./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.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/goblint-regression/28-race_reach_90-arrayloop2_racing.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 f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --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 18:15:42,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:15:42,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:15:42,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:15:42,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:15:42,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:15:42,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:15:42,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:15:42,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:15:42,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:15:42,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:15:42,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:15:42,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:15:42,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:15:42,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:15:42,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:15:42,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:15:42,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:15:42,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:15:42,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:15:42,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:15:42,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:15:42,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:15:42,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:15:42,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:15:42,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:15:42,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:15:42,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:15:42,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:15:42,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:15:42,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:15:42,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:15:42,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:15:42,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:15:42,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:15:42,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:15:42,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:15:42,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:15:42,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:15:42,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:15:42,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:15:42,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:15:42,934 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:15:42,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:15:42,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:15:42,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:15:42,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:15:42,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:15:42,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:15:42,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:15:42,938 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:15:42,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:15:42,939 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:15:42,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:15:42,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:15:42,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:15:42,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:15:42,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:15:42,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:15:42,940 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:15:42,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:15:42,941 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:15:42,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:15:42,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:15:42,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:15:42,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:15:42,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:42,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:15:42,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:15:42,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:15:42,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:15:42,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:15:42,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:15:42,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:15:42,943 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:15:42,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:15:42,944 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:15:42,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:15:43,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:15:43,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:15:43,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:15:43,282 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:15:43,282 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:15:43,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-08-30 18:15:44,396 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:15:44,643 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:15:44,644 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-08-30 18:15:44,674 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515ee752e/27631f50fe48482687f04812d3a72dfa/FLAG788f17eda [2023-08-30 18:15:44,687 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515ee752e/27631f50fe48482687f04812d3a72dfa [2023-08-30 18:15:44,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:15:44,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:15:44,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:44,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:15:44,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:15:44,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:44" (1/1) ... [2023-08-30 18:15:44,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350bb988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:44, skipping insertion in model container [2023-08-30 18:15:44,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:44" (1/1) ... [2023-08-30 18:15:44,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:15:44,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:15:45,203 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2023-08-30 18:15:45,218 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,219 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,220 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,221 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:45,281 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:15:45,321 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2023-08-30 18:15:45,324 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,324 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,325 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,326 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:45,407 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:15:45,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45 WrapperNode [2023-08-30 18:15:45,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:45,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:45,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:15:45,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:15:45,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,489 INFO L138 Inliner]: procedures = 278, calls = 64, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 304 [2023-08-30 18:15:45,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:45,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:15:45,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:15:45,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:15:45,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:15:45,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:15:45,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:15:45,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:15:45,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:45,586 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 18:15:45,607 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 18:15:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:15:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:15:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 18:15:45,633 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 18:15:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:15:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:15:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 18:15:45,633 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 18:15:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:15:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:15:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:15:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:15:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:15:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:15:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:15:45,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:15:45,636 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 18:15:45,826 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:15:45,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:15:46,231 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:15:46,239 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:15:46,239 INFO L302 CfgBuilder]: Removed 30 assume(true) statements. [2023-08-30 18:15:46,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:46 BoogieIcfgContainer [2023-08-30 18:15:46,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:15:46,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:15:46,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:15:46,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:15:46,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:15:44" (1/3) ... [2023-08-30 18:15:46,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101454ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:46, skipping insertion in model container [2023-08-30 18:15:46,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (2/3) ... [2023-08-30 18:15:46,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101454ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:46, skipping insertion in model container [2023-08-30 18:15:46,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:46" (3/3) ... [2023-08-30 18:15:46,248 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2023-08-30 18:15:46,256 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:15:46,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:15:46,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 18:15:46,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:15:46,361 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:15:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,557 INFO L130 PetriNetUnfolder]: 77/493 cut-off events. [2023-08-30 18:15:46,557 INFO L131 PetriNetUnfolder]: For 8/14 co-relation queries the response was YES. [2023-08-30 18:15:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 493 events. 