./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:22:39,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:22:39,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:22:39,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:22:39,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:22:39,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:22:39,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:22:39,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:22:39,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:22:39,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:22:39,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:22:39,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:22:39,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:22:39,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:22:39,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:22:39,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:22:39,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:22:39,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:22:39,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:22:39,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:22:39,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:22:39,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:22:39,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:22:39,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:22:39,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:22:39,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:22:39,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:22:39,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:22:39,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:22:39,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:22:39,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:22:39,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:22:39,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:22:39,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:22:39,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:22:39,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:22:39,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:22:39,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:22:39,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:22:39,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:22:39,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:22:39,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:22:39,597 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:22:39,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:22:39,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:22:39,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:22:39,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:22:39,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:22:39,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:22:39,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:22:39,600 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:22:39,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:22:39,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:22:39,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:22:39,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:22:39,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:22:39,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:22:39,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:22:39,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:22:39,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:22:39,604 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:22:39,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:22:39,605 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:22:39,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:22:39,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:22:39,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:22:39,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:22:39,831 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:22:39,831 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:22:39,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 15:22:40,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:22:40,917 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:22:40,917 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 15:22:40,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592334b19/f2a9cdaef5a742e3a57b6151acf3f4af/FLAGdc375900e [2023-08-30 15:22:40,958 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592334b19/f2a9cdaef5a742e3a57b6151acf3f4af [2023-08-30 15:22:40,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:22:40,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:22:40,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:22:40,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:22:40,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:22:40,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:22:40" (1/1) ... [2023-08-30 15:22:40,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69eeab0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:40, skipping insertion in model container [2023-08-30 15:22:40,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:22:40" (1/1) ... [2023-08-30 15:22:40,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:22:40,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:22:41,142 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-channel-sum.wvr.c[2947,2960] [2023-08-30 15:22:41,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:22:41,160 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:22:41,197 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-channel-sum.wvr.c[2947,2960] [2023-08-30 15:22:41,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:22:41,209 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:22:41,210 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:22:41,214 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:22:41,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41 WrapperNode [2023-08-30 15:22:41,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:22:41,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:22:41,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:22:41,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:22:41,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,243 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 165 [2023-08-30 15:22:41,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:22:41,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:22:41,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:22:41,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:22:41,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,266 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:22:41,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:22:41,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:22:41,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:22:41,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (1/1) ... [2023-08-30 15:22:41,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:22:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:41,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:22:41,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:22:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:22:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:22:41,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:22:41,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:22:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:22:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:22:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:22:41,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:22:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:22:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:22:41,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:22:41,471 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:22:41,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:22:41,705 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:22:41,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:22:41,767 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:22:41,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:22:41 BoogieIcfgContainer [2023-08-30 15:22:41,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:22:41,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:22:41,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:22:41,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:22:41,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:22:40" (1/3) ... [2023-08-30 15:22:41,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bbaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:22:41, skipping insertion in model container [2023-08-30 15:22:41,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:22:41" (2/3) ... [2023-08-30 15:22:41,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bbaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:22:41, skipping insertion in model container [2023-08-30 15:22:41,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:22:41" (3/3) ... [2023-08-30 15:22:41,774 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-30 15:22:41,779 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:22:41,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:22:41,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 15:22:41,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:22:41,880 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:22:41,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 149 transitions, 314 flow [2023-08-30 15:22:41,978 INFO L130 PetriNetUnfolder]: 11/147 cut-off events. [2023-08-30 15:22:41,978 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:22:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 11/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 15:22:41,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 149 transitions, 314 flow [2023-08-30 15:22:41,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 131 transitions, 271 flow [2023-08-30 15:22:41,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:22:41,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 131 transitions, 271 flow [2023-08-30 15:22:42,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 131 transitions, 271 flow [2023-08-30 15:22:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 271 flow [2023-08-30 15:22:42,039 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2023-08-30 15:22:42,040 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:22:42,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 131 events. 10/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 15:22:42,044 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-08-30 15:22:46,487 INFO L134 LiptonReduction]: Checked pairs total: 2520 [2023-08-30 15:22:46,487 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 15:22:46,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:22:46,500 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;@e2a5b30, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:22:46,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 15:22:46,501 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:22:46,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:22:46,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:46,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:22:46,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:46,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash 21084, now seen corresponding path program 1 times [2023-08-30 15:22:46,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:46,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629881021] [2023-08-30 15:22:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629881021] [2023-08-30 15:22:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629881021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:22:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:22:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142007785] [2023-08-30 15:22:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:22:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:22:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:22:46,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 15:22:46,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:46,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:46,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 15:22:46,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:46,798 INFO L130 PetriNetUnfolder]: 383/577 cut-off events. [2023-08-30 15:22:46,799 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 15:22:46,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 577 events. 