./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:32:24,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:32:24,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:32:24,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:32:24,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:32:24,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:32:24,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:32:24,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:32:24,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:32:24,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:32:24,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:32:24,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:32:24,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:32:24,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:32:24,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:32:24,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:32:24,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:32:24,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:32:24,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:32:24,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:32:24,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:32:24,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:32:24,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:32:24,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:32:24,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:32:24,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:32:24,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:32:24,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:32:24,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:32:24,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:32:24,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:32:24,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:32:24,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:32:24,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:32:24,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:32:24,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:32:24,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:32:24,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:32:24,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:32:24,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:32:24,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:32:24,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:32:24,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:32:24,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:32:24,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:32:24,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:32:24,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:32:24,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:32:24,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:32:24,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:32:24,971 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:32:24,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:32:24,972 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:32:24,972 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:32:24,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:32:24,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:32:24,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:32:24,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:32:24,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:32:24,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:32:24,973 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:32:24,973 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:32:24,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:32:24,974 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:32:24,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:32:24,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:32:24,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:32:24,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:32:24,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:32:24,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:32:24,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:32:24,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:32:24,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:32:24,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:32:24,976 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:32:24,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:32:24,977 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:32:24,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:32:24,977 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:32:24,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:32:25,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:32:25,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:32:25,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:32:25,304 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:32:25,305 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:32:25,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 08:32:26,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:32:26,881 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:32:26,882 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 08:32:26,891 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b616e01/d84600bc78d249eaa1706ae2c5a2ac9e/FLAGd5b568903 [2023-09-01 08:32:26,916 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b616e01/d84600bc78d249eaa1706ae2c5a2ac9e [2023-09-01 08:32:26,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:32:26,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:32:26,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:32:26,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:32:26,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:32:26,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:32:26" (1/1) ... [2023-09-01 08:32:26,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4118c146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:26, skipping insertion in model container [2023-09-01 08:32:26,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:32:26" (1/1) ... [2023-09-01 08:32:26,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:32:26,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:32:27,130 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-09-01 08:32:27,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:32:27,153 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:32:27,189 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-09-01 08:32:27,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:32:27,203 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:32:27,203 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:32:27,209 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:32:27,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27 WrapperNode [2023-09-01 08:32:27,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:32:27,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:32:27,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:32:27,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:32:27,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,263 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2023-09-01 08:32:27,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:32:27,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:32:27,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:32:27,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:32:27,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:32:27,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:32:27,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:32:27,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:32:27,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (1/1) ... [2023-09-01 08:32:27,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:32:27,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:27,354 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) [2023-09-01 08:32:27,384 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 [2023-09-01 08:32:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:32:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:32:27,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:32:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:32:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:32:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:32:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:32:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:32:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:32:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:32:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:32:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:32:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:32:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:32:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:32:27,401 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:32:27,536 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:32:27,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:32:27,778 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:32:27,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:32:27,903 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:32:27,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:32:27 BoogieIcfgContainer [2023-09-01 08:32:27,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:32:27,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:32:27,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:32:27,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:32:27,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:32:26" (1/3) ... [2023-09-01 08:32:27,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1126b633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:32:27, skipping insertion in model container [2023-09-01 08:32:27,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:27" (2/3) ... [2023-09-01 08:32:27,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1126b633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:32:27, skipping insertion in model container [2023-09-01 08:32:27,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:32:27" (3/3) ... [2023-09-01 08:32:27,915 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-09-01 08:32:27,922 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:32:27,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:32:27,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:32:27,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:32:28,015 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:32:28,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 290 flow [2023-09-01 08:32:28,101 INFO L130 PetriNetUnfolder]: 11/135 cut-off events. [2023-09-01 08:32:28,102 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:32:28,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 11/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-09-01 08:32:28,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 137 transitions, 290 flow [2023-09-01 08:32:28,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 119 transitions, 247 flow [2023-09-01 08:32:28,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:32:28,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 119 transitions, 247 flow [2023-09-01 08:32:28,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 119 transitions, 247 flow [2023-09-01 08:32:28,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 119 transitions, 247 flow [2023-09-01 08:32:28,149 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2023-09-01 08:32:28,149 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:32:28,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 10/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-09-01 08:32:28,151 INFO L119 LiptonReduction]: Number of co-enabled transitions 1184 [2023-09-01 08:32:33,136 INFO L134 LiptonReduction]: Checked pairs total: 1313 [2023-09-01 08:32:33,137 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-09-01 08:32:33,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:32:33,161 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;@34d49874, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:32:33,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-09-01 08:32:33,168 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:32:33,168 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:32:33,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:33,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:32:33,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:33,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash 20161, now seen corresponding path program 1 times [2023-09-01 08:32:33,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:33,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800353405] [2023-09-01 08:32:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:33,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800353405] [2023-09-01 08:32:33,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800353405] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:33,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:32:33,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:32:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096304650] [2023-09-01 08:32:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:33,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:32:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:32:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:32:33,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 08:32:33,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2023-09-01 08:32:33,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:33,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 08:32:33,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:33,783 INFO L130 PetriNetUnfolder]: 215/361 cut-off events. [2023-09-01 08:32:33,784 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 08:32:33,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 361 events. 215/361 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1511 event pairs, 126 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 305. Up to 178 conditions per place. [2023-09-01 08:32:33,799 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-09-01 08:32:33,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 168 flow [2023-09-01 08:32:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:32:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:32:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-09-01 08:32:33,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45985401459854014 [2023-09-01 08:32:33,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-09-01 08:32:33,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-09-01 08:32:33,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:33,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-09-01 08:32:33,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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) [2023-09-01 08:32:33,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:33,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:33,874 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 57 flow. Second operand 3 states and 378 transitions. [2023-09-01 08:32:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 168 flow [2023-09-01 08:32:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:32:33,879 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 60 flow [2023-09-01 08:32:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-09-01 08:32:33,883 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-09-01 08:32:33,884 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 60 flow [2023-09-01 08:32:33,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2023-09-01 08:32:33,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:33,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:32:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:32:33,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:33,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash 626251, now seen corresponding path program 1 times [2023-09-01 08:32:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034495551] [2023-09-01 08:32:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034495551] [2023-09-01 08:32:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034495551] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462264872] [2023-09-01 08:32:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:33,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:33,959 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) [2023-09-01 08:32:33,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:32:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:32:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:34,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462264872] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:34,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:32:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335038620] [2023-09-01 08:32:34,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:34,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:32:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:32:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:32:34,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 08:32:34,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 112.14285714285714) internal successors, (785), 7 states have internal predecessors, (785), 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) [2023-09-01 08:32:34,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:34,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 08:32:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:34,454 INFO L130 PetriNetUnfolder]: 539/901 cut-off events. [2023-09-01 08:32:34,454 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 08:32:34,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 901 events. 539/901 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4607 event pairs, 315 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 1475. Up to 177 conditions per place. [2023-09-01 08:32:34,459 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 82 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-09-01 08:32:34,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 92 transitions, 410 flow [2023-09-01 08:32:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:32:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:32:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2023-09-01 08:32:34,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454118873826903 [2023-09-01 08:32:34,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2023-09-01 08:32:34,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2023-09-01 08:32:34,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:34,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2023-09-01 08:32:34,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 states have internal predecessors, (871), 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) [2023-09-01 08:32:34,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 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) [2023-09-01 08:32:34,481 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 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) [2023-09-01 08:32:34,482 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 60 flow. Second operand 7 states and 871 transitions. [2023-09-01 08:32:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 92 transitions, 410 flow [2023-09-01 08:32:34,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 92 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:32:34,485 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 117 flow [2023-09-01 08:32:34,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-09-01 08:32:34,486 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-09-01 08:32:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 117 flow [2023-09-01 08:32:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.14285714285714) internal successors, (785), 7 states have internal predecessors, (785), 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) [2023-09-01 08:32:34,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:34,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 08:32:34,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:34,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:34,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash 19414753, now seen corresponding path program 1 times [2023-09-01 08:32:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:34,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071245129] [2023-09-01 08:32:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071245129] [2023-09-01 08:32:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071245129] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:34,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:32:34,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:32:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162931079] [2023-09-01 08:32:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:34,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:32:34,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:32:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:32:34,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 08:32:34,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2023-09-01 08:32:34,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:34,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 08:32:34,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:34,887 INFO L130 PetriNetUnfolder]: 536/897 cut-off events. [2023-09-01 08:32:34,888 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 08:32:34,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 897 events. 