./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 AFTER --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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:04:34,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:04:34,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:04:34,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:04:34,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:04:34,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:04:34,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:04:34,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:04:34,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:04:34,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:04:34,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:04:34,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:04:34,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:04:34,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:04:34,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:04:34,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:04:34,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:04:34,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:04:34,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:04:34,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:04:34,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:04:34,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:04:34,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:04:34,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:04:34,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:04:34,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:04:34,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:04:34,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:04:34,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:04:34,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:04:34,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:04:34,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:04:34,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:04:34,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:04:34,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:04:34,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:04:34,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:04:34,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:04:34,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:04:34,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:04:34,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:04:34,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:04:34,913 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:04:34,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:04:34,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:04:34,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:04:34,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:04:34,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:04:34,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:04:34,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:04:34,917 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:04:34,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:04:34,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:04:34,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:04:34,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:04:34,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:04:34,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:04:34,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:04:34,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:04:34,919 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:04:34,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:04:34,919 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:04:34,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:04:34,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:04:34,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:04:34,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:04:34,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:04:34,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:04:34,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:04:34,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:04:34,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:04:34,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:04:34,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:04:34,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:04:34,922 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:04:34,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:04:34,922 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:04:34,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 22:04:35,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:04:35,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:04:35,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:04:35,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:04:35,273 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:04:35,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 22:04:36,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:04:36,719 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:04:36,724 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 22:04:36,743 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21eb3bb02/2e2fbbed528f4c9f9dc54ef350b929ff/FLAG308f94231 [2023-08-30 22:04:36,755 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21eb3bb02/2e2fbbed528f4c9f9dc54ef350b929ff [2023-08-30 22:04:36,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:04:36,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:04:36,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:04:36,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:04:36,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:04:36,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:36" (1/1) ... [2023-08-30 22:04:36,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b66ad94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:36, skipping insertion in model container [2023-08-30 22:04:36,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:36" (1/1) ... [2023-08-30 22:04:36,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:04:36,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:04:37,071 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] [2023-08-30 22:04:37,079 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] [2023-08-30 22:04:37,085 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] [2023-08-30 22:04:37,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:04:37,105 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:04:37,136 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] [2023-08-30 22:04:37,138 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] [2023-08-30 22:04:37,140 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] [2023-08-30 22:04:37,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:04:37,173 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:04:37,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37 WrapperNode [2023-08-30 22:04:37,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:04:37,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:04:37,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:04:37,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:04:37,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,212 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-08-30 22:04:37,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:04:37,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:04:37,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:04:37,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:04:37,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,234 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:04:37,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:04:37,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:04:37,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:04:37,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (1/1) ... [2023-08-30 22:04:37,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:04:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:37,282 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) [2023-08-30 22:04:37,291 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 [2023-08-30 22:04:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:04:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:04:37,315 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:04:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:04:37,315 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 22:04:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:04:37,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:04:37,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:04:37,318 