383/577 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2480 event pairs, 178 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 523. Up to 284 conditions per place. [2023-08-30 15:22:46,824 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 15:22:46,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-08-30 15:22:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:22:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:22:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-30 15:22:46,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581976112920738 [2023-08-30 15:22:46,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-30 15:22:46,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-30 15:22:46,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:46,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-30 15:22:46,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:46,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:46,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:46,857 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 422 transitions. [2023-08-30 15:22:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-08-30 15:22:46,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:22:46,863 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2023-08-30 15:22:46,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-30 15:22:46,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 15:22:46,869 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2023-08-30 15:22:46,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:46,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:46,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:22:46,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:22:46,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:46,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:46,874 INFO L85 PathProgramCache]: Analyzing trace with hash 655141, now seen corresponding path program 1 times [2023-08-30 15:22:46,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:46,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893070573] [2023-08-30 15:22:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:46,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893070573] [2023-08-30 15:22:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893070573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898569280] [2023-08-30 15:22:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:46,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:46,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:46,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:22:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:22:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:47,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:47,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898569280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:47,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:47,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:22:47,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158923001] [2023-08-30 15:22:47,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:47,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:22:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:22:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:22:47,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 15:22:47,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:47,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 15:22:47,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:47,408 INFO L130 PetriNetUnfolder]: 959/1441 cut-off events. [2023-08-30 15:22:47,409 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 15:22:47,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 1441 events. 959/1441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7307 event pairs, 445 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 2347. Up to 283 conditions per place. [2023-08-30 15:22:47,414 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 87 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2023-08-30 15:22:47,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 98 transitions, 432 flow [2023-08-30 15:22:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:22:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:22:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 974 transitions. [2023-08-30 15:22:47,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532340623545835 [2023-08-30 15:22:47,416 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 974 transitions. [2023-08-30 15:22:47,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 974 transitions. [2023-08-30 15:22:47,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:47,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 974 transitions. [2023-08-30 15:22:47,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,421 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,422 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 7 states and 974 transitions. [2023-08-30 15:22:47,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 98 transitions, 432 flow [2023-08-30 15:22:47,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 98 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:22:47,423 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 121 flow [2023-08-30 15:22:47,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 15:22:47,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 15:22:47,424 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 121 flow [2023-08-30 15:22:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:47,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 15:22:47,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:47,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:47,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 20310460, now seen corresponding path program 1 times [2023-08-30 15:22:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108762755] [2023-08-30 15:22:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:22:47,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:47,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108762755] [2023-08-30 15:22:47,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108762755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:47,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:22:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:22:47,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272092759] [2023-08-30 15:22:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:47,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:22:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:22:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:22:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-08-30 15:22:47,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:47,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-08-30 15:22:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:47,812 INFO L130 PetriNetUnfolder]: 956/1437 cut-off events. [2023-08-30 15:22:47,813 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 15:22:47,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 1437 events. 956/1437 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7387 event pairs, 445 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 1754. Up to 1402 conditions per place. [2023-08-30 15:22:47,817 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 15:22:47,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 142 flow [2023-08-30 15:22:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:22:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:22:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-30 15:22:47,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996742671009774 [2023-08-30 15:22:47,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-30 15:22:47,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-30 15:22:47,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:47,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-30 15:22:47,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,822 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 121 flow. Second operand 3 states and 396 transitions. [2023-08-30 15:22:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 142 flow [2023-08-30 15:22:47,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 134 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:22:47,823 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 88 flow [2023-08-30 15:22:47,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 15:22:47,824 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-30 15:22:47,824 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 88 flow [2023-08-30 15:22:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:47,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:22:47,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 15:22:47,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:47,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash 629234067, now seen corresponding path program 1 times [2023-08-30 15:22:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:47,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427198127] [2023-08-30 15:22:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:47,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427198127] [2023-08-30 15:22:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427198127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:47,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:22:47,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:22:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411222995] [2023-08-30 15:22:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:22:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:22:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:22:47,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 307 [2023-08-30 15:22:47,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:47,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:47,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 307 [2023-08-30 15:22:47,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:48,103 INFO L130 PetriNetUnfolder]: 786/1432 cut-off events. [2023-08-30 15:22:48,103 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 15:22:48,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2918 conditions, 1432 events. 