536/897 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4628 event pairs, 315 based on Foata normal form. 2/369 useless extension candidates. Maximal degree in co-relation 1100. Up to 872 conditions per place. [2023-09-01 08:32:34,893 INFO L137 encePairwiseOnDemand]: 272/274 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-09-01 08:32:34,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 136 flow [2023-09-01 08:32:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:32:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:32:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-09-01 08:32:34,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42944038929440387 [2023-09-01 08:32:34,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-09-01 08:32:34,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-09-01 08:32:34,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:34,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-09-01 08:32:34,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-09-01 08:32:34,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:34,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:34,899 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 117 flow. Second operand 3 states and 353 transitions. [2023-09-01 08:32:34,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 136 flow [2023-09-01 08:32:34,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 128 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:32:34,901 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 84 flow [2023-09-01 08:32:34,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-09-01 08:32:34,902 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-09-01 08:32:34,902 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 84 flow [2023-09-01 08:32:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2023-09-01 08:32:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:32:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 08:32:34,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:34,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash 19393452, now seen corresponding path program 1 times [2023-09-01 08:32:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:34,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824027965] [2023-09-01 08:32:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:34,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824027965] [2023-09-01 08:32:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824027965] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:34,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:32:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:32:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278659176] [2023-09-01 08:32:35,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:35,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:32:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:32:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:32:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 274 [2023-09-01 08:32:35,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-09-01 08:32:35,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:35,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 274 [2023-09-01 08:32:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:35,145 INFO L130 PetriNetUnfolder]: 476/877 cut-off events. [2023-09-01 08:32:35,146 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 08:32:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 877 events. 476/877 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4820 event pairs, 195 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 1781. Up to 611 conditions per place. [2023-09-01 08:32:35,150 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 28 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-09-01 08:32:35,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 163 flow [2023-09-01 08:32:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:32:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:32:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-09-01 08:32:35,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318734793187348 [2023-09-01 08:32:35,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:35,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-09-01 08:32:35,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:35,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:35,157 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 84 flow. Second operand 3 states and 355 transitions. [2023-09-01 08:32:35,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 163 flow [2023-09-01 08:32:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:32:35,158 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 101 flow [2023-09-01 08:32:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-09-01 08:32:35,159 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-09-01 08:32:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 101 flow [2023-09-01 08:32:35,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-09-01 08:32:35,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:32:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:32:35,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:35,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1477748490, now seen corresponding path program 2 times [2023-09-01 08:32:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136073060] [2023-09-01 08:32:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:35,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:35,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136073060] [2023-09-01 08:32:35,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136073060] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:35,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264043081] [2023-09-01 08:32:35,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:32:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:35,254 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) [2023-09-01 08:32:35,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:32:35,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:32:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:32:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:32:35,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:32:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264043081] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:35,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:32:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:32:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432871903] [2023-09-01 08:32:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:32:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:32:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:32:35,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-09-01 08:32:35,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2023-09-01 08:32:35,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:35,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-09-01 08:32:35,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:35,478 INFO L130 PetriNetUnfolder]: 476/876 cut-off events. [2023-09-01 08:32:35,479 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-09-01 08:32:35,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 876 events. 476/876 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4867 event pairs, 375 based on Foata normal form. 1/557 useless extension candidates. Maximal degree in co-relation 2055. Up to 866 conditions per place. [2023-09-01 08:32:35,484 INFO L137 encePairwiseOnDemand]: 272/274 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-09-01 08:32:35,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 24 transitions, 137 flow [2023-09-01 08:32:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:32:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:32:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-09-01 08:32:35,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318734793187348 [2023-09-01 08:32:35,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:35,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-09-01 08:32:35,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-09-01 08:32:35,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:35,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:35,491 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 101 flow. Second operand 3 states and 355 transitions. [2023-09-01 08:32:35,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 24 transitions, 137 flow [2023-09-01 08:32:35,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 125 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 08:32:35,492 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 81 flow [2023-09-01 08:32:35,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-09-01 08:32:35,493 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-09-01 08:32:35,493 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 81 flow [2023-09-01 08:32:35,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2023-09-01 08:32:35,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:35,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:35,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:35,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:35,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2069859903, now seen corresponding path program 1 times [2023-09-01 08:32:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:35,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598743015] [2023-09-01 08:32:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598743015] [2023-09-01 08:32:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598743015] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:35,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:32:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:32:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395552962] [2023-09-01 08:32:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:32:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:32:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:32:35,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 274 [2023-09-01 08:32:35,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-09-01 08:32:35,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:35,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 274 [2023-09-01 08:32:35,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:35,980 INFO L130 PetriNetUnfolder]: 390/730 cut-off events. [2023-09-01 08:32:35,980 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-09-01 08:32:35,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 730 events. 390/730 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 3929 event pairs, 309 based on Foata normal form. 4/492 useless extension candidates. Maximal degree in co-relation 1678. Up to 694 conditions per place. [2023-09-01 08:32:35,984 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2023-09-01 08:32:35,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 167 flow [2023-09-01 08:32:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:32:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:32:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-09-01 08:32:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42244525547445255 [2023-09-01 08:32:35,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-09-01 08:32:35,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-09-01 08:32:35,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:35,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-09-01 08:32:35,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 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) [2023-09-01 08:32:35,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:35,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:35,991 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 81 flow. Second operand 4 states and 463 transitions. [2023-09-01 08:32:35,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 167 flow [2023-09-01 08:32:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:32:35,992 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 94 flow [2023-09-01 08:32:35,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-09-01 08:32:35,993 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-09-01 08:32:35,993 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 94 flow [2023-09-01 08:32:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-09-01 08:32:35,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:35,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:32:35,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:35,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2141698787, now seen corresponding path program 1 times [2023-09-01 08:32:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969805126] [2023-09-01 08:32:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:36,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969805126] [2023-09-01 08:32:36,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969805126] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737954386] [2023-09-01 08:32:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:36,073 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) [2023-09-01 08:32:36,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:32:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:32:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:36,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:32:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737954386] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:36,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:32:36,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:32:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879430927] [2023-09-01 08:32:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:32:36,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:32:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:32:36,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-09-01 08:32:36,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-09-01 08:32:36,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:36,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-09-01 08:32:36,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:36,242 INFO L130 PetriNetUnfolder]: 173/334 cut-off events. [2023-09-01 08:32:36,242 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-09-01 08:32:36,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 334 events. 173/334 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1446 event pairs, 116 based on Foata normal form. 56/342 useless extension candidates. Maximal degree in co-relation 825. Up to 326 conditions per place. [2023-09-01 08:32:36,244 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 16 selfloop transitions, 1 changer transitions 3/21 dead transitions. [2023-09-01 08:32:36,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 122 flow [2023-09-01 08:32:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:32:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:32:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-09-01 08:32:36,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306569343065693 [2023-09-01 08:32:36,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-09-01 08:32:36,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-09-01 08:32:36,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:36,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-09-01 08:32:36,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-09-01 08:32:36,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:36,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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) [2023-09-01 08:32:36,249 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 94 flow. Second operand 3 states and 354 transitions. [2023-09-01 08:32:36,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 122 flow [2023-09-01 08:32:36,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 114 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 08:32:36,252 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 69 flow [2023-09-01 08:32:36,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-09-01 08:32:36,253 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-09-01 08:32:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 69 flow [2023-09-01 08:32:36,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-09-01 08:32:36,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:36,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:36,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:36,461 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:36,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1968153553, now seen corresponding path program 1 times [2023-09-01 08:32:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:36,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056920160] [2023-09-01 08:32:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:36,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:37,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056920160] [2023-09-01 08:32:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056920160] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845331962] [2023-09-01 08:32:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:37,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:37,068 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) [2023-09-01 08:32:37,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:32:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 08:32:37,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:37,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:37,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:37,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2023-09-01 08:32:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845331962] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:37,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:37,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 08:32:37,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055070407] [2023-09-01 08:32:37,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:37,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:32:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:32:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:32:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 274 [2023-09-01 08:32:38,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 69 flow. Second operand has 15 states, 15 states have (on average 91.6) internal successors, (1374), 15 states have internal predecessors, (1374), 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) [2023-09-01 08:32:38,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:38,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 274 [2023-09-01 08:32:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:38,614 INFO L130 PetriNetUnfolder]: 157/282 cut-off events. [2023-09-01 08:32:38,615 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 08:32:38,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 282 events. 157/282 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1009 event pairs, 10 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 731. Up to 153 conditions per place. [2023-09-01 08:32:38,616 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 31 selfloop transitions, 14 changer transitions 1/47 dead transitions. [2023-09-01 08:32:38,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 250 flow [2023-09-01 08:32:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 08:32:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 08:32:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 948 transitions. [2023-09-01 08:32:38,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345985401459854 [2023-09-01 08:32:38,620 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 948 transitions. [2023-09-01 08:32:38,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 948 transitions. [2023-09-01 08:32:38,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:38,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 948 transitions. [2023-09-01 08:32:38,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.8) internal successors, (948), 10 states have internal predecessors, (948), 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) [2023-09-01 08:32:38,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 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) [2023-09-01 08:32:38,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 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) [2023-09-01 08:32:38,630 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 69 flow. Second operand 10 states and 948 transitions. [2023-09-01 08:32:38,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 250 flow [2023-09-01 08:32:38,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:32:38,633 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 180 flow [2023-09-01 08:32:38,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-09-01 08:32:38,635 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2023-09-01 08:32:38,636 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 180 flow [2023-09-01 08:32:38,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.6) internal successors, (1374), 15 states have internal predecessors, (1374), 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) [2023-09-01 08:32:38,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:38,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:38,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:38,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1609976147, now seen corresponding path program 1 times [2023-09-01 08:32:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:38,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67910433] [2023-09-01 08:32:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:39,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67910433] [2023-09-01 08:32:39,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67910433] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139854967] [2023-09-01 08:32:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:39,025 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) [2023-09-01 08:32:39,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:32:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:32:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:39,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2023-09-01 08:32:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:39,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-09-01 08:32:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:39,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139854967] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:39,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:32:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659417729] [2023-09-01 08:32:39,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:39,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:32:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:32:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:32:39,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 274 [2023-09-01 08:32:39,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 105.83333333333333) internal successors, (1270), 12 states have internal predecessors, (1270), 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) [2023-09-01 08:32:39,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:39,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 274 [2023-09-01 08:32:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:39,832 INFO L130 PetriNetUnfolder]: 113/214 cut-off events. [2023-09-01 08:32:39,833 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-09-01 08:32:39,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 214 events. 