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:04:37,494 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:04:37,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:04:37,808 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:04:37,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:04:37,817 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:04:37,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:37 BoogieIcfgContainer [2023-08-30 22:04:37,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:04:37,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:04:37,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:04:37,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:04:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:04:36" (1/3) ... [2023-08-30 22:04:37,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fceb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:37, skipping insertion in model container [2023-08-30 22:04:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:37" (2/3) ... [2023-08-30 22:04:37,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fceb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:37, skipping insertion in model container [2023-08-30 22:04:37,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:37" (3/3) ... [2023-08-30 22:04:37,827 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-08-30 22:04:37,834 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:04:37,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:04:37,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-30 22:04:37,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:04:37,945 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:04:37,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 312 flow [2023-08-30 22:04:38,061 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-08-30 22:04:38,062 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:04:38,067 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. [2023-08-30 22:04:38,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 148 transitions, 312 flow [2023-08-30 22:04:38,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 137 transitions, 283 flow [2023-08-30 22:04:38,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:04:38,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions, 283 flow [2023-08-30 22:04:38,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 137 transitions, 283 flow [2023-08-30 22:04:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 283 flow [2023-08-30 22:04:38,144 INFO L130 PetriNetUnfolder]: 11/137 cut-off events. [2023-08-30 22:04:38,144 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:04:38,145 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. [2023-08-30 22:04:38,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 4498 [2023-08-30 22:04:42,755 INFO L134 LiptonReduction]: Checked pairs total: 9988 [2023-08-30 22:04:42,755 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 22:04:42,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:04:42,772 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;@5c25e065, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:04:42,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 22:04:42,776 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-08-30 22:04:42,777 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:04:42,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:42,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 22:04:42,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:42,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -249038413, now seen corresponding path program 1 times [2023-08-30 22:04:42,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:42,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704298297] [2023-08-30 22:04:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:43,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:43,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704298297] [2023-08-30 22:04:43,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704298297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:43,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:43,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315880148] [2023-08-30 22:04:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:43,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:43,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-30 22:04:43,274 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) [2023-08-30 22:04:43,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:43,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-30 22:04:43,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:43,446 INFO L130 PetriNetUnfolder]: 691/1209 cut-off events. [2023-08-30 22:04:43,446 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 22:04:43,449 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. [2023-08-30 22:04:43,454 INFO L137 encePairwiseOnDemand]: 257/263 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 22:04:43,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 239 flow [2023-08-30 22:04:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-30 22:04:43,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678073510773131 [2023-08-30 22:04:43,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-30 22:04:43,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-30 22:04:43,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:43,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-30 22:04:43,475 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) [2023-08-30 22:04:43,479 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) [2023-08-30 22:04:43,480 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) [2023-08-30 22:04:43,481 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 85 flow. Second operand 3 states and 448 transitions. [2023-08-30 22:04:43,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 239 flow [2023-08-30 22:04:43,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 231 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:04:43,486 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 94 flow [2023-08-30 22:04:43,488 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} [2023-08-30 22:04:43,491 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-30 22:04:43,491 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 94 flow [2023-08-30 22:04:43,492 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) [2023-08-30 22:04:43,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:43,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:43,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:04:43,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:43,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1190865823, now seen corresponding path program 1 times [2023-08-30 22:04:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:43,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27021981] [2023-08-30 22:04:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:43,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:43,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938196350] [2023-08-30 22:04:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:43,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:43,527 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) [2023-08-30 22:04:43,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:04:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 22:04:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:43,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:43,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27021981] [2023-08-30 22:04:43,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938196350] [2023-08-30 22:04:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938196350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:43,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:43,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:04:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51970371] [2023-08-30 22:04:43,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:43,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:04:43,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:04:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:04:43,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-08-30 22:04:43,737 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) [2023-08-30 22:04:43,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:43,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-08-30 22:04:43,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:44,019 INFO L130 PetriNetUnfolder]: 768/1353 cut-off events. [2023-08-30 22:04:44,019 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 22:04:44,021 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. [2023-08-30 22:04:44,025 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 