77/493 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2235 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-30 18:15:46,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:15:46,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 302 transitions, 626 flow [2023-08-30 18:15:46,692 INFO L130 PetriNetUnfolder]: 77/493 cut-off events. [2023-08-30 18:15:46,693 INFO L131 PetriNetUnfolder]: For 8/14 co-relation queries the response was YES. [2023-08-30 18:15:46,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 493 events. 77/493 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2235 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-30 18:15:46,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 31320 [2023-08-30 18:16:02,207 WARN L222 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:09,107 WARN L222 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:14,562 WARN L222 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:19,719 WARN L222 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:19,724 INFO L134 LiptonReduction]: Checked pairs total: 50902 [2023-08-30 18:16:19,724 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-30 18:16:19,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:16:19,752 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;@657d8ad2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:16:19,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:16:19,762 INFO L130 PetriNetUnfolder]: 15/76 cut-off events. [2023-08-30 18:16:19,762 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:16:19,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:19,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:19,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:19,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1212576408, now seen corresponding path program 1 times [2023-08-30 18:16:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825670654] [2023-08-30 18:16:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:20,104 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 18:16:20,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:20,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825670654] [2023-08-30 18:16:20,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825670654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:16:20,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:16:20,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:16:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759660230] [2023-08-30 18:16:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:16:20,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:16:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:16:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:16:20,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-30 18:16:20,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 18:16:20,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:20,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-30 18:16:20,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:21,340 INFO L130 PetriNetUnfolder]: 5341/8583 cut-off events. [2023-08-30 18:16:21,341 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 18:16:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16472 conditions, 8583 events. 5341/8583 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 51439 event pairs, 4400 based on Foata normal form. 1159/7780 useless extension candidates. Maximal degree in co-relation 15575. Up to 7762 conditions per place. [2023-08-30 18:16:21,404 INFO L137 encePairwiseOnDemand]: 535/558 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-30 18:16:21,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 298 flow [2023-08-30 18:16:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:16:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:16:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 851 transitions. [2023-08-30 18:16:21,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508363201911589 [2023-08-30 18:16:21,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 851 transitions. [2023-08-30 18:16:21,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 851 transitions. [2023-08-30 18:16:21,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:21,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 851 transitions. [2023-08-30 18:16:21,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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 18:16:21,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 18:16:21,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 18:16:21,436 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 208 flow. Second operand 3 states and 851 transitions. [2023-08-30 18:16:21,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 298 flow [2023-08-30 18:16:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:16:21,443 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 180 flow [2023-08-30 18:16:21,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-30 18:16:21,448 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-30 18:16:21,449 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 180 flow [2023-08-30 18:16:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 18:16:21,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:21,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:21,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:16:21,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:21,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 92120860, now seen corresponding path program 1 times [2023-08-30 18:16:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72438903] [2023-08-30 18:16:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:21,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:21,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72438903] [2023-08-30 18:16:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72438903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:16:21,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:16:21,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:16:21,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814712551] [2023-08-30 18:16:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:16:21,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:16:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:16:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:16:21,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 558 [2023-08-30 18:16:21,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 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 18:16:21,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:21,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 558 [2023-08-30 18:16:21,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:22,640 INFO L130 PetriNetUnfolder]: 5341/8585 cut-off events. [2023-08-30 18:16:22,640 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 18:16:22,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16483 conditions, 8585 events. 5341/8585 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 51437 event pairs, 4400 based on Foata normal form. 2/6628 useless extension candidates. Maximal degree in co-relation 16464. Up to 7765 conditions per place. [2023-08-30 18:16:22,687 INFO L137 encePairwiseOnDemand]: 555/558 looper letters, 59 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 18:16:22,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 304 flow [2023-08-30 18:16:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:16:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:16:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-30 18:16:22,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49522102747909197 [2023-08-30 18:16:22,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-30 18:16:22,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-30 18:16:22,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:22,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-30 18:16:22,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 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 18:16:22,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 18:16:22,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 18:16:22,697 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 180 flow. Second operand 3 states and 829 transitions. [2023-08-30 18:16:22,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 304 flow [2023-08-30 18:16:22,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:22,702 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 192 flow [2023-08-30 18:16:22,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-30 18:16:22,704 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-08-30 18:16:22,704 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 192 flow [2023-08-30 18:16:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 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 18:16:22,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:22,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:16:22,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:22,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1317204216, now seen corresponding path program 1 times [2023-08-30 18:16:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143336633] [2023-08-30 18:16:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:22,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835360024] [2023-08-30 