113/214 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 707 event pairs, 52 based on Foata normal form. 8/208 useless extension candidates. Maximal degree in co-relation 773. Up to 167 conditions per place. [2023-09-01 08:32:39,835 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 26 selfloop transitions, 5 changer transitions 1/33 dead transitions. [2023-09-01 08:32:39,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 240 flow [2023-09-01 08:32:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:32:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:32:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 651 transitions. [2023-09-01 08:32:39,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395985401459854 [2023-09-01 08:32:39,838 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 651 transitions. [2023-09-01 08:32:39,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 651 transitions. [2023-09-01 08:32:39,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:39,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 651 transitions. [2023-09-01 08:32:39,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.5) internal successors, (651), 6 states have internal predecessors, (651), 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) [2023-09-01 08:32:39,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 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) [2023-09-01 08:32:39,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 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) [2023-09-01 08:32:39,843 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 180 flow. Second operand 6 states and 651 transitions. [2023-09-01 08:32:39,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 240 flow [2023-09-01 08:32:39,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 224 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 08:32:39,845 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 145 flow [2023-09-01 08:32:39,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-09-01 08:32:39,846 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2023-09-01 08:32:39,846 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 145 flow [2023-09-01 08:32:39,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.83333333333333) internal successors, (1270), 12 states have internal predecessors, (1270), 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) [2023-09-01 08:32:39,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:39,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:39,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:40,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:40,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:40,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 883218656, now seen corresponding path program 2 times [2023-09-01 08:32:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937941150] [2023-09-01 08:32:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:40,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:40,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937941150] [2023-09-01 08:32:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937941150] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:40,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607224689] [2023-09-01 08:32:40,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:32:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:40,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:40,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:32:40,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:32:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:32:40,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:40,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607224689] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:40,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:40,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-09-01 08:32:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871739432] [2023-09-01 08:32:40,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 08:32:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 08:32:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:32:40,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-09-01 08:32:40,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 145 flow. Second operand has 17 states, 17 states have (on average 103.58823529411765) internal successors, (1761), 17 states have internal predecessors, (1761), 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) [2023-09-01 08:32:40,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:40,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-09-01 08:32:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:41,006 INFO L130 PetriNetUnfolder]: 101/194 cut-off events. [2023-09-01 08:32:41,006 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-09-01 08:32:41,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 194 events. 101/194 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 620 event pairs, 46 based on Foata normal form. 12/192 useless extension candidates. Maximal degree in co-relation 679. Up to 167 conditions per place. [2023-09-01 08:32:41,008 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 16 selfloop transitions, 3 changer transitions 12/32 dead transitions. [2023-09-01 08:32:41,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 214 flow [2023-09-01 08:32:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:32:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:32:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 743 transitions. [2023-09-01 08:32:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38738269030239836 [2023-09-01 08:32:41,011 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 743 transitions. [2023-09-01 08:32:41,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 743 transitions. [2023-09-01 08:32:41,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:41,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 743 transitions. [2023-09-01 08:32:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 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) [2023-09-01 08:32:41,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 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) [2023-09-01 08:32:41,017 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 274.0) internal successors, (2192), 8 states have internal predecessors, (2192), 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) [2023-09-01 08:32:41,018 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 145 flow. Second operand 7 states and 743 transitions. [2023-09-01 08:32:41,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 214 flow [2023-09-01 08:32:41,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 203 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 08:32:41,020 INFO L231 Difference]: Finished difference. Result has 42 places, 20 transitions, 111 flow [2023-09-01 08:32:41,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=20} [2023-09-01 08:32:41,020 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2023-09-01 08:32:41,021 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 20 transitions, 111 flow [2023-09-01 08:32:41,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.58823529411765) internal successors, (1761), 17 states have internal predecessors, (1761), 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) [2023-09-01 08:32:41,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:41,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:41,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:41,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:41,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:41,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1451554975, now seen corresponding path program 3 times [2023-09-01 08:32:41,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:41,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321772877] [2023-09-01 08:32:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:41,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:32:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321772877] [2023-09-01 08:32:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321772877] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:32:41,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:32:41,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:32:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896497282] [2023-09-01 08:32:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:32:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:32:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:32:41,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 274 [2023-09-01 08:32:41,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 20 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 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) [2023-09-01 08:32:41,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:41,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 274 [2023-09-01 08:32:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:41,441 INFO L130 PetriNetUnfolder]: 184/321 cut-off events. [2023-09-01 08:32:41,442 INFO L131 PetriNetUnfolder]: For 498/498 co-relation queries the response was YES. [2023-09-01 08:32:41,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 321 events. 184/321 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1153 event pairs, 33 based on Foata normal form. 36/327 useless extension candidates. Maximal degree in co-relation 1152. Up to 181 conditions per place. [2023-09-01 08:32:41,444 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 23 selfloop transitions, 6 changer transitions 1/31 dead transitions. [2023-09-01 08:32:41,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 231 flow [2023-09-01 08:32:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:32:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:32:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-09-01 08:32:41,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233576642335766 [2023-09-01 08:32:41,446 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-09-01 08:32:41,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-09-01 08:32:41,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:41,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-09-01 08:32:41,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 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) [2023-09-01 08:32:41,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:41,450 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:41,450 INFO L175 Difference]: Start difference. First operand has 42 places, 20 transitions, 111 flow. Second operand 4 states and 464 transitions. [2023-09-01 08:32:41,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 231 flow [2023-09-01 08:32:41,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 201 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 08:32:41,453 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 148 flow [2023-09-01 08:32:41,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-09-01 08:32:41,453 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-09-01 08:32:41,454 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 148 flow [2023-09-01 08:32:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 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) [2023-09-01 08:32:41,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:41,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 08:32:41,455 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:41,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash -878108369, now seen corresponding path program 1 times [2023-09-01 08:32:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922319317] [2023-09-01 08:32:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922319317] [2023-09-01 08:32:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922319317] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006986750] [2023-09-01 08:32:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:42,396 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:42,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:32:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 08:32:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:32:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:42,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:42,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 45 [2023-09-01 08:32:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:32:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006986750] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:42,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:32:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 3] total 12 [2023-09-01 08:32:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789238454] [2023-09-01 08:32:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:32:42,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:32:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:32:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:32:42,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 274 [2023-09-01 08:32:42,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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) [2023-09-01 08:32:42,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:42,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 274 [2023-09-01 08:32:42,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:32:42,860 INFO L130 PetriNetUnfolder]: 160/297 cut-off events. [2023-09-01 08:32:42,861 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-09-01 08:32:42,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 297 events. 160/297 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1111 event pairs, 15 based on Foata normal form. 24/315 useless extension candidates. Maximal degree in co-relation 1120. Up to 163 conditions per place. [2023-09-01 08:32:42,863 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 22 selfloop transitions, 5 changer transitions 1/29 dead transitions. [2023-09-01 08:32:42,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 219 flow [2023-09-01 08:32:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:32:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:32:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-09-01 08:32:42,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978102189781022 [2023-09-01 08:32:42,866 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-09-01 08:32:42,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-09-01 08:32:42,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:42,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-09-01 08:32:42,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-09-01 08:32:42,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:42,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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) [2023-09-01 08:32:42,869 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 148 flow. Second operand 4 states and 436 transitions. [2023-09-01 08:32:42,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 219 flow [2023-09-01 08:32:42,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 08:32:42,872 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 152 flow [2023-09-01 08:32:42,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-09-01 08:32:42,873 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-09-01 08:32:42,873 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 152 flow [2023-09-01 08:32:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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) [2023-09-01 08:32:42,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:32:42,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:32:42,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:32:43,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:43,080 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:32:43,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:32:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2048529678, now seen corresponding path program 4 times [2023-09-01 08:32:43,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:32:43,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635642052] [2023-09-01 08:32:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:32:43,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:32:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:32:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:44,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:32:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635642052] [2023-09-01 08:32:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635642052] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:32:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260373963] [2023-09-01 08:32:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:32:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:32:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:44,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:32:44,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:32:44,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:32:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:32:44,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 08:32:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:32:44,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:32:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:32:44,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:32:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:32:44,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:32:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:44,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:32:45,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:45,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2023-09-01 08:32:45,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:45,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 283 treesize of output 313 [2023-09-01 08:32:46,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:46,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 220 [2023-09-01 08:32:46,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:32:46,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 165 [2023-09-01 08:32:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:32:52,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260373963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:32:52,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:32:52,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-09-01 08:32:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499465294] [2023-09-01 08:32:52,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:32:52,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:32:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:32:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:32:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=653, Unknown=1, NotChecked=0, Total=812 [2023-09-01 08:32:53,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:32:53,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 152 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:32:53,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:32:53,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:32:53,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:01,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:33:03,068 INFO L130 PetriNetUnfolder]: 511/903 cut-off events. [2023-09-01 08:33:03,068 INFO L131 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2023-09-01 08:33:03,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 903 events. 511/903 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4163 event pairs, 32 based on Foata normal form. 52/955 useless extension candidates. Maximal degree in co-relation 3561. Up to 501 conditions per place. [2023-09-01 08:33:03,074 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 104 selfloop transitions, 82 changer transitions 6/192 dead transitions. [2023-09-01 08:33:03,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 192 transitions, 1439 flow [2023-09-01 08:33:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 08:33:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 08:33:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3417 transitions. [2023-09-01 08:33:03,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27712895377128954 [2023-09-01 08:33:03,087 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3417 transitions. [2023-09-01 08:33:03,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3417 transitions. [2023-09-01 08:33:03,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:03,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3417 transitions. [2023-09-01 08:33:03,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 75.93333333333334) internal successors, (3417), 45 states have internal predecessors, (3417), 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) [2023-09-01 08:33:03,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:33:03,114 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:33:03,114 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 152 flow. Second operand 45 states and 3417 transitions. [2023-09-01 08:33:03,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 192 transitions, 1439 flow [2023-09-01 08:33:03,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 192 transitions, 1433 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:33:03,120 INFO L231 Difference]: Finished difference. Result has 91 places, 111 transitions, 1140 flow [2023-09-01 08:33:03,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1140, PETRI_PLACES=91, PETRI_TRANSITIONS=111} [2023-09-01 08:33:03,121 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-09-01 08:33:03,121 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 111 transitions, 1140 flow [2023-09-01 08:33:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:33:03,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:03,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:03,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 08:33:03,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:03,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2048529677, now seen corresponding path program 1 times [2023-09-01 08:33:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:03,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043166588] [2023-09-01 08:33:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:04,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043166588] [2023-09-01 08:33:04,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043166588] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338480585] [2023-09-01 08:33:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:04,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:04,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:04,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:04,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:33:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 08:33:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:04,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-09-01 08:33:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:04,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:33:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:04,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:33:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:05,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:05,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 100 [2023-09-01 08:33:05,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:05,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 573 treesize of output 569 [2023-09-01 08:33:05,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:05,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 180 treesize of output 190 [2023-09-01 08:33:06,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:06,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 163 [2023-09-01 08:33:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:10,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338480585] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:10,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:10,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-09-01 08:33:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192743799] [2023-09-01 08:33:10,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:33:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:33:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=640, Unknown=2, NotChecked=0, Total=812 [2023-09-01 08:33:10,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:33:10,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 111 transitions, 1140 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:33:10,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:10,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:33:10,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:16,767 INFO L130 PetriNetUnfolder]: 557/1005 cut-off events. [2023-09-01 08:33:16,768 INFO L131 PetriNetUnfolder]: For 5639/5639 co-relation queries the response was YES. [2023-09-01 08:33:16,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1005 events. 