72 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-08-30 22:04:44,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 85 transitions, 358 flow [2023-08-30 22:04:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 22:04:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 22:04:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-08-30 22:04:44,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535361216730038 [2023-08-30 22:04:44,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-08-30 22:04:44,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-08-30 22:04:44,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:44,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-08-30 22:04:44,037 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) [2023-08-30 22:04:44,040 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) [2023-08-30 22:04:44,041 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) [2023-08-30 22:04:44,041 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 94 flow. Second operand 5 states and 704 transitions. [2023-08-30 22:04:44,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 85 transitions, 358 flow [2023-08-30 22:04:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 85 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:44,045 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 125 flow [2023-08-30 22:04:44,045 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} [2023-08-30 22:04:44,046 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-30 22:04:44,046 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 125 flow [2023-08-30 22:04:44,046 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) [2023-08-30 22:04:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:44,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:44,252 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 [2023-08-30 22:04:44,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:44,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash -975244755, now seen corresponding path program 1 times [2023-08-30 22:04:44,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:44,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953605968] [2023-08-30 22:04:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:44,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953605968] [2023-08-30 22:04:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953605968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:44,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:44,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:44,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893599798] [2023-08-30 22:04:44,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:44,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:44,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 263 [2023-08-30 22:04:44,342 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) [2023-08-30 22:04:44,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:44,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 263 [2023-08-30 22:04:44,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:44,506 INFO L130 PetriNetUnfolder]: 837/1451 cut-off events. [2023-08-30 22:04:44,506 INFO L131 PetriNetUnfolder]: For 491/491 co-relation queries the response was YES. [2023-08-30 22:04:44,509 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. [2023-08-30 22:04:44,514 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 53 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-08-30 22:04:44,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 321 flow [2023-08-30 22:04:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-30 22:04:44,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665399239543726 [2023-08-30 22:04:44,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-30 22:04:44,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-30 22:04:44,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:44,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-30 22:04:44,518 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) [2023-08-30 22:04:44,520 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) [2023-08-30 22:04:44,520 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) [2023-08-30 22:04:44,520 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 125 flow. Second operand 3 states and 447 transitions. [2023-08-30 22:04:44,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 321 flow [2023-08-30 22:04:44,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:44,527 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2023-08-30 22:04:44,527 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} [2023-08-30 22:04:44,529 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-30 22:04:44,529 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2023-08-30 22:04:44,529 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) [2023-08-30 22:04:44,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:44,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:44,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:04:44,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:44,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:44,531 INFO L85 PathProgramCache]: Analyzing trace with hash 462982722, now seen corresponding path program 1 times [2023-08-30 22:04:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615544257] [2023-08-30 22:04:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:44,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:44,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480295663] [2023-08-30 22:04:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:44,570 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) [2023-08-30 22:04:44,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 22:04:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 22:04:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:44,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:44,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615544257] [2023-08-30 22:04:44,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480295663] [2023-08-30 22:04:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480295663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:44,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:04:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491275010] [2023-08-30 22:04:44,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:44,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:04:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:04:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:04:44,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-30 22:04:44,767 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) [2023-08-30 22:04:44,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:44,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-30 22:04:44,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:44,886 INFO L130 PetriNetUnfolder]: 629/1157 cut-off events. [2023-08-30 22:04:44,886 INFO L131 PetriNetUnfolder]: For 421/421 co-relation queries the response was YES. [2023-08-30 22:04:44,888 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. [2023-08-30 22:04:44,892 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 29 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 22:04:44,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 177 flow [2023-08-30 22:04:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-30 22:04:44,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532319391634981 [2023-08-30 22:04:44,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-30 22:04:44,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-30 22:04:44,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:44,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-30 22:04:44,895 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) [2023-08-30 22:04:44,897 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) [2023-08-30 22:04:44,897 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) [2023-08-30 22:04:44,898 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 3 states and 420 transitions. [2023-08-30 22:04:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 177 flow [2023-08-30 22:04:44,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:04:44,900 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 110 flow [2023-08-30 22:04:44,900 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} [2023-08-30 22:04:44,901 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-30 22:04:44,901 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 110 flow [2023-08-30 22:04:44,901 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) [2023-08-30 22:04:44,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:44,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:44,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:45,107 