786/1432 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8624 event pairs, 225 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2906. Up to 791 conditions per place. [2023-08-30 15:22:48,107 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 42 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2023-08-30 15:22:48,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 238 flow [2023-08-30 15:22:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:22:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:22:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2023-08-30 15:22:48,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254071661237785 [2023-08-30 15:22:48,109 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2023-08-30 15:22:48,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2023-08-30 15:22:48,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:48,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2023-08-30 15:22:48,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,113 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 88 flow. Second operand 5 states and 653 transitions. [2023-08-30 15:22:48,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 238 flow [2023-08-30 15:22:48,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:22:48,114 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 129 flow [2023-08-30 15:22:48,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 15:22:48,115 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-30 15:22:48,115 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 129 flow [2023-08-30 15:22:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:48,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:22:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:22:48,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:48,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1956435670, now seen corresponding path program 2 times [2023-08-30 15:22:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637584626] [2023-08-30 15:22:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637584626] [2023-08-30 15:22:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637584626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924905833] [2023-08-30 15:22:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:48,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:48,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:48,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:22:48,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:22:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:22:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:22:48,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:22:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924905833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:48,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:22:48,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:22:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915376946] [2023-08-30 15:22:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:22:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:22:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:22:48,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 15:22:48,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:48,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 15:22:48,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:48,372 INFO L130 PetriNetUnfolder]: 851/1456 cut-off events. [2023-08-30 15:22:48,373 INFO L131 PetriNetUnfolder]: For 633/703 co-relation queries the response was YES. [2023-08-30 15:22:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1456 events. 851/1456 cut-off events. For 633/703 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 8890 event pairs, 525 based on Foata normal form. 56/972 useless extension candidates. Maximal degree in co-relation 3850. Up to 1436 conditions per place. [2023-08-30 15:22:48,377 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 15:22:48,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 169 flow [2023-08-30 15:22:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:22:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:22:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-30 15:22:48,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43213897937024975 [2023-08-30 15:22:48,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-30 15:22:48,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-30 15:22:48,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:48,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-30 15:22:48,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,382 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 129 flow. Second operand 3 states and 398 transitions. [2023-08-30 15:22:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 169 flow [2023-08-30 15:22:48,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 157 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 15:22:48,384 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2023-08-30 15:22:48,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-30 15:22:48,384 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-30 15:22:48,384 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2023-08-30 15:22:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:48,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:48,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:48,589 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 [2023-08-30 15:22:48,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:48,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash -891104295, now seen corresponding path program 1 times [2023-08-30 15:22:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:48,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890405053] [2023-08-30 15:22:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:48,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:48,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890405053] [2023-08-30 15:22:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890405053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:48,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:22:48,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:22:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258828806] [2023-08-30 15:22:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:48,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:22:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:22:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:22:48,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 307 [2023-08-30 15:22:48,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:48,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 307 [2023-08-30 15:22:48,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:48,777 INFO L130 PetriNetUnfolder]: 690/1195 cut-off events. [2023-08-30 15:22:48,778 INFO L131 PetriNetUnfolder]: For 534/597 co-relation queries the response was YES. [2023-08-30 15:22:48,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1195 events. 690/1195 cut-off events. For 534/597 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 7111 event pairs, 429 based on Foata normal form. 59/822 useless extension candidates. Maximal degree in co-relation 3133. Up to 1150 conditions per place. [2023-08-30 15:22:48,781 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2023-08-30 15:22:48,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 199 flow [2023-08-30 15:22:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:22:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:22:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-30 15:22:48,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234527687296417 [2023-08-30 15:22:48,783 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-30 15:22:48,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-30 15:22:48,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:48,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-30 15:22:48,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,786 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,786 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 4 states and 520 transitions. [2023-08-30 15:22:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 199 flow [2023-08-30 15:22:48,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:22:48,787 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 124 flow [2023-08-30 15:22:48,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 15:22:48,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-30 15:22:48,788 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 124 flow [2023-08-30 15:22:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:48,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 15:22:48,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:48,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 689890302, now seen corresponding path program 1 times [2023-08-30 15:22:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:48,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596112260] [2023-08-30 15:22:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:48,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596112260] [2023-08-30 15:22:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596112260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:48,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203300465] [2023-08-30 15:22:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:48,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:48,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:48,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:22:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:22:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:22:48,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:22:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203300465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:22:48,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:22:48,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:22:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91089471] [2023-08-30 15:22:48,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:48,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:22:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:22:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:22:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-08-30 15:22:48,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:48,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-08-30 15:22:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:48,954 INFO L130 PetriNetUnfolder]: 309/554 cut-off events. [2023-08-30 15:22:48,954 INFO L131 PetriNetUnfolder]: For 548/580 co-relation queries the response was YES. [2023-08-30 15:22:48,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 554 events. 309/554 cut-off events. For 548/580 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2767 event pairs, 164 based on Foata normal form. 128/606 useless extension candidates. Maximal degree in co-relation 1557. Up to 538 conditions per place. [2023-08-30 15:22:48,955 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 17 selfloop transitions, 1 changer transitions 5/25 dead transitions. [2023-08-30 15:22:48,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 154 flow [2023-08-30 15:22:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:22:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:22:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 15:22:48,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43105320304017375 [2023-08-30 15:22:48,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 15:22:48,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 15:22:48,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:48,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 15:22:48,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,959 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 124 flow. Second operand 3 states and 397 transitions. [2023-08-30 15:22:48,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 154 flow [2023-08-30 15:22:48,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 144 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 15:22:48,961 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 83 flow [2023-08-30 15:22:48,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-30 15:22:48,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 15:22:48,961 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 83 flow [2023-08-30 15:22:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:48,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:48,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:48,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:49,166 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 [2023-08-30 15:22:49,166 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:49,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1559639799, now seen corresponding path