557/1005 cut-off events. For 5639/5639 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4982 event pairs, 30 based on Foata normal form. 36/1041 useless extension candidates. Maximal degree in co-relation 5134. Up to 547 conditions per place. [2023-09-01 08:33:16,780 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 124 selfloop transitions, 67 changer transitions 7/198 dead transitions. [2023-09-01 08:33:16,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 198 transitions, 2072 flow [2023-09-01 08:33:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 08:33:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 08:33:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2415 transitions. [2023-09-01 08:33:16,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27543339416058393 [2023-09-01 08:33:16,789 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2415 transitions. [2023-09-01 08:33:16,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2415 transitions. [2023-09-01 08:33:16,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:16,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2415 transitions. [2023-09-01 08:33:16,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 75.46875) internal successors, (2415), 32 states have internal predecessors, (2415), 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) [2023-09-01 08:33:16,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 274.0) internal successors, (9042), 33 states have internal predecessors, (9042), 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) [2023-09-01 08:33:16,819 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 274.0) internal successors, (9042), 33 states have internal predecessors, (9042), 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) [2023-09-01 08:33:16,820 INFO L175 Difference]: Start difference. First operand has 91 places, 111 transitions, 1140 flow. Second operand 32 states and 2415 transitions. [2023-09-01 08:33:16,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 198 transitions, 2072 flow [2023-09-01 08:33:16,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 198 transitions, 1734 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-09-01 08:33:16,850 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 1264 flow [2023-09-01 08:33:16,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1264, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2023-09-01 08:33:16,851 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 93 predicate places. [2023-09-01 08:33:16,851 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 1264 flow [2023-09-01 08:33:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:33:16,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:16,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:16,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:33:17,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:17,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2048502708, now seen corresponding path program 5 times [2023-09-01 08:33:17,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:17,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391690670] [2023-09-01 08:33:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391690670] [2023-09-01 08:33:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391690670] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617634114] [2023-09-01 08:33:18,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:33:18,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:18,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:18,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:18,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:33:18,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:33:18,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:18,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 08:33:18,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:18,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:18,971 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 08:33:18,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 184 [2023-09-01 08:33:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617634114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:19,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:19,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-09-01 08:33:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17838835] [2023-09-01 08:33:19,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:33:19,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:33:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:33:20,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 274 [2023-09-01 08:33:20,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 1264 flow. Second operand has 26 states, 26 states have (on average 87.38461538461539) internal successors, (2272), 26 states have internal predecessors, (2272), 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) [2023-09-01 08:33:20,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:20,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 274 [2023-09-01 08:33:20,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:21,937 INFO L130 PetriNetUnfolder]: 659/1151 cut-off events. [2023-09-01 08:33:21,938 INFO L131 PetriNetUnfolder]: For 8649/8649 co-relation queries the response was YES. [2023-09-01 08:33:21,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5808 conditions, 1151 events. 659/1151 cut-off events. For 8649/8649 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5809 event pairs, 42 based on Foata normal form. 32/1183 useless extension candidates. Maximal degree in co-relation 5772. Up to 449 conditions per place. [2023-09-01 08:33:21,949 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 132 selfloop transitions, 82 changer transitions 4/218 dead transitions. [2023-09-01 08:33:21,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 218 transitions, 2292 flow [2023-09-01 08:33:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:33:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:33:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2163 transitions. [2023-09-01 08:33:21,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3289233576642336 [2023-09-01 08:33:21,954 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2163 transitions. [2023-09-01 08:33:21,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2163 transitions. [2023-09-01 08:33:21,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:21,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2163 transitions. [2023-09-01 08:33:21,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.125) internal successors, (2163), 24 states have internal predecessors, (2163), 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) [2023-09-01 08:33:21,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 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) [2023-09-01 08:33:21,965 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 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) [2023-09-01 08:33:21,965 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 1264 flow. Second operand 24 states and 2163 transitions. [2023-09-01 08:33:21,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 218 transitions, 2292 flow [2023-09-01 08:33:22,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 218 transitions, 2149 flow, removed 38 selfloop flow, removed 22 redundant places. [2023-09-01 08:33:22,029 INFO L231 Difference]: Finished difference. Result has 127 places, 157 transitions, 1684 flow [2023-09-01 08:33:22,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1684, PETRI_PLACES=127, PETRI_TRANSITIONS=157} [2023-09-01 08:33:22,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2023-09-01 08:33:22,030 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 157 transitions, 1684 flow [2023-09-01 08:33:22,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 87.38461538461539) internal successors, (2272), 26 states have internal predecessors, (2272), 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) [2023-09-01 08:33:22,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:22,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:22,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 08:33:22,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:22,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2048502707, now seen corresponding path program 2 times [2023-09-01 08:33:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147204876] [2023-09-01 08:33:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147204876] [2023-09-01 08:33:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147204876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844963363] [2023-09-01 08:33:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:23,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:33:23,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:33:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 08:33:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:23,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:33:23,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:23,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:24,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:24,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 103 [2023-09-01 08:33:24,993 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-09-01 08:33:24,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 699 treesize of output 630 [2023-09-01 08:33:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:25,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:25,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:25,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 183 [2023-09-01 08:33:25,047 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-09-01 08:33:25,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 155 [2023-09-01 08:33:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844963363] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:25,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-09-01 08:33:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757425634] [2023-09-01 08:33:25,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:33:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:33:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=619, Unknown=3, NotChecked=0, Total=812 [2023-09-01 08:33:26,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:33:26,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 157 transitions, 1684 flow. Second operand has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:33:26,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:26,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:33:26,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:28,403 INFO L130 PetriNetUnfolder]: 463/839 cut-off events. [2023-09-01 08:33:28,403 INFO L131 PetriNetUnfolder]: For 5316/5316 co-relation queries the response was YES. [2023-09-01 08:33:28,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4413 conditions, 839 events. 463/839 cut-off events. For 5316/5316 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3701 event pairs, 50 based on Foata normal form. 30/869 useless extension candidates. Maximal degree in co-relation 4373. Up to 618 conditions per place. [2023-09-01 08:33:28,410 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 97 selfloop transitions, 43 changer transitions 16/156 dead transitions. [2023-09-01 08:33:28,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 156 transitions, 1652 flow [2023-09-01 08:33:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:33:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:33:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1813 transitions. [2023-09-01 08:33:28,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2756995133819951 [2023-09-01 08:33:28,415 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1813 transitions. [2023-09-01 08:33:28,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1813 transitions. [2023-09-01 08:33:28,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:28,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1813 transitions. [2023-09-01 08:33:28,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.54166666666667) internal successors, (1813), 24 states have internal predecessors, (1813), 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) [2023-09-01 08:33:28,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 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) [2023-09-01 08:33:28,427 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 274.0) internal successors, (6850), 25 states have internal predecessors, (6850), 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) [2023-09-01 08:33:28,427 INFO L175 Difference]: Start difference. First operand has 127 places, 157 transitions, 1684 flow. Second operand 24 states and 1813 transitions. [2023-09-01 08:33:28,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 156 transitions, 1652 flow [2023-09-01 08:33:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 156 transitions, 1495 flow, removed 56 selfloop flow, removed 14 redundant places. [2023-09-01 08:33:28,451 INFO L231 Difference]: Finished difference. Result has 129 places, 120 transitions, 1216 flow [2023-09-01 08:33:28,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1216, PETRI_PLACES=129, PETRI_TRANSITIONS=120} [2023-09-01 08:33:28,452 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 101 predicate places. [2023-09-01 08:33:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 120 transitions, 1216 flow [2023-09-01 08:33:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.24137931034483) internal successors, (2124), 29 states have internal predecessors, (2124), 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) [2023-09-01 08:33:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:28,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 08:33:28,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:28,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1619895647, now seen corresponding path program 3 times [2023-09-01 08:33:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396120940] [2023-09-01 08:33:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:29,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:29,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396120940] [2023-09-01 08:33:29,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396120940] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374372301] [2023-09-01 08:33:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:33:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:29,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:29,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:33:30,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:33:30,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 08:33:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:30,443 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 08:33:30,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 164 [2023-09-01 08:33:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374372301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2023-09-01 08:33:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407470715] [2023-09-01 08:33:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:33:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:33:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-09-01 08:33:31,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 274 [2023-09-01 08:33:31,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 120 transitions, 1216 flow. Second operand has 22 states, 22 states have (on average 88.72727272727273) internal successors, (1952), 22 states have internal predecessors, (1952), 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) [2023-09-01 08:33:31,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:31,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 274 [2023-09-01 08:33:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:33,545 INFO L130 PetriNetUnfolder]: 657/1157 cut-off events. [2023-09-01 08:33:33,545 INFO L131 PetriNetUnfolder]: For 9821/9821 co-relation queries the response was YES. [2023-09-01 08:33:33,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6153 conditions, 1157 events. 657/1157 cut-off events. For 9821/9821 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5334 event pairs, 20 based on Foata normal form. 48/1205 useless extension candidates. Maximal degree in co-relation 6113. Up to 417 conditions per place. [2023-09-01 08:33:33,557 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 124 selfloop transitions, 145 changer transitions 9/278 dead transitions. [2023-09-01 08:33:33,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 278 transitions, 3141 flow [2023-09-01 08:33:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 08:33:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 08:33:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3009 transitions. [2023-09-01 08:33:33,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33278035832780356 [2023-09-01 08:33:33,565 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3009 transitions. [2023-09-01 08:33:33,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3009 transitions. [2023-09-01 08:33:33,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:33,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3009 transitions. [2023-09-01 08:33:33,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 91.18181818181819) internal successors, (3009), 33 states have internal predecessors, (3009), 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) [2023-09-01 08:33:33,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 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) [2023-09-01 08:33:33,585 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 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) [2023-09-01 08:33:33,586 INFO L175 Difference]: Start difference. First operand has 129 places, 120 transitions, 1216 flow. Second operand 33 states and 3009 transitions. [2023-09-01 08:33:33,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 278 transitions, 3141 flow [2023-09-01 08:33:33,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 278 transitions, 3000 flow, removed 45 selfloop flow, removed 20 redundant places. [2023-09-01 08:33:33,616 INFO L231 Difference]: Finished difference. Result has 143 places, 200 transitions, 2713 flow [2023-09-01 08:33:33,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2713, PETRI_PLACES=143, PETRI_TRANSITIONS=200} [2023-09-01 08:33:33,617 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2023-09-01 08:33:33,617 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 200 transitions, 2713 flow [2023-09-01 08:33:33,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.72727272727273) internal successors, (1952), 22 states have internal predecessors, (1952), 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) [2023-09-01 08:33:33,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:33,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:33,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 08:33:33,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:33,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1619923517, now seen corresponding path program 6 times [2023-09-01 08:33:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:33,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373722927] [2023-09-01 08:33:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373722927] [2023-09-01 08:33:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373722927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367134584] [2023-09-01 08:33:33,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:33:33,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:33,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:33,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:33,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:33:34,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:33:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:33:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:34,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:34,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 132 [2023-09-01 08:33:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:34,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:34,564 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 08:33:34,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 157 [2023-09-01 08:33:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:34,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367134584] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:34,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:34,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-09-01 08:33:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234871210] [2023-09-01 08:33:34,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:33:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:33:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:33:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 274 [2023-09-01 08:33:34,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 200 transitions, 2713 flow. Second operand has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 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) [2023-09-01 08:33:34,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:34,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 274 [2023-09-01 08:33:34,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:35,074 INFO L130 PetriNetUnfolder]: 913/1605 cut-off events. [2023-09-01 08:33:35,074 INFO L131 PetriNetUnfolder]: For 21710/21710 co-relation queries the response was YES. [2023-09-01 08:33:35,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10165 conditions, 1605 events. 