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 [2023-08-30 22:04:45,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:45,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2106315209, now seen corresponding path program 1 times [2023-08-30 22:04:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:45,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773331093] [2023-08-30 22:04:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:45,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:45,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711066812] [2023-08-30 22:04:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:45,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:45,137 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) [2023-08-30 22:04:45,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 22:04:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 22:04:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:45,274 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 [2023-08-30 22:04:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:45,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:45,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:45,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773331093] [2023-08-30 22:04:45,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711066812] [2023-08-30 22:04:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711066812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:45,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:45,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506752642] [2023-08-30 22:04:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:45,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-30 22:04:45,314 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) [2023-08-30 22:04:45,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:45,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-30 22:04:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:45,428 INFO L130 PetriNetUnfolder]: 509/940 cut-off events. [2023-08-30 22:04:45,429 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-30 22:04:45,430 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. [2023-08-30 22:04:45,433 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 38 selfloop transitions, 4 changer transitions 2/49 dead transitions. [2023-08-30 22:04:45,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 229 flow [2023-08-30 22:04:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-30 22:04:45,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-08-30 22:04:45,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-30 22:04:45,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-30 22:04:45,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:45,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-30 22:04:45,437 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) [2023-08-30 22:04:45,438 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) [2023-08-30 22:04:45,439 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) [2023-08-30 22:04:45,439 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 110 flow. Second operand 3 states and 433 transitions. [2023-08-30 22:04:45,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 229 flow [2023-08-30 22:04:45,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:45,441 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 113 flow [2023-08-30 22:04:45,441 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} [2023-08-30 22:04:45,443 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 22:04:45,444 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 113 flow [2023-08-30 22:04:45,444 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) [2023-08-30 22:04:45,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:45,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:45,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 22:04:45,650 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 [2023-08-30 22:04:45,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:45,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash 80410237, now seen corresponding path program 1 times [2023-08-30 22:04:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774921968] [2023-08-30 22:04:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:45,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:45,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029634739] [2023-08-30 22:04:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:45,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:45,676 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) [2023-08-30 22:04:45,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 22:04:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:04:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:46,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:46,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774921968] [2023-08-30 22:04:46,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029634739] [2023-08-30 22:04:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029634739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:46,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836388110] [2023-08-30 22:04:46,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:46,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:04:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:46,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:04:46,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:04:46,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 263 [2023-08-30 22:04:46,110 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) [2023-08-30 22:04:46,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:46,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 263 [2023-08-30 22:04:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:46,258 INFO L130 PetriNetUnfolder]: 602/1172 cut-off events. [2023-08-30 22:04:46,258 INFO L131 PetriNetUnfolder]: For 176/178 co-relation queries the response was YES. [2023-08-30 22:04:46,260 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. [2023-08-30 22:04:46,264 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 56 selfloop transitions, 4 changer transitions 5/72 dead transitions. [2023-08-30 22:04:46,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 347 flow [2023-08-30 22:04:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 22:04:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 22:04:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-08-30 22:04:46,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361216730038023 [2023-08-30 22:04:46,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-08-30 22:04:46,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-08-30 22:04:46,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:46,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-08-30 22:04:46,268 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) [2023-08-30 22:04:46,269 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) [2023-08-30 22:04:46,270 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) [2023-08-30 22:04:46,270 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 113 flow. Second operand 4 states and 564 transitions. [2023-08-30 22:04:46,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 347 flow [2023-08-30 22:04:46,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:46,272 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 134 flow [2023-08-30 22:04:46,273 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} [2023-08-30 22:04:46,273 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-30 22:04:46,273 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 134 flow [2023-08-30 22:04:46,274 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) [2023-08-30 22:04:46,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:46,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:46,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:46,480 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 [2023-08-30 22:04:46,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:46,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1189813252, now seen corresponding path program 1 times [2023-08-30 22:04:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:46,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085561050] [2023-08-30 22:04:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:46,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:46,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813466877] [2023-08-30 22:04:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:46,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:46,501 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) [2023-08-30 22:04:46,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 22:04:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 