program 1 times [2023-08-30 15:22:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:49,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376969049] [2023-08-30 15:22:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376969049] [2023-08-30 15:22:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376969049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:49,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684083821] [2023-08-30 15:22:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:49,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:49,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:49,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:22:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:22:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:50,012 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 [2023-08-30 15:22:50,047 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 [2023-08-30 15:22:50,074 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 [2023-08-30 15:22:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:50,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:50,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:50,796 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 62 treesize of output 50 [2023-08-30 15:22:50,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:50,805 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 148 treesize of output 140 [2023-08-30 15:22:50,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:50,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 101 treesize of output 97 [2023-08-30 15:22:50,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:50,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 120 treesize of output 104 [2023-08-30 15:22:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684083821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:51,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-30 15:22:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913706358] [2023-08-30 15:22:51,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:22:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:22:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=354, Unknown=2, NotChecked=0, Total=462 [2023-08-30 15:22:53,485 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] [2023-08-30 15:22:54,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 307 [2023-08-30 15:22:54,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 83 flow. Second operand has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:54,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:54,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 307 [2023-08-30 15:22:54,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:55,529 INFO L130 PetriNetUnfolder]: 353/606 cut-off events. [2023-08-30 15:22:55,530 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-30 15:22:55,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 606 events. 353/606 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2441 event pairs, 36 based on Foata normal form. 6/528 useless extension candidates. Maximal degree in co-relation 1751. Up to 290 conditions per place. [2023-08-30 15:22:55,532 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 65 selfloop transitions, 47 changer transitions 2/114 dead transitions. [2023-08-30 15:22:55,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 114 transitions, 648 flow [2023-08-30 15:22:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:22:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:22:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1897 transitions. [2023-08-30 15:22:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25746471226927253 [2023-08-30 15:22:55,538 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1897 transitions. [2023-08-30 15:22:55,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1897 transitions. [2023-08-30 15:22:55,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:55,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1897 transitions. [2023-08-30 15:22:55,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.04166666666667) internal successors, (1897), 24 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:55,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:55,547 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:55,547 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 83 flow. Second operand 24 states and 1897 transitions. [2023-08-30 15:22:55,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 114 transitions, 648 flow [2023-08-30 15:22:55,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 114 transitions, 601 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-08-30 15:22:55,572 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 435 flow [2023-08-30 15:22:55,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=435, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-08-30 15:22:55,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2023-08-30 15:22:55,574 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 435 flow [2023-08-30 15:22:55,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:55,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:55,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:55,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:55,780 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 [2023-08-30 15:22:55,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:55,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1936656204, now seen corresponding path program 1 times [2023-08-30 15:22:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682444656] [2023-08-30 15:22:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:56,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:56,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682444656] [2023-08-30 15:22:56,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682444656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774271832] [2023-08-30 15:22:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:56,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:56,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:56,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:22:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:22:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:22:56,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:56,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:56,992 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 169 treesize of output 137 [2023-08-30 15:22:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:22:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774271832] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:22:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 16 [2023-08-30 15:22:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016369520] [2023-08-30 15:22:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:22:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:22:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:22:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 15:22:57,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 307 [2023-08-30 15:22:57,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:57,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:57,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 307 [2023-08-30 15:22:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:57,728 INFO L130 PetriNetUnfolder]: 375/648 cut-off events. [2023-08-30 15:22:57,728 INFO L131 PetriNetUnfolder]: For 1548/1548 co-relation queries the response was YES. [2023-08-30 15:22:57,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 648 events. 375/648 cut-off events. For 1548/1548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2717 event pairs, 44 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2479. Up to 439 conditions per place. [2023-08-30 15:22:57,731 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 55 selfloop transitions, 29 changer transitions 1/85 dead transitions. [2023-08-30 15:22:57,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 722 flow [2023-08-30 15:22:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:22:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:22:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 910 transitions. [2023-08-30 15:22:57,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705211726384365 [2023-08-30 15:22:57,735 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 910 transitions. [2023-08-30 15:22:57,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 910 transitions. [2023-08-30 15:22:57,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:57,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 910 transitions. [2023-08-30 15:22:57,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:57,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:57,739 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:57,739 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 435 flow. Second operand 8 states and 910 transitions. [2023-08-30 15:22:57,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 722 flow [2023-08-30 15:22:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 662 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-30 15:22:57,745 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 566 flow [2023-08-30 15:22:57,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=566, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-30 15:22:57,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-08-30 15:22:57,747 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 566 flow [2023-08-30 15:22:57,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:57,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:57,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:57,951 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 [2023-08-30 15:22:57,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:57,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash -129723556, now seen corresponding path program 1 times [2023-08-30 15:22:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:57,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065633564] [2023-08-30 15:22:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:22:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065633564] [2023-08-30 15:22:58,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065633564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173141644] [2023-08-30 15:22:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:58,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:58,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:58,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:22:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:22:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:58,331 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 [2023-08-30 15:22:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:58,476 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 14 treesize of output 6 [2023-08-30 15:22:58,483 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 15:22:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173141644] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:58,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:58,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-30 15:22:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654259430] [2023-08-30 15:22:58,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:58,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:22:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:22:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:22:58,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 307 [2023-08-30 15:22:58,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 566 flow. Second operand has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:58,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:58,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 307 [2023-08-30 15:22:58,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:58,968 INFO L130 PetriNetUnfolder]: 271/516 cut-off events. [2023-08-30 15:22:58,968 INFO L131 PetriNetUnfolder]: For 3889/3889 co-relation queries the response was YES. [2023-08-30 15:22:58,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 516 events. 