913/1605 cut-off events. For 21710/21710 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8336 event pairs, 112 based on Foata normal form. 84/1689 useless extension candidates. Maximal degree in co-relation 10117. Up to 799 conditions per place. [2023-09-01 08:33:35,095 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 168 selfloop transitions, 119 changer transitions 3/290 dead transitions. [2023-09-01 08:33:35,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 290 transitions, 4568 flow [2023-09-01 08:33:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:33:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:33:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 862 transitions. [2023-09-01 08:33:35,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39324817518248173 [2023-09-01 08:33:35,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 862 transitions. [2023-09-01 08:33:35,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 862 transitions. [2023-09-01 08:33:35,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:35,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 862 transitions. [2023-09-01 08:33:35,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 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) [2023-09-01 08:33:35,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 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) [2023-09-01 08:33:35,101 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 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) [2023-09-01 08:33:35,101 INFO L175 Difference]: Start difference. First operand has 143 places, 200 transitions, 2713 flow. Second operand 8 states and 862 transitions. [2023-09-01 08:33:35,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 290 transitions, 4568 flow [2023-09-01 08:33:35,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 290 transitions, 4131 flow, removed 163 selfloop flow, removed 13 redundant places. [2023-09-01 08:33:35,178 INFO L231 Difference]: Finished difference. Result has 142 places, 261 transitions, 3761 flow [2023-09-01 08:33:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3761, PETRI_PLACES=142, PETRI_TRANSITIONS=261} [2023-09-01 08:33:35,179 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2023-09-01 08:33:35,179 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 261 transitions, 3761 flow [2023-09-01 08:33:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 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) [2023-09-01 08:33:35,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:35,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:35,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 08:33:35,386 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:35,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1296088912, now seen corresponding path program 7 times [2023-09-01 08:33:35,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:35,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807683281] [2023-09-01 08:33:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:35,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:36,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:36,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807683281] [2023-09-01 08:33:36,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807683281] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:36,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340175776] [2023-09-01 08:33:36,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:33:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:36,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:36,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:33:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:36,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 08:33:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:36,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:33:36,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:36,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:38,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:38,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 143 [2023-09-01 08:33:38,195 INFO L321 Elim1Store]: treesize reduction 26, result has 69.4 percent of original size [2023-09-01 08:33:38,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 969 treesize of output 905 [2023-09-01 08:33:38,242 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:38,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:38,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 290 treesize of output 293 [2023-09-01 08:33:38,328 INFO L321 Elim1Store]: treesize reduction 34, result has 60.0 percent of original size [2023-09-01 08:33:38,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 295 treesize of output 251 [2023-09-01 08:33:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:40,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340175776] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:40,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 34 [2023-09-01 08:33:40,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342592106] [2023-09-01 08:33:40,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 08:33:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 08:33:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1006, Unknown=4, NotChecked=0, Total=1260 [2023-09-01 08:33:40,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:33:40,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 261 transitions, 3761 flow. Second operand has 36 states, 36 states have (on average 73.25) internal successors, (2637), 36 states have internal predecessors, (2637), 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) [2023-09-01 08:33:40,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:40,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:33:40,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:45,162 INFO L130 PetriNetUnfolder]: 1085/1949 cut-off events. [2023-09-01 08:33:45,163 INFO L131 PetriNetUnfolder]: For 31969/31969 co-relation queries the response was YES. [2023-09-01 08:33:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13136 conditions, 1949 events. 1085/1949 cut-off events. For 31969/31969 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11268 event pairs, 78 based on Foata normal form. 140/2089 useless extension candidates. Maximal degree in co-relation 13082. Up to 795 conditions per place. [2023-09-01 08:33:45,184 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 216 selfloop transitions, 189 changer transitions 13/418 dead transitions. [2023-09-01 08:33:45,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 418 transitions, 6485 flow [2023-09-01 08:33:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 08:33:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 08:33:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3957 transitions. [2023-09-01 08:33:45,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2777231892195396 [2023-09-01 08:33:45,192 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3957 transitions. [2023-09-01 08:33:45,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3957 transitions. [2023-09-01 08:33:45,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:45,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3957 transitions. [2023-09-01 08:33:45,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 76.09615384615384) internal successors, (3957), 52 states have internal predecessors, (3957), 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) [2023-09-01 08:33:45,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 274.0) internal successors, (14522), 53 states have internal predecessors, (14522), 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) [2023-09-01 08:33:45,210 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 274.0) internal successors, (14522), 53 states have internal predecessors, (14522), 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) [2023-09-01 08:33:45,210 INFO L175 Difference]: Start difference. First operand has 142 places, 261 transitions, 3761 flow. Second operand 52 states and 3957 transitions. [2023-09-01 08:33:45,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 418 transitions, 6485 flow [2023-09-01 08:33:45,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 418 transitions, 5966 flow, removed 178 selfloop flow, removed 3 redundant places. [2023-09-01 08:33:45,312 INFO L231 Difference]: Finished difference. Result has 207 places, 286 transitions, 4859 flow [2023-09-01 08:33:45,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4859, PETRI_PLACES=207, PETRI_TRANSITIONS=286} [2023-09-01 08:33:45,313 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 179 predicate places. [2023-09-01 08:33:45,313 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 286 transitions, 4859 flow [2023-09-01 08:33:45,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 73.25) internal successors, (2637), 36 states have internal predecessors, (2637), 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) [2023-09-01 08:33:45,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:45,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:45,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:45,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:45,520 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:33:45,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1321980112, now seen corresponding path program 8 times [2023-09-01 08:33:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:45,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137912830] [2023-09-01 08:33:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137912830] [2023-09-01 08:33:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137912830] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542942001] [2023-09-01 08:33:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:46,333 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:46,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:33:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:33:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:46,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 08:33:46,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:46,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:46,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-09-01 08:33:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:33:46,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:46,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:33:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:47,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:49,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:49,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 269 treesize of output 154 [2023-09-01 08:33:49,169 INFO L321 Elim1Store]: treesize reduction 74, result has 52.9 percent of original size [2023-09-01 08:33:49,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 966 treesize of output 922 [2023-09-01 08:33:49,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,223 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,227 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,229 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:49,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:49,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 288 treesize of output 263 [2023-09-01 08:33:49,308 INFO L321 Elim1Store]: treesize reduction 82, result has 20.4 percent of original size [2023-09-01 08:33:49,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 221 [2023-09-01 08:33:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542942001] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:51,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-09-01 08:33:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428406284] [2023-09-01 08:33:51,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:51,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 08:33:51,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 08:33:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1093, Unknown=4, NotChecked=0, Total=1406 [2023-09-01 08:33:52,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:33:52,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 286 transitions, 4859 flow. Second operand has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 states have internal predecessors, (2781), 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) [2023-09-01 08:33:52,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:52,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:33:52,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:56,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:18,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:20,776 INFO L130 PetriNetUnfolder]: 1677/3049 cut-off events. [2023-09-01 08:34:20,776 INFO L131 PetriNetUnfolder]: For 61667/61667 co-relation queries the response was YES. [2023-09-01 08:34:20,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21560 conditions, 3049 events. 1677/3049 cut-off events. For 61667/61667 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19404 event pairs, 122 based on Foata normal form. 70/3119 useless extension candidates. Maximal degree in co-relation 21485. Up to 1232 conditions per place. [2023-09-01 08:34:20,806 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 282 selfloop transitions, 298 changer transitions 21/601 dead transitions. [2023-09-01 08:34:20,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 601 transitions, 9694 flow [2023-09-01 08:34:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-09-01 08:34:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-09-01 08:34:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 5616 transitions. [2023-09-01 08:34:20,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27697770763464197 [2023-09-01 08:34:20,815 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 5616 transitions. [2023-09-01 08:34:20,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 5616 transitions. [2023-09-01 08:34:20,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:20,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 5616 transitions. [2023-09-01 08:34:20,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 75.89189189189189) internal successors, (5616), 74 states have internal predecessors, (5616), 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) [2023-09-01 08:34:20,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 274.0) internal successors, (20550), 75 states have internal predecessors, (20550), 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) [2023-09-01 08:34:20,841 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 274.0) internal successors, (20550), 75 states have internal predecessors, (20550), 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) [2023-09-01 08:34:20,842 INFO L175 Difference]: Start difference. First operand has 207 places, 286 transitions, 4859 flow. Second operand 74 states and 5616 transitions. [2023-09-01 08:34:20,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 601 transitions, 9694 flow [2023-09-01 08:34:21,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 601 transitions, 9278 flow, removed 177 selfloop flow, removed 15 redundant places. [2023-09-01 08:34:21,114 INFO L231 Difference]: Finished difference. Result has 287 places, 465 transitions, 8759 flow [2023-09-01 08:34:21,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=8759, PETRI_PLACES=287, PETRI_TRANSITIONS=465} [2023-09-01 08:34:21,115 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 259 predicate places. [2023-09-01 08:34:21,115 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 465 transitions, 8759 flow [2023-09-01 08:34:21,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 states have internal predecessors, (2781), 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) [2023-09-01 08:34:21,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:21,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:21,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:21,322 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:34:21,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1296088913, now seen corresponding path program 4 times [2023-09-01 08:34:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:21,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728648975] [2023-09-01 08:34:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:21,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728648975] [2023-09-01 08:34:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728648975] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147007615] [2023-09-01 08:34:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:34:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:22,672 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:22,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:34:22,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:34:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 08:34:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:34:23,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:23,677 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:34:23,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 245 [2023-09-01 08:34:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:34:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147007615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:24,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 27 [2023-09-01 08:34:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854173424] [2023-09-01 08:34:24,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:34:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:34:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-09-01 08:34:26,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-09-01 08:34:26,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 465 transitions, 8759 flow. Second operand has 29 states, 29 states have (on average 94.44827586206897) internal successors, (2739), 29 states have internal predecessors, (2739), 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) [2023-09-01 08:34:26,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:26,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-09-01 08:34:26,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:30,362 INFO L130 PetriNetUnfolder]: 2231/4059 cut-off events. [2023-09-01 08:34:30,362 INFO L131 PetriNetUnfolder]: For 107485/107485 co-relation queries the response was YES. [2023-09-01 08:34:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30519 conditions, 4059 events. 2231/4059 cut-off events. For 107485/107485 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26968 event pairs, 174 based on Foata normal form. 220/4279 useless extension candidates. Maximal degree in co-relation 30423. Up to 1679 conditions per place. [2023-09-01 08:34:30,407 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 424 selfloop transitions, 284 changer transitions 12/720 dead transitions. [2023-09-01 08:34:30,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 720 transitions, 14024 flow [2023-09-01 08:34:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 08:34:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 08:34:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4391 transitions. [2023-09-01 08:34:30,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35612327656123277 [2023-09-01 08:34:30,413 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4391 transitions. [2023-09-01 08:34:30,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4391 transitions. [2023-09-01 08:34:30,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:30,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4391 transitions. [2023-09-01 08:34:30,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 97.57777777777778) internal successors, (4391), 45 states have internal predecessors, (4391), 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) [2023-09-01 08:34:30,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:34:30,429 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:34:30,429 INFO L175 Difference]: Start difference. First operand has 287 places, 465 transitions, 8759 flow. Second operand 45 states and 4391 transitions. [2023-09-01 08:34:30,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 720 transitions, 14024 flow [2023-09-01 08:34:30,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 720 transitions, 12520 flow, removed 701 selfloop flow, removed 31 redundant places. [2023-09-01 08:34:30,972 INFO L231 Difference]: Finished difference. Result has 323 places, 565 transitions, 10556 flow [2023-09-01 08:34:30,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=6993, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10556, PETRI_PLACES=323, PETRI_TRANSITIONS=565} [2023-09-01 08:34:30,973 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2023-09-01 08:34:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 565 transitions, 10556 flow [2023-09-01 08:34:30,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.44827586206897) internal successors, (2739), 29 states have internal predecessors, (2739), 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) [2023-09-01 08:34:30,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:30,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:30,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:31,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:31,182 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:34:31,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1322843153, now seen corresponding path program 5 times [2023-09-01 08:34:31,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:31,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909943612] [2023-09-01 08:34:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:31,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909943612] [2023-09-01 08:34:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909943612] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295271324] [2023-09-01 08:34:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:34:33,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:33,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:34:33,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:34:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 08:34:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:34:34,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:34,545 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:34:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 242 [2023-09-01 08:34:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:34:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295271324] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:35,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:35,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 27 [2023-09-01 08:34:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418050124] [2023-09-01 08:34:35,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:34:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:34:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-09-01 08:34:36,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 274 [2023-09-01 08:34:36,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 565 transitions, 10556 flow. Second operand has 29 states, 29 states have (on average 88.44827586206897) internal successors, (2565), 29 states have internal predecessors, (2565), 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) [2023-09-01 08:34:36,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:36,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 274 [2023-09-01 08:34:36,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:39,773 INFO L130 PetriNetUnfolder]: 2425/4381 cut-off events. [2023-09-01 08:34:39,774 INFO L131 PetriNetUnfolder]: For 153189/153189 co-relation queries the response was YES. [2023-09-01 08:34:39,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35592 conditions, 4381 events. 