22:04:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:04:46,733 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 [2023-08-30 22:04:46,748 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 22:04:46,749 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 [2023-08-30 22:04:46,791 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 [2023-08-30 22:04:46,857 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 [2023-08-30 22:04:46,965 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 [2023-08-30 22:04:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:47,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:47,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085561050] [2023-08-30 22:04:47,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813466877] [2023-08-30 22:04:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813466877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:47,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:47,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 22:04:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144062400] [2023-08-30 22:04:47,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:47,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 22:04:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 22:04:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 22:04:47,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 263 [2023-08-30 22:04:47,347 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) [2023-08-30 22:04:47,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:47,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 263 [2023-08-30 22:04:47,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:47,683 INFO L130 PetriNetUnfolder]: 922/1795 cut-off events. [2023-08-30 22:04:47,683 INFO L131 PetriNetUnfolder]: For 372/378 co-relation queries the response was YES. [2023-08-30 22:04:47,686 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. [2023-08-30 22:04:47,691 INFO L137 encePairwiseOnDemand]: 254/263 looper letters, 66 selfloop transitions, 11 changer transitions 8/92 dead transitions. [2023-08-30 22:04:47,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 92 transitions, 462 flow [2023-08-30 22:04:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 22:04:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 22:04:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 910 transitions. [2023-08-30 22:04:47,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49429657794676807 [2023-08-30 22:04:47,694 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 910 transitions. [2023-08-30 22:04:47,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 910 transitions. [2023-08-30 22:04:47,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:47,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 910 transitions. [2023-08-30 22:04:47,697 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) [2023-08-30 22:04:47,699 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) [2023-08-30 22:04:47,699 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) [2023-08-30 22:04:47,700 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 134 flow. Second operand 7 states and 910 transitions. [2023-08-30 22:04:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 92 transitions, 462 flow [2023-08-30 22:04:47,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:47,703 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 217 flow [2023-08-30 22:04:47,703 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} [2023-08-30 22:04:47,704 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-30 22:04:47,704 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 217 flow [2023-08-30 22:04:47,705 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) [2023-08-30 22:04:47,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:47,705 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] [2023-08-30 22:04:47,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:47,912 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 [2023-08-30 22:04:47,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:47,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 839130447, now seen corresponding path program 1 times [2023-08-30 22:04:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941799197] [2023-08-30 22:04:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:47,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964246552] [2023-08-30 22:04:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:47,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:47,937 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) [2023-08-30 22:04:47,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 22:04:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 22:04:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:48,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:48,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:48,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941799197] [2023-08-30 22:04:48,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964246552] [2023-08-30 22:04:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964246552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:48,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544663499] [2023-08-30 22:04:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 263 [2023-08-30 22:04:48,077 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) [2023-08-30 22:04:48,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:48,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 263 [2023-08-30 22:04:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:48,233 INFO L130 PetriNetUnfolder]: 739/1428 cut-off events. [2023-08-30 22:04:48,234 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-08-30 22:04:48,237 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. [2023-08-30 22:04:48,240 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 47 selfloop transitions, 2 changer transitions 6/59 dead transitions. [2023-08-30 22:04:48,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 361 flow [2023-08-30 22:04:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-30 22:04:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487959442332065 [2023-08-30 22:04:48,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-30 22:04:48,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-30 22:04:48,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:48,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-30 22:04:48,244 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) [2023-08-30 22:04:48,245 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) [2023-08-30 22:04:48,245 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) [2023-08-30 22:04:48,245 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 217 flow. Second operand 3 states and 433 transitions. [2023-08-30 22:04:48,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 361 flow [2023-08-30 22:04:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:48,249 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 196 flow [2023-08-30 22:04:48,249 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} [2023-08-30 22:04:48,250 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-30 22:04:48,250 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 196 flow [2023-08-30 22:04:48,250 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) [2023-08-30 22:04:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:48,250 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] [2023-08-30 22:04:48,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 22:04:48,456 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 [2023-08-30 22:04:48,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:48,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1317669106, now seen corresponding path program 1 times [2023-08-30 22:04:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466634558] [2023-08-30 22:04:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:48,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:48,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233652289] [2023-08-30 22:04:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:48,476 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) [2023-08-30 22:04:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 22:04:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 22:04:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:49,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:49,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:49,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466634558] [2023-08-30 22:04:49,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:49,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233652289] [2023-08-30 22:04:49,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233652289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:04:49,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 