271/516 cut-off events. For 3889/3889 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2296 event pairs, 52 based on Foata normal form. 132/642 useless extension candidates. Maximal degree in co-relation 2195. Up to 285 conditions per place. [2023-08-30 15:22:58,970 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 39 selfloop transitions, 14 changer transitions 29/85 dead transitions. [2023-08-30 15:22:58,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 765 flow [2023-08-30 15:22:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:22:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:22:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1405 transitions. [2023-08-30 15:22:58,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137893593919653 [2023-08-30 15:22:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1405 transitions. [2023-08-30 15:22:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1405 transitions. [2023-08-30 15:22:58,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:58,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1405 transitions. [2023-08-30 15:22:58,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.08333333333333) internal successors, (1405), 12 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:58,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:58,980 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:58,980 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 566 flow. Second operand 12 states and 1405 transitions. [2023-08-30 15:22:58,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 765 flow [2023-08-30 15:22:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 698 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-30 15:22:58,986 INFO L231 Difference]: Finished difference. Result has 76 places, 51 transitions, 438 flow [2023-08-30 15:22:58,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=76, PETRI_TRANSITIONS=51} [2023-08-30 15:22:58,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2023-08-30 15:22:58,987 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 51 transitions, 438 flow [2023-08-30 15:22:58,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:22:58,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:58,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:58,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 15:22:59,191 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 [2023-08-30 15:22:59,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:22:59,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 93379440, now seen corresponding path program 2 times [2023-08-30 15:22:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96230881] [2023-08-30 15:22:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96230881] [2023-08-30 15:22:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96230881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881199329] [2023-08-30 15:22:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:59,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:59,899 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:59,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:22:59,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:22:59,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:23:00,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:00,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:00,748 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 15:23:00,748 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 231 treesize of output 191 [2023-08-30 15:23:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:01,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881199329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:01,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 15:23:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728706011] [2023-08-30 15:23:01,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:01,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:23:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:23:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-08-30 15:23:03,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 307 [2023-08-30 15:23:03,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 51 transitions, 438 flow. Second operand has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:03,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:03,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 307 [2023-08-30 15:23:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:04,890 INFO L130 PetriNetUnfolder]: 385/673 cut-off events. [2023-08-30 15:23:04,890 INFO L131 PetriNetUnfolder]: For 4958/4958 co-relation queries the response was YES. [2023-08-30 15:23:04,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3400 conditions, 673 events. 385/673 cut-off events. For 4958/4958 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2934 event pairs, 34 based on Foata normal form. 44/717 useless extension candidates. Maximal degree in co-relation 3369. Up to 291 conditions per place. [2023-08-30 15:23:04,895 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 75 selfloop transitions, 60 changer transitions 2/137 dead transitions. [2023-08-30 15:23:04,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1423 flow [2023-08-30 15:23:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:23:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:23:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2271 transitions. [2023-08-30 15:23:04,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216258320351225 [2023-08-30 15:23:04,912 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2271 transitions. [2023-08-30 15:23:04,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2271 transitions. [2023-08-30 15:23:04,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:04,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2271 transitions. [2023-08-30 15:23:04,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 98.73913043478261) internal successors, (2271), 23 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:04,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:04,929 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:04,930 INFO L175 Difference]: Start difference. First operand has 76 places, 51 transitions, 438 flow. Second operand 23 states and 2271 transitions. [2023-08-30 15:23:04,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1423 flow [2023-08-30 15:23:04,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1261 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-08-30 15:23:04,943 INFO L231 Difference]: Finished difference. Result has 84 places, 94 transitions, 1059 flow [2023-08-30 15:23:04,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1059, PETRI_PLACES=84, PETRI_TRANSITIONS=94} [2023-08-30 15:23:04,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-08-30 15:23:04,945 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 94 transitions, 1059 flow [2023-08-30 15:23:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:04,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:04,946 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:04,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:05,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:05,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:05,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2085225044, now seen corresponding path program 2 times [2023-08-30 15:23:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001515624] [2023-08-30 15:23:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:06,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001515624] [2023-08-30 15:23:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001515624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504782896] [2023-08-30 15:23:06,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:23:06,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:06,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:06,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:23:06,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:23:06,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:23:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:23:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:23:06,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:06,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:06,754 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 168 treesize of output 136 [2023-08-30 15:23:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:23:07,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504782896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:07,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:07,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 18 [2023-08-30 15:23:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738001735] [2023-08-30 15:23:07,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:07,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:23:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:23:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:23:08,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 307 [2023-08-30 15:23:08,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 94 transitions, 1059 flow. Second operand has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:08,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:08,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 307 [2023-08-30 15:23:08,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:09,464 INFO L130 PetriNetUnfolder]: 497/875 cut-off events. [2023-08-30 15:23:09,464 INFO L131 PetriNetUnfolder]: For 4252/4252 co-relation queries the response was YES. [2023-08-30 15:23:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4605 conditions, 875 events. 497/875 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4101 event pairs, 50 based on Foata normal form. 60/935 useless extension candidates. Maximal degree in co-relation 4572. Up to 338 conditions per place. [2023-08-30 15:23:09,469 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 97 selfloop transitions, 56 changer transitions 8/161 dead transitions. [2023-08-30 15:23:09,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 161 transitions, 1900 flow [2023-08-30 15:23:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:23:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:23:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2304 transitions. [2023-08-30 15:23:09,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32629939102110184 [2023-08-30 15:23:09,474 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2304 transitions. [2023-08-30 15:23:09,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2304 transitions. [2023-08-30 15:23:09,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:09,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2304 transitions. [2023-08-30 15:23:09,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 100.17391304347827) internal successors, (2304), 23 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:09,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:09,484 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:09,484 INFO L175 Difference]: Start difference. First operand has 84 places, 94 transitions, 1059 flow. Second operand 23 states and 2304 transitions. [2023-08-30 15:23:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 161 transitions, 1900 flow [2023-08-30 15:23:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1576 flow, removed 155 selfloop flow, removed 6 redundant places. [2023-08-30 15:23:09,495 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 1091 flow [2023-08-30 15:23:09,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1091, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-08-30 15:23:09,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-08-30 15:23:09,496 