2425/4381 cut-off events. For 153189/153189 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29147 event pairs, 210 based on Foata normal form. 78/4459 useless extension candidates. Maximal degree in co-relation 35471. Up to 2439 conditions per place. [2023-09-01 08:34:39,827 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 524 selfloop transitions, 185 changer transitions 10/719 dead transitions. [2023-09-01 08:34:39,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 719 transitions, 14137 flow [2023-09-01 08:34:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 08:34:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 08:34:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3364 transitions. [2023-09-01 08:34:39,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318208719668574 [2023-09-01 08:34:39,832 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3364 transitions. [2023-09-01 08:34:39,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3364 transitions. [2023-09-01 08:34:39,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:39,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3364 transitions. [2023-09-01 08:34:39,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.91891891891892) internal successors, (3364), 37 states have internal predecessors, (3364), 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) [2023-09-01 08:34:39,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 274.0) internal successors, (10412), 38 states have internal predecessors, (10412), 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) [2023-09-01 08:34:39,844 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 274.0) internal successors, (10412), 38 states have internal predecessors, (10412), 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) [2023-09-01 08:34:39,844 INFO L175 Difference]: Start difference. First operand has 323 places, 565 transitions, 10556 flow. Second operand 37 states and 3364 transitions. [2023-09-01 08:34:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 719 transitions, 14137 flow [2023-09-01 08:34:40,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 719 transitions, 13140 flow, removed 385 selfloop flow, removed 25 redundant places. [2023-09-01 08:34:40,751 INFO L231 Difference]: Finished difference. Result has 346 places, 594 transitions, 11138 flow [2023-09-01 08:34:40,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11138, PETRI_PLACES=346, PETRI_TRANSITIONS=594} [2023-09-01 08:34:40,752 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2023-09-01 08:34:40,753 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 594 transitions, 11138 flow [2023-09-01 08:34:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 88.44827586206897) internal successors, (2565), 29 states have internal predecessors, (2565), 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) [2023-09-01 08:34:40,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:40,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:40,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 08:34:40,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:40,954 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:34:40,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1322007083, now seen corresponding path program 6 times [2023-09-01 08:34:40,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861777239] [2023-09-01 08:34:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:42,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861777239] [2023-09-01 08:34:42,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861777239] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051425160] [2023-09-01 08:34:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:34:42,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:42,132 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:42,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:34:42,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:34:42,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 08:34:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:42,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:34:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:34:42,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:34:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:34:42,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:34:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:44,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:44,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-09-01 08:34:44,393 INFO L321 Elim1Store]: treesize reduction 30, result has 78.7 percent of original size [2023-09-01 08:34:44,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 803 treesize of output 801 [2023-09-01 08:34:44,423 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:44,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:44,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:44,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:44,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 270 [2023-09-01 08:34:44,534 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 08:34:44,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 229 [2023-09-01 08:34:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051425160] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:53,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-09-01 08:34:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635977968] [2023-09-01 08:34:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 08:34:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 08:34:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1106, Unknown=5, NotChecked=0, Total=1406 [2023-09-01 08:34:53,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:34:53,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 594 transitions, 11138 flow. Second operand has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 states have internal predecessors, (2781), 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) [2023-09-01 08:34:53,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:53,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:34:53,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:00,831 INFO L130 PetriNetUnfolder]: 1833/3401 cut-off events. [2023-09-01 08:35:00,832 INFO L131 PetriNetUnfolder]: For 141512/141512 co-relation queries the response was YES. [2023-09-01 08:35:00,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 3401 events. 1833/3401 cut-off events. For 141512/141512 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22152 event pairs, 254 based on Foata normal form. 22/3423 useless extension candidates. Maximal degree in co-relation 29646. Up to 2382 conditions per place. [2023-09-01 08:35:00,874 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 355 selfloop transitions, 170 changer transitions 16/541 dead transitions. [2023-09-01 08:35:00,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 541 transitions, 10804 flow [2023-09-01 08:35:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 08:35:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 08:35:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3406 transitions. [2023-09-01 08:35:00,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2762368207623682 [2023-09-01 08:35:00,879 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3406 transitions. [2023-09-01 08:35:00,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3406 transitions. [2023-09-01 08:35:00,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:00,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3406 transitions. [2023-09-01 08:35:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 75.68888888888888) internal successors, (3406), 45 states have internal predecessors, (3406), 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) [2023-09-01 08:35:00,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:35:00,894 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 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) [2023-09-01 08:35:00,895 INFO L175 Difference]: Start difference. First operand has 346 places, 594 transitions, 11138 flow. Second operand 45 states and 3406 transitions. [2023-09-01 08:35:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 541 transitions, 10804 flow [2023-09-01 08:35:01,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 541 transitions, 10195 flow, removed 251 selfloop flow, removed 39 redundant places. [2023-09-01 08:35:01,459 INFO L231 Difference]: Finished difference. Result has 337 places, 461 transitions, 9322 flow [2023-09-01 08:35:01,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9322, PETRI_PLACES=337, PETRI_TRANSITIONS=461} [2023-09-01 08:35:01,460 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 309 predicate places. [2023-09-01 08:35:01,460 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 461 transitions, 9322 flow [2023-09-01 08:35:01,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.1842105263158) internal successors, (2781), 38 states have internal predecessors, (2781), 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) [2023-09-01 08:35:01,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:01,460 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:01,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:01,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:01,661 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:01,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1322007082, now seen corresponding path program 9 times [2023-09-01 08:35:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:01,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531038272] [2023-09-01 08:35:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:02,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531038272] [2023-09-01 08:35:02,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531038272] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545879557] [2023-09-01 08:35:02,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:35:02,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:02,288 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:02,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:35:02,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:35:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 08:35:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:35:02,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:03,082 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-09-01 08:35:03,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 231 treesize of output 186 [2023-09-01 08:35:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:35:03,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545879557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:03,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:03,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2023-09-01 08:35:03,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098808944] [2023-09-01 08:35:03,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:03,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:35:03,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:35:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-09-01 08:35:04,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-09-01 08:35:04,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 461 transitions, 9322 flow. Second operand has 27 states, 27 states have (on average 94.51851851851852) internal successors, (2552), 27 states have internal predecessors, (2552), 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) [2023-09-01 08:35:04,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:04,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-09-01 08:35:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:06,395 INFO L130 PetriNetUnfolder]: 2043/3799 cut-off events. [2023-09-01 08:35:06,395 INFO L131 PetriNetUnfolder]: For 170481/170481 co-relation queries the response was YES. [2023-09-01 08:35:06,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33878 conditions, 3799 events. 2043/3799 cut-off events. For 170481/170481 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25658 event pairs, 264 based on Foata normal form. 36/3835 useless extension candidates. Maximal degree in co-relation 33763. Up to 2279 conditions per place. [2023-09-01 08:35:06,432 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 454 selfloop transitions, 143 changer transitions 12/609 dead transitions. [2023-09-01 08:35:06,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 609 transitions, 12884 flow [2023-09-01 08:35:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 08:35:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 08:35:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3786 transitions. [2023-09-01 08:35:06,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35429533969679955 [2023-09-01 08:35:06,437 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3786 transitions. [2023-09-01 08:35:06,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3786 transitions. [2023-09-01 08:35:06,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:06,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3786 transitions. [2023-09-01 08:35:06,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 97.07692307692308) internal successors, (3786), 39 states have internal predecessors, (3786), 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) [2023-09-01 08:35:06,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 274.0) internal successors, (10960), 40 states have internal predecessors, (10960), 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) [2023-09-01 08:35:06,450 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 274.0) internal successors, (10960), 40 states have internal predecessors, (10960), 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) [2023-09-01 08:35:06,450 INFO L175 Difference]: Start difference. First operand has 337 places, 461 transitions, 9322 flow. Second operand 39 states and 3786 transitions. [2023-09-01 08:35:06,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 609 transitions, 12884 flow [2023-09-01 08:35:07,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 609 transitions, 12405 flow, removed 139 selfloop flow, removed 31 redundant places. [2023-09-01 08:35:07,031 INFO L231 Difference]: Finished difference. Result has 354 places, 501 transitions, 10625 flow [2023-09-01 08:35:07,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=8764, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10625, PETRI_PLACES=354, PETRI_TRANSITIONS=501} [2023-09-01 08:35:07,032 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 326 predicate places. [2023-09-01 08:35:07,032 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 501 transitions, 10625 flow [2023-09-01 08:35:07,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.51851851851852) internal successors, (2552), 27 states have internal predecessors, (2552), 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) [2023-09-01 08:35:07,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:07,033 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:07,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:07,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:07,238 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:07,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1322843152, now seen corresponding path program 10 times [2023-09-01 08:35:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3839925] [2023-09-01 08:35:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:08,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3839925] [2023-09-01 08:35:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3839925] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:08,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15063989] [2023-09-01 08:35:08,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:35:08,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:08,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:08,664 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:08,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:35:08,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:35:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 08:35:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:35:09,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:09,678 INFO L321 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2023-09-01 08:35:09,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 211 [2023-09-01 08:35:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:35:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15063989] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:10,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:10,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 26 [2023-09-01 08:35:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65689910] [2023-09-01 08:35:10,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:35:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:10,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:35:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-09-01 08:35:11,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 274 [2023-09-01 08:35:11,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 501 transitions, 10625 flow. Second operand has 28 states, 28 states have (on average 89.5) internal successors, (2506), 28 states have internal predecessors, (2506), 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) [2023-09-01 08:35:11,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:11,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 274 [2023-09-01 08:35:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:14,372 INFO L130 PetriNetUnfolder]: 2203/4095 cut-off events. [2023-09-01 08:35:14,372 INFO L131 PetriNetUnfolder]: For 208051/208051 co-relation queries the response was YES. [2023-09-01 08:35:14,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 4095 events. 2203/4095 cut-off events. For 208051/208051 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27887 event pairs, 230 based on Foata normal form. 48/4143 useless extension candidates. Maximal degree in co-relation 37658. Up to 2173 conditions per place. [2023-09-01 08:35:14,425 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 432 selfloop transitions, 177 changer transitions 10/619 dead transitions. [2023-09-01 08:35:14,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 619 transitions, 13914 flow [2023-09-01 08:35:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 08:35:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 08:35:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3129 transitions. [2023-09-01 08:35:14,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33587376556462 [2023-09-01 08:35:14,428 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3129 transitions. [2023-09-01 08:35:14,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3129 transitions. [2023-09-01 08:35:14,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:14,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3129 transitions. [2023-09-01 08:35:14,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 92.02941176470588) internal successors, (3129), 34 states have internal predecessors, (3129), 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) [2023-09-01 08:35:14,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 274.0) internal successors, (9590), 35 states have internal predecessors, (9590), 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) [2023-09-01 08:35:14,440 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 274.0) internal successors, (9590), 35 states have internal predecessors, (9590), 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) [2023-09-01 08:35:14,440 INFO L175 Difference]: Start difference. First operand has 354 places, 501 transitions, 10625 flow. Second operand 34 states and 3129 transitions. [2023-09-01 08:35:14,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 619 transitions, 13914 flow [2023-09-01 08:35:15,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 619 transitions, 12980 flow, removed 441 selfloop flow, removed 18 redundant places. [2023-09-01 08:35:15,353 INFO L231 Difference]: Finished difference. Result has 376 places, 525 transitions, 11161 flow [2023-09-01 08:35:15,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11161, PETRI_PLACES=376, PETRI_TRANSITIONS=525} [2023-09-01 08:35:15,354 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 348 predicate places. [2023-09-01 08:35:15,354 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 525 transitions, 11161 flow [2023-09-01 08:35:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.5) internal successors, (2506), 28 states have internal predecessors, (2506), 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) [2023-09-01 08:35:15,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:15,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:15,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:15,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 08:35:15,555 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:15,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1941534559, now seen corresponding path program 7 times [2023-09-01 08:35:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:15,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008311041] [2023-09-01 08:35:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:35:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:15,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008311041] [2023-09-01 08:35:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008311041] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413714420] [2023-09-01 08:35:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:35:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:15,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:15,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:35:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 08:35:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:16,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:16,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 140 [2023-09-01 08:35:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:35:16,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:16,975 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-09-01 08:35:16,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 171 [2023-09-01 08:35:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:35:17,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413714420] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:17,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:17,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-09-01 08:35:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868527799] [2023-09-01 08:35:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:35:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:35:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-09-01 08:35:17,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 274 [2023-09-01 08:35:17,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 525 transitions, 11161 flow. Second operand has 25 states, 25 states have (on average 97.72) internal successors, (2443), 25 states have internal predecessors, (2443), 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) [2023-09-01 08:35:17,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:17,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 274 [2023-09-01 08:35:17,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:19,757 INFO L130 PetriNetUnfolder]: 2701/4973 cut-off events. [2023-09-01 08:35:19,757 INFO L131 PetriNetUnfolder]: For 254532/254532 co-relation queries the response was YES. [2023-09-01 08:35:19,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47492 conditions, 4973 events. 