18:16:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:22,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:22,759 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 18:16:22,760 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 18:16:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:16:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:23,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:23,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143336633] [2023-08-30 18:16:23,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835360024] [2023-08-30 18:16:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835360024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:23,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:23,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 18:16:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113889888] [2023-08-30 18:16:23,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:16:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:16:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:16:23,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 558 [2023-08-30 18:16:23,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 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 18:16:23,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:23,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 558 [2023-08-30 18:16:23,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:24,134 INFO L130 PetriNetUnfolder]: 5341/8591 cut-off events. [2023-08-30 18:16:24,134 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-30 18:16:24,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16511 conditions, 8591 events. 5341/8591 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 51480 event pairs, 4400 based on Foata normal form. 6/6638 useless extension candidates. Maximal degree in co-relation 16471. Up to 7765 conditions per place. [2023-08-30 18:16:24,174 INFO L137 encePairwiseOnDemand]: 555/558 looper letters, 59 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2023-08-30 18:16:24,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 332 flow [2023-08-30 18:16:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:16:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:16:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1596 transitions. [2023-08-30 18:16:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767025089605735 [2023-08-30 18:16:24,179 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1596 transitions. [2023-08-30 18:16:24,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1596 transitions. [2023-08-30 18:16:24,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:24,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1596 transitions. [2023-08-30 18:16:24,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 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 18:16:24,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 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 18:16:24,191 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 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 18:16:24,191 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 192 flow. Second operand 6 states and 1596 transitions. [2023-08-30 18:16:24,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 332 flow [2023-08-30 18:16:24,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 328 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:24,195 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 230 flow [2023-08-30 18:16:24,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-08-30 18:16:24,196 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-30 18:16:24,196 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 230 flow [2023-08-30 18:16:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 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 18:16:24,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:24,197 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:24,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:16:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:24,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:24,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1106361828, now seen corresponding path program 2 times [2023-08-30 18:16:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846436826] [2023-08-30 18:16:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:24,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120705379] [2023-08-30 18:16:24,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:16:24,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:24,479 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 18:16:24,482 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 18:16:24,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:16:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:16:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:24,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:24,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:24,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846436826] [2023-08-30 18:16:24,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120705379] [2023-08-30 18:16:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120705379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:24,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 18:16:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870286102] [2023-08-30 18:16:24,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:16:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:16:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:16:24,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 558 [2023-08-30 18:16:24,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 230 flow. Second operand has 12 states, 12 states have (on average 256.75) internal successors, (3081), 12 states have internal predecessors, (3081), 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 18:16:24,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:24,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 558 [2023-08-30 18:16:24,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:26,279 INFO L130 PetriNetUnfolder]: 5341/8603 cut-off events. [2023-08-30 18:16:26,280 INFO L131 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2023-08-30 18:16:26,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16582 conditions, 8603 events. 5341/8603 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 51562 event pairs, 4400 based on Foata normal form. 12/6656 useless extension candidates. Maximal degree in co-relation 16467. Up to 7765 conditions per place. [2023-08-30 18:16:26,326 INFO L137 encePairwiseOnDemand]: 555/558 looper letters, 59 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-08-30 18:16:26,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 406 flow [2023-08-30 18:16:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:16:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:16:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3135 transitions. [2023-08-30 18:16:26,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681899641577061 [2023-08-30 18:16:26,334 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3135 transitions. [2023-08-30 18:16:26,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3135 transitions. [2023-08-30 18:16:26,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:26,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3135 transitions. [2023-08-30 18:16:26,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.25) internal successors, (3135), 12 states have internal predecessors, (3135), 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 18:16:26,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 558.0) internal successors, (7254), 13 states have internal predecessors, (7254), 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 18:16:26,356 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 558.0) internal successors, (7254), 13 states have internal predecessors, (7254), 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 18:16:26,356 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 230 flow. Second operand 12 states and 3135 transitions. [2023-08-30 18:16:26,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 406 flow [2023-08-30 18:16:26,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 392 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:26,363 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 312 flow [2023-08-30 18:16:26,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=312, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2023-08-30 18:16:26,365 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2023-08-30 18:16:26,365 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 312 flow [2023-08-30 18:16:26,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 256.75) internal successors, (3081), 12 states have internal predecessors, (3081), 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 18:16:26,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:26,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:26,380 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 18:16:26,576 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 18:16:26,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:26,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -827270500, now seen corresponding path program 3 times [2023-08-30 18:16:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194413611] [2023-08-30 18:16:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:26,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035335565] [2023-08-30 18:16:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:16:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:26,711 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 18:16:26,714 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 18:16:27,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:16:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:27,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:16:27,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:16:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:16:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194413611] [2023-08-30 18:16:27,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035335565] [2023-08-30 18:16:27,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035335565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:27,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:27,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 18:16:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639449174] [2023-08-30 18:16:27,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:27,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:16:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:27,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:16:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:16:27,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 558 [2023-08-30 18:16:27,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 257.8333333333333) internal successors, (1547), 6 states have internal predecessors, (1547), 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 18:16:27,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:27,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 558 [2023-08-30 18:16:27,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:28,538 INFO L130 PetriNetUnfolder]: 5351/8689 cut-off events. [2023-08-30 18:16:28,538 INFO L131 PetriNetUnfolder]: For 363/363 co-relation queries the response was YES. [2023-08-30 18:16:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16830 conditions, 8689 events. 