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 1091 flow [2023-08-30 15:23:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:09,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:09,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:09,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:09,701 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,SelfDestructingSolverStorable11 [2023-08-30 15:23:09,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:09,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1461832664, now seen corresponding path program 2 times [2023-08-30 15:23:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653278928] [2023-08-30 15:23:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:10,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653278928] [2023-08-30 15:23:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653278928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519424635] [2023-08-30 15:23:10,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:23:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:10,982 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) [2023-08-30 15:23:10,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:23:11,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:23:11,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:23:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:23:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:11,948 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 15:23:11,949 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 243 treesize of output 206 [2023-08-30 15:23:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:23:12,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519424635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:12,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:12,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 24 [2023-08-30 15:23:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444342478] [2023-08-30 15:23:12,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:12,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:23:12,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:23:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-08-30 15:23:13,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-08-30 15:23:13,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 1091 flow. Second operand has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:13,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:13,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-08-30 15:23:13,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:15,555 INFO L130 PetriNetUnfolder]: 749/1271 cut-off events. [2023-08-30 15:23:15,556 INFO L131 PetriNetUnfolder]: For 5752/5752 co-relation queries the response was YES. [2023-08-30 15:23:15,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6011 conditions, 1271 events. 749/1271 cut-off events. For 5752/5752 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6253 event pairs, 24 based on Foata normal form. 28/1299 useless extension candidates. Maximal degree in co-relation 5974. Up to 545 conditions per place. [2023-08-30 15:23:15,588 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 103 selfloop transitions, 107 changer transitions 9/219 dead transitions. [2023-08-30 15:23:15,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2236 flow [2023-08-30 15:23:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 15:23:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 15:23:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3400 transitions. [2023-08-30 15:23:15,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356035929325832 [2023-08-30 15:23:15,594 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3400 transitions. [2023-08-30 15:23:15,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3400 transitions. [2023-08-30 15:23:15,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:15,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3400 transitions. [2023-08-30 15:23:15,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.03030303030303) internal successors, (3400), 33 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:15,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:15,610 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:15,610 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 1091 flow. Second operand 33 states and 3400 transitions. [2023-08-30 15:23:15,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2236 flow [2023-08-30 15:23:15,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 219 transitions, 2114 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-08-30 15:23:15,629 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1889 flow [2023-08-30 15:23:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1889, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2023-08-30 15:23:15,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2023-08-30 15:23:15,630 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1889 flow [2023-08-30 15:23:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:15,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:15,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:15,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:15,835 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,SelfDestructingSolverStorable12 [2023-08-30 15:23:15,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:15,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash -629147281, now seen corresponding path program 1 times [2023-08-30 15:23:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:15,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935997411] [2023-08-30 15:23:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:15,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935997411] [2023-08-30 15:23:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935997411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885431607] [2023-08-30 15:23:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:16,625 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) [2023-08-30 15:23:16,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:23:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:16,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:23:16,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:16,742 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 16 treesize of output 12 [2023-08-30 15:23:16,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-08-30 15:23:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:16,836 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 21 [2023-08-30 15:23:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:16,881 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 21 [2023-08-30 15:23:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:18,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:18,248 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 [2023-08-30 15:23:18,309 INFO L321 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-08-30 15:23:18,310 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 559 [2023-08-30 15:23:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:23:18,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:18,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-08-30 15:23:18,375 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-30 15:23:18,376 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 153 [2023-08-30 15:23:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:20,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885431607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:20,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:20,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:23:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819246324] [2023-08-30 15:23:20,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:20,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:23:20,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:23:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=790, Unknown=3, NotChecked=0, Total=992 [2023-08-30 15:23:20,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 15:23:20,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1889 flow. Second operand has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:20,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:20,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 15:23:20,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:28,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:23:32,417 INFO L130 PetriNetUnfolder]: 881/1501 cut-off events. [2023-08-30 15:23:32,417 INFO L131 PetriNetUnfolder]: For 8498/8498 co-relation queries the response was YES. [2023-08-30 15:23:32,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 1501 events. 881/1501 cut-off events. For 8498/8498 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7673 event pairs, 100 based on Foata normal form. 40/1541 useless extension candidates. Maximal degree in co-relation 8295. Up to 886 conditions per place. [2023-08-30 15:23:32,426 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 157 selfloop transitions, 96 changer transitions 5/258 dead transitions. [2023-08-30 15:23:32,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3163 flow [2023-08-30 15:23:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 15:23:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 15:23:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2663 transitions. [2023-08-30 15:23:32,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2478362028850628 [2023-08-30 15:23:32,430 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2663 transitions. [2023-08-30 15:23:32,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2663 transitions. [2023-08-30 15:23:32,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:32,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2663 transitions. [2023-08-30 15:23:32,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 76.08571428571429) internal successors, (2663), 35 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:32,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:32,440 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:32,441 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1889 flow. Second operand 35 states and 2663 transitions. [2023-08-30 15:23:32,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3163 flow [2023-08-30 15:23:32,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 258 transitions, 2743 flow, removed 170 selfloop flow, removed 13 redundant places. [2023-08-30 15:23:32,471 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2318 flow [2023-08-30 15:23:32,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2318, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2023-08-30 15:23:32,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-08-30 15:23:32,472 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2318 flow [2023-08-30 15:23:32,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:32,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:32,472 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:32,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:32,676 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,SelfDestructingSolverStorable13 [2023-08-30 15:23:32,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:32,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1461544364, now seen corresponding path program 3 times [2023-08-30 15:23:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:32,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6093472] [2023-08-30 15:23:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:32,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:34,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6093472] [2023-08-30 15:23:34,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6093472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072872093] [2023-08-30 15:23:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:23:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:34,499 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) [2023-08-30 15:23:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:23:34,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:23:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:23:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:23:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:35,330 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 15:23:35,330 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 237 treesize of output 200 [2023-08-30 15:23:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:23:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072872093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:35,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:35,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 24 [2023-08-30 15:23:35,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990433494] [2023-08-30 15:23:35,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:23:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:23:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-08-30 15:23:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 15:23:37,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2318 flow. Second operand has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:37,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:37,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 15:23:37,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:39,743 INFO L130 PetriNetUnfolder]: 1133/1905 cut-off events. [2023-08-30 15:23:39,743 INFO L131 PetriNetUnfolder]: For 14481/14481 co-relation queries the response was YES. [2023-08-30 15:23:39,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 1905 events. 