.31s on a formula simplification. DAG size of input: 219 DAG size of output: 122 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:25:12,133 WARN L222 SmtUtils]: Spent 26.62s on a formula simplification. DAG size of input: 250 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:26:03,677 WARN L222 SmtUtils]: Spent 48.30s on a formula simplification. DAG size of input: 280 DAG size of output: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:26:10,422 WARN L222 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:26:28,385 WARN L222 SmtUtils]: Spent 14.55s on a formula simplification. DAG size of input: 116 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:26:55,087 WARN L222 SmtUtils]: Spent 15.65s on a formula simplification. DAG size of input: 113 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:27:43,056 WARN L222 SmtUtils]: Spent 45.24s on a formula simplification. DAG size of input: 278 DAG size of output: 237 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:28:20,006 WARN L222 SmtUtils]: Spent 16.99s on a formula simplification. DAG size of input: 208 DAG size of output: 187 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:29:01,222 WARN L222 SmtUtils]: Spent 37.03s on a formula simplification. DAG size of input: 276 DAG size of output: 183 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:29:32,515 WARN L222 SmtUtils]: Spent 18.81s on a formula simplification. DAG size of input: 189 DAG size of output: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:30:27,138 WARN L222 SmtUtils]: Spent 51.96s on a formula simplification. DAG size of input: 212 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:30:47,953 WARN L222 SmtUtils]: Spent 16.86s on a formula simplification. DAG size of input: 177 DAG size of output: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:31:40,803 WARN L222 SmtUtils]: Spent 49.55s on a formula simplification. DAG size of input: 209 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:32:01,534 WARN L222 SmtUtils]: Spent 8.91s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:32:37,784 WARN L222 SmtUtils]: Spent 34.51s on a formula simplification. DAG size of input: 181 DAG size of output: 123 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:33:14,440 WARN L222 SmtUtils]: Spent 27.92s on a formula simplification. DAG size of input: 140 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:33:42,119 WARN L222 SmtUtils]: Spent 22.58s on a formula simplification. DAG size of input: 128 DAG size of output: 126 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:34:34,331 WARN L222 SmtUtils]: Spent 49.62s on a formula simplification. DAG size of input: 210 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:35:08,015 WARN L222 SmtUtils]: Spent 32.36s on a formula simplification. DAG size of input: 182 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:35:35,208 WARN L222 SmtUtils]: Spent 22.64s on a formula simplification. DAG size of input: 234 DAG size of output: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:36:00,528 WARN L222 SmtUtils]: Spent 23.29s on a formula simplification. DAG size of input: 134 DAG size of output: 132 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15