5351/8689 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 52052 event pairs, 4400 based on Foata normal form. 3/6764 useless extension candidates. Maximal degree in co-relation 16523. Up to 7759 conditions per place. [2023-08-30 18:16:28,581 INFO L137 encePairwiseOnDemand]: 554/558 looper letters, 103 selfloop transitions, 6 changer transitions 0/123 dead transitions. [2023-08-30 18:16:28,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 123 transitions, 879 flow [2023-08-30 18:16:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:16:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:16:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1602 transitions. [2023-08-30 18:16:28,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-08-30 18:16:28,587 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1602 transitions. [2023-08-30 18:16:28,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1602 transitions. [2023-08-30 18:16:28,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:28,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1602 transitions. [2023-08-30 18:16:28,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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 18:16:28,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 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 18:16:28,596 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 558.0) internal successors, (3906), 7 states have internal predecessors, (3906), 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 18:16:28,596 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 312 flow. Second operand 6 states and 1602 transitions. [2023-08-30 18:16:28,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 123 transitions, 879 flow [2023-08-30 18:16:28,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 685 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-30 18:16:28,602 INFO L231 Difference]: Finished difference. Result has 98 places, 87 transitions, 347 flow [2023-08-30 18:16:28,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=98, PETRI_TRANSITIONS=87} [2023-08-30 18:16:28,605 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 32 predicate places. [2023-08-30 18:16:28,605 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 87 transitions, 347 flow [2023-08-30 18:16:28,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 257.8333333333333) internal successors, (1547), 6 states have internal predecessors, (1547), 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 18:16:28,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:28,606 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:28,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:16:28,812 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 18:16:28,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:28,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1775611448, now seen corresponding path program 4 times [2023-08-30 18:16:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:28,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750893079] [2023-08-30 18:16:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:29,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:29,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643626171] [2023-08-30 18:16:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:16:29,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:29,215 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 18:16:29,236 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 18:16:31,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:16:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 9528 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 18:16:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:16:31,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:16:31,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:31,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750893079] [2023-08-30 18:16:31,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:31,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643626171] [2023-08-30 18:16:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643626171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:31,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:31,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-30 18:16:31,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425573430] [2023-08-30 18:16:31,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:16:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:16:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:16:31,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 558 [2023-08-30 18:16:31,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 87 transitions, 347 flow. Second operand has 24 states, 24 states have (on average 256.5) internal successors, (6156), 24 states have internal predecessors, (6156), 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 18:16:31,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:31,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 558 [2023-08-30 18:16:31,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:33,680 INFO L130 PetriNetUnfolder]: 5351/8737 cut-off events. [2023-08-30 18:16:33,680 INFO L131 PetriNetUnfolder]: For 3689/3689 co-relation queries the response was YES. [2023-08-30 18:16:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16946 conditions, 8737 events. 5351/8737 cut-off events. For 3689/3689 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 52001 event pairs, 4400 based on Foata normal form. 48/6857 useless extension candidates. Maximal degree in co-relation 16528. Up to 7771 conditions per place. [2023-08-30 18:16:33,726 INFO L137 encePairwiseOnDemand]: 555/558 looper letters, 61 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2023-08-30 18:16:33,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 99 transitions, 589 flow [2023-08-30 18:16:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:16:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:16:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6213 transitions. [2023-08-30 18:16:33,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639336917562724 [2023-08-30 18:16:33,742 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6213 transitions. [2023-08-30 18:16:33,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6213 transitions. [2023-08-30 18:16:33,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:33,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6213 transitions. [2023-08-30 18:16:33,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 258.875) internal successors, (6213), 24 states have internal predecessors, (6213), 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 18:16:33,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 558.0) internal successors, (13950), 25 states have internal predecessors, (13950), 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 18:16:33,796 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 558.0) internal successors, (13950), 25 states have internal predecessors, (13950), 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 18:16:33,797 INFO L175 Difference]: Start difference. First operand has 98 places, 87 transitions, 347 flow. Second operand 24 states and 6213 transitions. [2023-08-30 18:16:33,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 99 transitions, 589 flow [2023-08-30 18:16:33,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 99 transitions, 581 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:33,969 INFO L231 Difference]: Finished difference. Result has 132 places, 99 transitions, 581 flow [2023-08-30 18:16:33,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=581, PETRI_PLACES=132, PETRI_TRANSITIONS=99} [2023-08-30 18:16:33,970 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 66 predicate places. [2023-08-30 18:16:33,971 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 99 transitions, 581 flow [2023-08-30 18:16:33,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 256.5) internal successors, (6156), 24 states have internal predecessors, (6156), 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 18:16:33,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:33,972 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:34,031 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 18:16:34,173 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 18:16:34,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:34,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1993810376, now seen corresponding path program 5 times [2023-08-30 18:16:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856186023] [2023-08-30 18:16:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:34,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:34,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746999876] [2023-08-30 18:16:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:16:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:34,965 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 18:16:34,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15