1133/1905 cut-off events. For 14481/14481 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10151 event pairs, 26 based on Foata normal form. 56/1961 useless extension candidates. Maximal degree in co-relation 10497. Up to 695 conditions per place. [2023-08-30 15:23:39,754 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 168 selfloop transitions, 131 changer transitions 7/306 dead transitions. [2023-08-30 15:23:39,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 306 transitions, 3881 flow [2023-08-30 15:23:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:23:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:23:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2726 transitions. [2023-08-30 15:23:39,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712424383434157 [2023-08-30 15:23:39,758 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2726 transitions. [2023-08-30 15:23:39,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2726 transitions. [2023-08-30 15:23:39,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:39,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2726 transitions. [2023-08-30 15:23:39,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.35714285714286) internal successors, (2726), 28 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:39,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:39,765 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:39,765 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2318 flow. Second operand 28 states and 2726 transitions. [2023-08-30 15:23:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 306 transitions, 3881 flow [2023-08-30 15:23:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 3658 flow, removed 82 selfloop flow, removed 16 redundant places. [2023-08-30 15:23:39,807 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2923 flow [2023-08-30 15:23:39,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2923, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2023-08-30 15:23:39,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2023-08-30 15:23:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2923 flow [2023-08-30 15:23:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:39,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 15:23:40,013 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,SelfDestructingSolverStorable14 [2023-08-30 15:23:40,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:40,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1927834054, now seen corresponding path program 2 times [2023-08-30 15:23:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:40,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470524400] [2023-08-30 15:23:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:40,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470524400] [2023-08-30 15:23:40,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470524400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:40,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150607953] [2023-08-30 15:23:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:23:40,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:40,674 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) [2023-08-30 15:23:40,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:23:40,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:23:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:23:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:41,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:42,170 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-30 15:23:42,170 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 278 treesize of output 239 [2023-08-30 15:23:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150607953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:43,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:43,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-30 15:23:43,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840469829] [2023-08-30 15:23:43,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:43,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:23:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:23:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:23:44,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 15:23:44,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2923 flow. Second operand has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:44,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:44,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 15:23:44,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:47,342 INFO L130 PetriNetUnfolder]: 1601/2681 cut-off events. [2023-08-30 15:23:47,342 INFO L131 PetriNetUnfolder]: For 26550/26550 co-relation queries the response was YES. [2023-08-30 15:23:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2681 events. 1601/2681 cut-off events. For 26550/26550 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 15250 event pairs, 138 based on Foata normal form. 58/2739 useless extension candidates. Maximal degree in co-relation 16527. Up to 1401 conditions per place. [2023-08-30 15:23:47,360 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 203 selfloop transitions, 195 changer transitions 4/402 dead transitions. [2023-08-30 15:23:47,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 402 transitions, 5636 flow [2023-08-30 15:23:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 15:23:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 15:23:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3494 transitions. [2023-08-30 15:23:47,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33473845564284344 [2023-08-30 15:23:47,364 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3494 transitions. [2023-08-30 15:23:47,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3494 transitions. [2023-08-30 15:23:47,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:47,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3494 transitions. [2023-08-30 15:23:47,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 102.76470588235294) internal successors, (3494), 34 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:47,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:47,373 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:47,373 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2923 flow. Second operand 34 states and 3494 transitions. [2023-08-30 15:23:47,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 402 transitions, 5636 flow [2023-08-30 15:23:47,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 5411 flow, removed 51 selfloop flow, removed 18 redundant places. [2023-08-30 15:23:47,437 INFO L231 Difference]: Finished difference. Result has 212 places, 342 transitions, 5208 flow [2023-08-30 15:23:47,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5208, PETRI_PLACES=212, PETRI_TRANSITIONS=342} [2023-08-30 15:23:47,437 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-08-30 15:23:47,437 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 342 transitions, 5208 flow [2023-08-30 15:23:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:47,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:47,642 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,SelfDestructingSolverStorable15 [2023-08-30 15:23:47,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:47,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1936771354, now seen corresponding path program 3 times [2023-08-30 15:23:47,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:47,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150336472] [2023-08-30 15:23:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:47,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:48,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150336472] [2023-08-30 15:23:48,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150336472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:48,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623343240] [2023-08-30 15:23:48,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:23:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:48,579 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) [2023-08-30 15:23:48,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:23:48,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:23:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:23:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:23:48,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:49,150 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 15:23:49,150 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 225 treesize of output 188 [2023-08-30 15:23:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:23:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623343240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:49,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2023-08-30 15:23:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46119275] [2023-08-30 15:23:49,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:23:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:23:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-08-30 15:23:51,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-08-30 15:23:51,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 342 transitions, 5208 flow. Second operand has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:51,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:51,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-08-30 15:23:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:54,487 INFO L130 PetriNetUnfolder]: 2059/3455 cut-off events. [2023-08-30 15:23:54,487 INFO L131 PetriNetUnfolder]: For 46775/46775 co-relation queries the response was YES. [2023-08-30 15:23:54,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24371 conditions, 3455 events. 