2701/4973 cut-off events. For 254532/254532 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34892 event pairs, 316 based on Foata normal form. 148/5121 useless extension candidates. Maximal degree in co-relation 47366. Up to 1837 conditions per place. [2023-09-01 08:35:19,937 INFO L137 encePairwiseOnDemand]: 267/274 looper letters, 286 selfloop transitions, 354 changer transitions 34/674 dead transitions. [2023-09-01 08:35:19,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 674 transitions, 16059 flow [2023-09-01 08:35:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 08:35:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 08:35:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3315 transitions. [2023-09-01 08:35:19,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3666224286662243 [2023-09-01 08:35:19,940 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3315 transitions. [2023-09-01 08:35:19,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3315 transitions. [2023-09-01 08:35:19,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:19,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3315 transitions. [2023-09-01 08:35:19,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 100.45454545454545) internal successors, (3315), 33 states have internal predecessors, (3315), 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) [2023-09-01 08:35:19,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 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) [2023-09-01 08:35:19,952 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 274.0) internal successors, (9316), 34 states have internal predecessors, (9316), 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) [2023-09-01 08:35:19,952 INFO L175 Difference]: Start difference. First operand has 376 places, 525 transitions, 11161 flow. Second operand 33 states and 3315 transitions. [2023-09-01 08:35:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 674 transitions, 16059 flow [2023-09-01 08:35:20,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 674 transitions, 15239 flow, removed 248 selfloop flow, removed 39 redundant places. [2023-09-01 08:35:20,773 INFO L231 Difference]: Finished difference. Result has 365 places, 558 transitions, 12824 flow [2023-09-01 08:35:20,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=9138, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=12824, PETRI_PLACES=365, PETRI_TRANSITIONS=558} [2023-09-01 08:35:20,774 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 337 predicate places. [2023-09-01 08:35:20,774 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 558 transitions, 12824 flow [2023-09-01 08:35:20,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.72) internal successors, (2443), 25 states have internal predecessors, (2443), 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) [2023-09-01 08:35:20,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:20,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:20,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 08:35:20,975 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:20,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -919072747, now seen corresponding path program 11 times [2023-09-01 08:35:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991726797] [2023-09-01 08:35:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:21,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991726797] [2023-09-01 08:35:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991726797] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487981298] [2023-09-01 08:35:21,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:35:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:21,757 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:21,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:35:21,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:35:21,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 08:35:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:35:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:22,829 INFO L321 Elim1Store]: treesize reduction 82, result has 20.4 percent of original size [2023-09-01 08:35:22,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 289 treesize of output 190 [2023-09-01 08:35:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:35:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487981298] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:23,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:23,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2023-09-01 08:35:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320893886] [2023-09-01 08:35:23,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 08:35:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 08:35:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-09-01 08:35:24,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-09-01 08:35:24,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 558 transitions, 12824 flow. Second operand has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 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) [2023-09-01 08:35:24,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:24,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-09-01 08:35:24,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:29,007 INFO L130 PetriNetUnfolder]: 3381/6137 cut-off events. [2023-09-01 08:35:29,007 INFO L131 PetriNetUnfolder]: For 387251/387251 co-relation queries the response was YES. [2023-09-01 08:35:29,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63451 conditions, 6137 events. 3381/6137 cut-off events. For 387251/387251 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 43768 event pairs, 190 based on Foata normal form. 204/6341 useless extension candidates. Maximal degree in co-relation 63327. Up to 2405 conditions per place. [2023-09-01 08:35:29,084 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 386 selfloop transitions, 445 changer transitions 17/848 dead transitions. [2023-09-01 08:35:29,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 848 transitions, 20825 flow [2023-09-01 08:35:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 08:35:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 08:35:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4563 transitions. [2023-09-01 08:35:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543252057772946 [2023-09-01 08:35:29,088 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4563 transitions. [2023-09-01 08:35:29,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4563 transitions. [2023-09-01 08:35:29,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:29,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4563 transitions. [2023-09-01 08:35:29,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 97.08510638297872) internal successors, (4563), 47 states have internal predecessors, (4563), 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) [2023-09-01 08:35:29,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 274.0) internal successors, (13152), 48 states have internal predecessors, (13152), 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) [2023-09-01 08:35:29,101 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 274.0) internal successors, (13152), 48 states have internal predecessors, (13152), 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) [2023-09-01 08:35:29,101 INFO L175 Difference]: Start difference. First operand has 365 places, 558 transitions, 12824 flow. Second operand 47 states and 4563 transitions. [2023-09-01 08:35:29,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 848 transitions, 20825 flow [2023-09-01 08:35:30,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 848 transitions, 19436 flow, removed 635 selfloop flow, removed 22 redundant places. [2023-09-01 08:35:30,588 INFO L231 Difference]: Finished difference. Result has 390 places, 698 transitions, 17475 flow [2023-09-01 08:35:30,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=11719, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=17475, PETRI_PLACES=390, PETRI_TRANSITIONS=698} [2023-09-01 08:35:30,588 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 362 predicate places. [2023-09-01 08:35:30,589 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 698 transitions, 17475 flow [2023-09-01 08:35:30,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 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) [2023-09-01 08:35:30,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:30,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:30,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:35:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 08:35:30,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:30,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -893154576, now seen corresponding path program 8 times [2023-09-01 08:35:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:30,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846755715] [2023-09-01 08:35:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846755715] [2023-09-01 08:35:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846755715] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621245163] [2023-09-01 08:35:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:35:32,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:32,781 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:35:32,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:35:32,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 08:35:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:35:33,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:33,832 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:35:33,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 242 [2023-09-01 08:35:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:35:36,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621245163] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:36,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:36,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2023-09-01 08:35:36,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868193560] [2023-09-01 08:35:36,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:36,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 08:35:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 08:35:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-09-01 08:35:37,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-09-01 08:35:37,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 698 transitions, 17475 flow. Second operand has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 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) [2023-09-01 08:35:37,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:37,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-09-01 08:35:37,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:42,077 INFO L130 PetriNetUnfolder]: 3847/6859 cut-off events. [2023-09-01 08:35:42,078 INFO L131 PetriNetUnfolder]: For 561664/561664 co-relation queries the response was YES. [2023-09-01 08:35:42,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75417 conditions, 6859 events. 3847/6859 cut-off events. For 561664/561664 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 48520 event pairs, 276 based on Foata normal form. 256/7115 useless extension candidates. Maximal degree in co-relation 75287. Up to 2777 conditions per place. [2023-09-01 08:35:42,163 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 540 selfloop transitions, 370 changer transitions 10/920 dead transitions. [2023-09-01 08:35:42,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 920 transitions, 24436 flow [2023-09-01 08:35:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 08:35:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 08:35:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3405 transitions. [2023-09-01 08:35:42,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550573514077164 [2023-09-01 08:35:42,167 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3405 transitions. [2023-09-01 08:35:42,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3405 transitions. [2023-09-01 08:35:42,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:42,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3405 transitions. [2023-09-01 08:35:42,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 97.28571428571429) internal successors, (3405), 35 states have internal predecessors, (3405), 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) [2023-09-01 08:35:42,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 274.0) internal successors, (9864), 36 states have internal predecessors, (9864), 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) [2023-09-01 08:35:42,178 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 274.0) internal successors, (9864), 36 states have internal predecessors, (9864), 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) [2023-09-01 08:35:42,178 INFO L175 Difference]: Start difference. First operand has 390 places, 698 transitions, 17475 flow. Second operand 35 states and 3405 transitions. [2023-09-01 08:35:42,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 920 transitions, 24436 flow [2023-09-01 08:35:44,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 920 transitions, 21949 flow, removed 1089 selfloop flow, removed 31 redundant places. [2023-09-01 08:35:44,307 INFO L231 Difference]: Finished difference. Result has 391 places, 768 transitions, 18914 flow [2023-09-01 08:35:44,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=14773, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18914, PETRI_PLACES=391, PETRI_TRANSITIONS=768} [2023-09-01 08:35:44,308 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 363 predicate places. [2023-09-01 08:35:44,308 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 768 transitions, 18914 flow [2023-09-01 08:35:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 94.45161290322581) internal successors, (2928), 31 states have internal predecessors, (2928), 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) [2023-09-01 08:35:44,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:44,309 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:44,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 08:35:44,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:44,514 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:35:44,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1917986524, now seen corresponding path program 12 times [2023-09-01 08:35:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029578787] [2023-09-01 08:35:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:44,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029578787] [2023-09-01 08:35:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029578787] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:45,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812591003] [2023-09-01 08:35:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:35:45,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:45,152 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:45,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:35:45,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 08:35:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:35:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 08:35:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:45,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:35:45,463 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:35:45,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-09-01 08:35:45,553 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:35:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 08:35:45,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:45,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:35:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:45,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:35:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:46,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:48,240 INFO L321 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-09-01 08:35:48,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 313 treesize of output 181 [2023-09-01 08:35:48,434 INFO L321 Elim1Store]: treesize reduction 36, result has 82.4 percent of original size [2023-09-01 08:35:48,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 497 treesize of output 588 [2023-09-01 08:35:48,563 INFO L321 Elim1Store]: treesize reduction 44, result has 48.2 percent of original size [2023-09-01 08:35:48,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 398 treesize of output 344 [2023-09-01 08:35:48,658 INFO L321 Elim1Store]: treesize reduction 44, result has 48.2 percent of original size [2023-09-01 08:35:48,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 248 treesize of output 241 [2023-09-01 08:36:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:36:34,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812591003] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:36:34,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:36:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-09-01 08:36:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300233347] [2023-09-01 08:36:34,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:36:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 08:36:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:36:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 08:36:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1519, Unknown=7, NotChecked=0, Total=1806 [2023-09-01 08:36:35,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:36:35,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 768 transitions, 18914 flow. Second operand has 43 states, 43 states have (on average 73.18604651162791) internal successors, (3147), 43 states have internal predecessors, (3147), 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) [2023-09-01 08:36:35,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:36:35,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:36:35,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:37:10,531 INFO L130 PetriNetUnfolder]: 8337/14817 cut-off events. [2023-09-01 08:37:10,531 INFO L131 PetriNetUnfolder]: For 1280957/1280957 co-relation queries the response was YES. [2023-09-01 08:37:10,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173809 conditions, 14817 events. 8337/14817 cut-off events. For 1280957/1280957 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 113268 event pairs, 692 based on Foata normal form. 462/15279 useless extension candidates. Maximal degree in co-relation 173682. Up to 5638 conditions per place. [2023-09-01 08:37:10,745 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 1001 selfloop transitions, 1055 changer transitions 23/2079 dead transitions. [2023-09-01 08:37:10,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 2079 transitions, 57963 flow [2023-09-01 08:37:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-09-01 08:37:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2023-09-01 08:37:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 10831 transitions. [2023-09-01 08:37:10,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27837462732599977 [2023-09-01 08:37:10,756 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 10831 transitions. [2023-09-01 08:37:10,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 10831 transitions. [2023-09-01 08:37:10,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:37:10,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 10831 transitions. [2023-09-01 08:37:10,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 76.27464788732394) internal successors, (10831), 142 states have internal predecessors, (10831), 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) [2023-09-01 08:37:10,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 274.0) internal successors, (39182), 143 states have internal predecessors, (39182), 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) [2023-09-01 08:37:10,800 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 274.0) internal successors, (39182), 143 states have internal predecessors, (39182), 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) [2023-09-01 08:37:10,801 INFO L175 Difference]: Start difference. First operand has 391 places, 768 transitions, 18914 flow. Second operand 142 states and 10831 transitions. [2023-09-01 08:37:10,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 2079 transitions, 57963 flow [2023-09-01 08:37:17,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 2079 transitions, 54739 flow, removed 1469 selfloop flow, removed 26 redundant places. [2023-09-01 08:37:17,276 INFO L231 Difference]: Finished difference. Result has 538 places, 1805 transitions, 53747 flow [2023-09-01 08:37:17,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=17757, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=53747, PETRI_PLACES=538, PETRI_TRANSITIONS=1805} [2023-09-01 08:37:17,277 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 510 predicate places. [2023-09-01 08:37:17,278 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1805 transitions, 53747 flow [2023-09-01 08:37:17,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 73.18604651162791) internal successors, (3147), 43 states have internal predecessors, (3147), 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) [2023-09-01 08:37:17,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:37:17,278 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:37:17,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 08:37:17,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 08:37:17,480 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:37:17,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:37:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1534402994, now seen corresponding path program 13 times [2023-09-01 08:37:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:37:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160463263] [2023-09-01 08:37:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:37:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:37:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:37:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:37:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160463263] [2023-09-01 08:37:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160463263] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:37:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137495291] [2023-09-01 08:37:18,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:37:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:37:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:37:18,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:37:18,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 08:37:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:37:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 08:37:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:37:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:19,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:37:20,868 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-09-01 08:37:20,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 349 [2023-09-01 08:37:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137495291] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:37:24,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:37:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-09-01 08:37:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202576912] [2023-09-01 08:37:24,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:37:24,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 08:37:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:37:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 08:37:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1542, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 08:37:26,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 274 [2023-09-01 08:37:26,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1805 transitions, 53747 flow. Second operand has 44 states, 44 states have (on average 92.22727272727273) internal successors, (4058), 44 states have internal predecessors, (4058), 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) [2023-09-01 08:37:26,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:37:26,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 274 [2023-09-01 08:37:26,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:37:54,252 INFO L130 PetriNetUnfolder]: 13723/24127 cut-off events. [2023-09-01 08:37:54,253 INFO L131 PetriNetUnfolder]: For 2119210/2119210 co-relation queries the response was YES. [2023-09-01 08:37:54,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293534 conditions, 24127 events. 