22:04:49,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 22:04:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143187971] [2023-08-30 22:04:49,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 22:04:49,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 22:04:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 22:04:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 22:04:50,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-30 22:04:50,158 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) [2023-08-30 22:04:50,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:50,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-30 22:04:50,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:53,017 INFO L130 PetriNetUnfolder]: 650/1323 cut-off events. [2023-08-30 22:04:53,017 INFO L131 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2023-08-30 22:04:53,021 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. [2023-08-30 22:04:53,025 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 104 selfloop transitions, 11 changer transitions 7/128 dead transitions. [2023-08-30 22:04:53,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 128 transitions, 752 flow [2023-08-30 22:04:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 22:04:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 22:04:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1323 transitions. [2023-08-30 22:04:53,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503041825095057 [2023-08-30 22:04:53,034 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1323 transitions. [2023-08-30 22:04:53,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1323 transitions. [2023-08-30 22:04:53,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:53,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1323 transitions. [2023-08-30 22:04:53,037 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) [2023-08-30 22:04:53,040 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) [2023-08-30 22:04:53,041 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) [2023-08-30 22:04:53,041 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 196 flow. Second operand 10 states and 1323 transitions. [2023-08-30 22:04:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 128 transitions, 752 flow [2023-08-30 22:04:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 128 transitions, 732 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:53,045 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 247 flow [2023-08-30 22:04:53,046 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} [2023-08-30 22:04:53,046 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-30 22:04:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 247 flow [2023-08-30 22:04:53,047 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) [2023-08-30 22:04:53,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:53,047 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] [2023-08-30 22:04:53,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:53,254 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 [2023-08-30 22:04:53,254 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 22:04:53,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash 100212339, now seen corresponding path program 1 times [2023-08-30 22:04:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553087223] [2023-08-30 22:04:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:53,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:53,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216645554] [2023-08-30 22:04:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:53,273 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) [2023-08-30 22:04:53,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 22:04:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 22:04:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:04:53,747 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 [2023-08-30 22:04:53,764 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 22:04:53,766 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 [2023-08-30 22:04:53,822 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 [2023-08-30 22:04:53,968 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 [2023-08-30 22:04:54,323 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 [2023-08-30 22:04:54,514 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 [2023-08-30 22:04:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:54,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:05:23,613 WARN L222 SmtUtils]: Spent 18.71s 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) [2023-08-30 22:05:41,981 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 [2023-08-30 22:05:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:05:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:05:42,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553087223] [2023-08-30 22:05:42,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:05:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216645554] [2023-08-30 22:05:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216645554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:05:42,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 22:05:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2023-08-30 22:05:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859637162] [2023-08-30 22:05:42,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 22:05:42,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 22:05:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:05:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 22:05:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=697, Unknown=1, NotChecked=54, Total=870 [2023-08-30 22:05:43,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 263 [2023-08-30 22:05:43,159 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) [2023-08-30 22:05:43,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:05:43,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 263 [2023-08-30 22:05:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:06:06,099 WARN L222 SmtUtils]: Spent 19.48s 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) [2023-08-30 22:06:28,337 WARN L222 SmtUtils]: Spent 12.62s 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) [2023-08-30 22:06:54,904 WARN L222 SmtUtils]: Spent 25.19s 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) [2023-08-30 22:07:20,180 WARN L222 SmtUtils]: Spent 24.20s 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) [2023-08-30 22:07:47,966 WARN L222 SmtUtils]: Spent 26.36s 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) [2023-08-30 22:08:38,915 WARN L222 SmtUtils]: Spent 47.75s 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) [2023-08-30 22:08:45,587 WARN L222 SmtUtils]: Spent 5.29s 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) [2023-08-30 22:09:03,344 WARN L222 SmtUtils]: Spent 14.34s 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) [2023-08-30 22:09:29,411 WARN L222 SmtUtils]: Spent 15.30s 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) [2023-08-30 22:10:16,441 WARN L222 SmtUtils]: Spent 44.36s 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) [2023-08-30 22:10:52,736 WARN L222 SmtUtils]: Spent 16.66s 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) [2023-08-30 22:11:33,156 WARN L222 SmtUtils]: Spent 36.24s 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) [2023-08-30 22:12:03,860 WARN L222 SmtUtils]: Spent 18.49s 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) [2023-08-30 22:12:57,665 WARN L222 SmtUtils]: Spent 51.19s 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) [2023-08-30 22:13:18,328 WARN L222 SmtUtils]: Spent 16.74s 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) [2023-08-30 22:14:10,742 WARN L222 SmtUtils]: Spent 49.10s 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) [2023-08-30 22:14:31,288 WARN L222 SmtUtils]: Spent 8.83s 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) [2023-08-30 22:15:06,902 WARN L222 SmtUtils]: Spent 33.88s 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) [2023-08-30 22:15:39,839 WARN L222 SmtUtils]: Spent 23.23s 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) [2023-08-30 22:16:06,857 WARN L222 SmtUtils]: Spent 21.17s 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) [2023-08-30 22:17:07,365 WARN L222 SmtUtils]: Spent 58.88s 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) [2023-08-30 22:17:36,804 WARN L222 SmtUtils]: Spent 27.95s 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) [2023-08-30 22:18:12,284 WARN L222 SmtUtils]: Spent 31.00s 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) [2023-08-30 22:18:35,499 WARN L222 SmtUtils]: Spent 21.04s 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