13723/24127 cut-off events. For 2119210/2119210 co-relation queries the response was YES. Maximal size of possible extension queue 1385. Compared 199329 event pairs, 798 based on Foata normal form. 544/24671 useless extension candidates. Maximal degree in co-relation 293375. Up to 8861 conditions per place. [2023-09-01 08:37:54,743 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1735 selfloop transitions, 1589 changer transitions 10/3334 dead transitions. [2023-09-01 08:37:54,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 3334 transitions, 104226 flow [2023-09-01 08:37:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-09-01 08:37:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-09-01 08:37:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9280 transitions. [2023-09-01 08:37:54,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34916096019264053 [2023-09-01 08:37:54,749 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9280 transitions. [2023-09-01 08:37:54,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9280 transitions. [2023-09-01 08:37:54,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:37:54,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9280 transitions. [2023-09-01 08:37:54,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 95.6701030927835) internal successors, (9280), 97 states have internal predecessors, (9280), 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) [2023-09-01 08:37:54,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 274.0) internal successors, (26852), 98 states have internal predecessors, (26852), 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) [2023-09-01 08:37:54,767 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 274.0) internal successors, (26852), 98 states have internal predecessors, (26852), 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) [2023-09-01 08:37:54,768 INFO L175 Difference]: Start difference. First operand has 538 places, 1805 transitions, 53747 flow. Second operand 97 states and 9280 transitions. [2023-09-01 08:37:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 3334 transitions, 104226 flow [2023-09-01 08:38:18,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 3334 transitions, 85323 flow, removed 9396 selfloop flow, removed 33 redundant places. [2023-09-01 08:38:18,112 INFO L231 Difference]: Finished difference. Result has 661 places, 2953 transitions, 80280 flow [2023-09-01 08:38:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=39387, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=80280, PETRI_PLACES=661, PETRI_TRANSITIONS=2953} [2023-09-01 08:38:18,115 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 633 predicate places. [2023-09-01 08:38:18,115 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 2953 transitions, 80280 flow [2023-09-01 08:38:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 92.22727272727273) internal successors, (4058), 44 states have internal predecessors, (4058), 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) [2023-09-01 08:38:18,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:38:18,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:38:18,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 08:38:18,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:38:18,323 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:38:18,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:38:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1560294194, now seen corresponding path program 14 times [2023-09-01 08:38:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:38:18,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600227124] [2023-09-01 08:38:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:38:18,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:38:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:38:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:38:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:38:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600227124] [2023-09-01 08:38:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600227124] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:38:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109059961] [2023-09-01 08:38:19,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:38:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:38:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:38:19,143 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:38:19,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 08:38:19,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:38:19,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:38:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 08:38:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:38:19,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:38:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:38:19,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:38:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:38:19,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:38:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:38:20,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:38:21,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:38:21,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 160 [2023-09-01 08:38:22,195 INFO L321 Elim1Store]: treesize reduction 60, result has 73.8 percent of original size [2023-09-01 08:38:22,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 511 treesize of output 601 [2023-09-01 08:38:22,322 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-09-01 08:38:22,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 428 treesize of output 412 [2023-09-01 08:38:22,444 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-09-01 08:38:22,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 287 treesize of output 325 [2023-09-01 08:38:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:38:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109059961] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:38:57,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:38:57,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2023-09-01 08:38:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810425552] [2023-09-01 08:38:57,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:38:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 08:38:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:38:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 08:38:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1647, Unknown=5, NotChecked=0, Total=2070 [2023-09-01 08:38:59,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:38:59,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 2953 transitions, 80280 flow. Second operand has 46 states, 46 states have (on average 73.17391304347827) internal successors, (3366), 46 states have internal predecessors, (3366), 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) [2023-09-01 08:38:59,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:38:59,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:38:59,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:39:04,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:36,884 INFO L130 PetriNetUnfolder]: 12955/22831 cut-off events. [2023-09-01 08:39:36,884 INFO L131 PetriNetUnfolder]: For 1797480/1797480 co-relation queries the response was YES. [2023-09-01 08:39:37,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258693 conditions, 22831 events. 12955/22831 cut-off events. For 1797480/1797480 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 184940 event pairs, 1263 based on Foata normal form. 86/22917 useless extension candidates. Maximal degree in co-relation 258475. Up to 15136 conditions per place. [2023-09-01 08:39:37,432 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 2404 selfloop transitions, 519 changer transitions 61/2984 dead transitions. [2023-09-01 08:39:37,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2984 transitions, 84266 flow [2023-09-01 08:39:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-09-01 08:39:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-09-01 08:39:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6114 transitions. [2023-09-01 08:39:37,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27547985942146525 [2023-09-01 08:39:37,437 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6114 transitions. [2023-09-01 08:39:37,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6114 transitions. [2023-09-01 08:39:37,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:39:37,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6114 transitions. [2023-09-01 08:39:37,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 75.48148148148148) internal successors, (6114), 81 states have internal predecessors, (6114), 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) [2023-09-01 08:39:37,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 274.0) internal successors, (22468), 82 states have internal predecessors, (22468), 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) [2023-09-01 08:39:37,452 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 274.0) internal successors, (22468), 82 states have internal predecessors, (22468), 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) [2023-09-01 08:39:37,452 INFO L175 Difference]: Start difference. First operand has 661 places, 2953 transitions, 80280 flow. Second operand 81 states and 6114 transitions. [2023-09-01 08:39:37,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2984 transitions, 84266 flow [2023-09-01 08:40:04,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2984 transitions, 73739 flow, removed 5186 selfloop flow, removed 21 redundant places. [2023-09-01 08:40:04,213 INFO L231 Difference]: Finished difference. Result has 733 places, 2829 transitions, 68397 flow [2023-09-01 08:40:04,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=64934, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=68397, PETRI_PLACES=733, PETRI_TRANSITIONS=2829} [2023-09-01 08:40:04,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 705 predicate places. [2023-09-01 08:40:04,216 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 2829 transitions, 68397 flow [2023-09-01 08:40:04,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 73.17391304347827) internal successors, (3366), 46 states have internal predecessors, (3366), 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) [2023-09-01 08:40:04,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:40:04,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:40:04,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 08:40:04,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 08:40:04,425 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:40:04,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:40:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 127208680, now seen corresponding path program 9 times [2023-09-01 08:40:04,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:40:04,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243953345] [2023-09-01 08:40:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:40:04,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:40:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:40:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:40:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:40:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243953345] [2023-09-01 08:40:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243953345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:40:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74335201] [2023-09-01 08:40:04,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:40:04,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:40:04,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:40:04,631 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:40:04,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 08:40:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 08:40:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:40:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 08:40:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:40:05,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:40:05,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 148 [2023-09-01 08:40:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:40:05,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:40:06,133 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-09-01 08:40:06,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 181 [2023-09-01 08:40:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:40:06,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74335201] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:40:06,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:40:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 08:40:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576280690] [2023-09-01 08:40:06,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:40:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:40:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:40:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:40:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2023-09-01 08:40:06,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 274 [2023-09-01 08:40:06,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 2829 transitions, 68397 flow. Second operand has 30 states, 30 states have (on average 98.4) internal successors, (2952), 30 states have internal predecessors, (2952), 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) [2023-09-01 08:40:06,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:40:06,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 274 [2023-09-01 08:40:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:40:13,990 INFO L130 PetriNetUnfolder]: 3805/6821 cut-off events. [2023-09-01 08:40:13,990 INFO L131 PetriNetUnfolder]: For 480092/480092 co-relation queries the response was YES. [2023-09-01 08:40:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77324 conditions, 6821 events. 3805/6821 cut-off events. For 480092/480092 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 47215 event pairs, 1956 based on Foata normal form. 90/6911 useless extension candidates. Maximal degree in co-relation 77097. Up to 6070 conditions per place. [2023-09-01 08:40:14,137 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 720 selfloop transitions, 23 changer transitions 84/827 dead transitions. [2023-09-01 08:40:14,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 827 transitions, 22848 flow [2023-09-01 08:40:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 08:40:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 08:40:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2226 transitions. [2023-09-01 08:40:14,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3692767086927671 [2023-09-01 08:40:14,139 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2226 transitions. [2023-09-01 08:40:14,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2226 transitions. [2023-09-01 08:40:14,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:40:14,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2226 transitions. [2023-09-01 08:40:14,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 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) [2023-09-01 08:40:14,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 274.0) internal successors, (6302), 23 states have internal predecessors, (6302), 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) [2023-09-01 08:40:14,144 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 274.0) internal successors, (6302), 23 states have internal predecessors, (6302), 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) [2023-09-01 08:40:14,144 INFO L175 Difference]: Start difference. First operand has 733 places, 2829 transitions, 68397 flow. Second operand 22 states and 2226 transitions. [2023-09-01 08:40:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 827 transitions, 22848 flow [2023-09-01 08:40:18,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 827 transitions, 20456 flow, removed 656 selfloop flow, removed 145 redundant places. [2023-09-01 08:40:18,053 INFO L231 Difference]: Finished difference. Result has 462 places, 734 transitions, 17564 flow [2023-09-01 08:40:18,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=18515, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=17564, PETRI_PLACES=462, PETRI_TRANSITIONS=734} [2023-09-01 08:40:18,054 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 434 predicate places. [2023-09-01 08:40:18,054 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 734 transitions, 17564 flow [2023-09-01 08:40:18,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.4) internal successors, (2952), 30 states have internal predecessors, (2952), 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) [2023-09-01 08:40:18,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:40:18,055 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:40:18,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 08:40:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:40:18,256 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:40:18,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:40:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1560321165, now seen corresponding path program 10 times [2023-09-01 08:40:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:40:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444802547] [2023-09-01 08:40:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:40:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:40:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:40:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:40:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:40:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444802547] [2023-09-01 08:40:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444802547] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:40:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529247081] [2023-09-01 08:40:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:40:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:40:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:40:19,177 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:40:19,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 08:40:19,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:40:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:40:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 08:40:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:40:19,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:40:19,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-09-01 08:40:19,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-09-01 08:40:19,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-09-01 08:40:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:40:19,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-09-01 08:40:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:40:19,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-09-01 08:40:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:40:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:40:22,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:40:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 435 treesize of output 198 [2023-09-01 08:40:22,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:40:22,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 517 treesize of output 734 [2023-09-01 08:40:22,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:40:22,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 468 [2023-09-01 08:40:22,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:40:22,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 383 [2023-09-01 08:45:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:45:20,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529247081] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:45:20,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:45:20,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2023-09-01 08:45:20,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952144854] [2023-09-01 08:45:20,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:45:20,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 08:45:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:45:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 08:45:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1640, Unknown=8, NotChecked=0, Total=1980 [2023-09-01 08:45:22,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 274 [2023-09-01 08:45:22,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 734 transitions, 17564 flow. Second operand has 45 states, 45 states have (on average 73.2) internal successors, (3294), 45 states have internal predecessors, (3294), 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) [2023-09-01 08:45:22,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:45:22,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 274 [2023-09-01 08:45:22,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15