2059/3455 cut-off events. For 46775/46775 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20182 event pairs, 108 based on Foata normal form. 124/3579 useless extension candidates. Maximal degree in co-relation 24295. Up to 1129 conditions per place. [2023-08-30 15:23:54,510 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 248 selfloop transitions, 294 changer transitions 6/548 dead transitions. [2023-08-30 15:23:54,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 548 transitions, 9632 flow [2023-08-30 15:23:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 15:23:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 15:23:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3851 transitions. [2023-08-30 15:23:54,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390263227396778 [2023-08-30 15:23:54,528 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3851 transitions. [2023-08-30 15:23:54,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3851 transitions. [2023-08-30 15:23:54,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:54,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3851 transitions. [2023-08-30 15:23:54,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 104.08108108108108) internal successors, (3851), 37 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:54,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:54,538 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:54,538 INFO L175 Difference]: Start difference. First operand has 212 places, 342 transitions, 5208 flow. Second operand 37 states and 3851 transitions. [2023-08-30 15:23:54,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 548 transitions, 9632 flow [2023-08-30 15:23:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 548 transitions, 8110 flow, removed 742 selfloop flow, removed 12 redundant places. [2023-08-30 15:23:54,733 INFO L231 Difference]: Finished difference. Result has 247 places, 445 transitions, 7276 flow [2023-08-30 15:23:54,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7276, PETRI_PLACES=247, PETRI_TRANSITIONS=445} [2023-08-30 15:23:54,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2023-08-30 15:23:54,734 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 445 transitions, 7276 flow [2023-08-30 15:23:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:54,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:54,734 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:54,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:54,937 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,SelfDestructingSolverStorable16 [2023-08-30 15:23:54,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:23:54,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2020965747, now seen corresponding path program 4 times [2023-08-30 15:23:54,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068012687] [2023-08-30 15:23:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:56,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068012687] [2023-08-30 15:23:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068012687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205470602] [2023-08-30 15:23:56,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:23:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:56,525 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) [2023-08-30 15:23:56,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:23:56,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:23:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:56,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:23:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:23:56,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:57,354 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:23:57,355 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 247 treesize of output 218 [2023-08-30 15:23:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:23:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205470602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:57,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 27 [2023-08-30 15:23:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082208542] [2023-08-30 15:23:57,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:23:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:23:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-08-30 15:23:59,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 15:23:59,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 445 transitions, 7276 flow. Second operand has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:23:59,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:59,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 15:23:59,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:02,324 INFO L130 PetriNetUnfolder]: 2497/4201 cut-off events. [2023-08-30 15:24:02,325 INFO L131 PetriNetUnfolder]: For 55706/55706 co-relation queries the response was YES. [2023-08-30 15:24:02,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 4201 events. 2497/4201 cut-off events. For 55706/55706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26040 event pairs, 182 based on Foata normal form. 32/4233 useless extension candidates. Maximal degree in co-relation 29105. Up to 1691 conditions per place. [2023-08-30 15:24:02,363 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 374 selfloop transitions, 272 changer transitions 7/653 dead transitions. [2023-08-30 15:24:02,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 653 transitions, 10824 flow [2023-08-30 15:24:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 15:24:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 15:24:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5011 transitions. [2023-08-30 15:24:02,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33311174632719537 [2023-08-30 15:24:02,368 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5011 transitions. [2023-08-30 15:24:02,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5011 transitions. [2023-08-30 15:24:02,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:02,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5011 transitions. [2023-08-30 15:24:02,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 102.26530612244898) internal successors, (5011), 49 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:02,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:02,382 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:02,382 INFO L175 Difference]: Start difference. First operand has 247 places, 445 transitions, 7276 flow. Second operand 49 states and 5011 transitions. [2023-08-30 15:24:02,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 653 transitions, 10824 flow [2023-08-30 15:24:02,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 653 transitions, 9459 flow, removed 641 selfloop flow, removed 16 redundant places. [2023-08-30 15:24:02,718 INFO L231 Difference]: Finished difference. Result has 290 places, 519 transitions, 8123 flow [2023-08-30 15:24:02,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8123, PETRI_PLACES=290, PETRI_TRANSITIONS=519} [2023-08-30 15:24:02,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2023-08-30 15:24:02,719 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 519 transitions, 8123 flow [2023-08-30 15:24:02,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:02,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:02,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:02,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:02,924 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:24:02,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 310829972, now seen corresponding path program 5 times [2023-08-30 15:24:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354656344] [2023-08-30 15:24:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:24:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354656344] [2023-08-30 15:24:03,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354656344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348745687] [2023-08-30 15:24:03,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:24:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:03,069 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) [2023-08-30 15:24:03,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 15:24:03,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:24:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:24:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:24:03,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:04,051 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 15:24:04,052 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 245 treesize of output 179 [2023-08-30 15:24:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:24:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348745687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:04,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 15:24:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794079960] [2023-08-30 15:24:04,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:24:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:24:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 15:24:04,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 307 [2023-08-30 15:24:04,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 519 transitions, 8123 flow. Second operand has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:04,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:04,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 307 [2023-08-30 15:24:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:05,275 INFO L130 PetriNetUnfolder]: 2189/3723 cut-off events. [2023-08-30 15:24:05,275 INFO L131 PetriNetUnfolder]: For 50016/50040 co-relation queries the response was YES. [2023-08-30 15:24:05,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25663 conditions, 3723 events. 2189/3723 cut-off events. For 50016/50040 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 22797 event pairs, 1132 based on Foata normal form. 24/3719 useless extension candidates. Maximal degree in co-relation 25572. Up to 3514 conditions per place. [2023-08-30 15:24:05,313 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 456 selfloop transitions, 9 changer transitions 2/479 dead transitions. [2023-08-30 15:24:05,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 479 transitions, 8333 flow [2023-08-30 15:24:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:24:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:24:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2023-08-30 15:24:05,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762214983713355 [2023-08-30 15:24:05,319 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2023-08-30 15:24:05,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2023-08-30 15:24:05,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:05,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2023-08-30 15:24:05,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:05,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:05,322 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:05,322 INFO L175 Difference]: Start difference. First operand has 290 places, 519 transitions, 8123 flow. Second operand 8 states and 924 transitions. [2023-08-30 15:24:05,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 479 transitions, 8333 flow [2023-08-30 15:24:05,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 479 transitions, 7825 flow, removed 176 selfloop flow, removed 29 redundant places. [2023-08-30 15:24:05,514 INFO L231 Difference]: Finished difference. Result has 260 places, 466 transitions, 6798 flow [2023-08-30 15:24:05,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=260, PETRI_TRANSITIONS=466} [2023-08-30 15:24:05,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2023-08-30 15:24:05,515 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 466 transitions, 6798 flow [2023-08-30 15:24:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:05,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:05,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:05,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:05,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:05,720 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:24:05,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 979867604, now seen corresponding path program 6 times [2023-08-30 15:24:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:05,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81522548] [2023-08-30 15:24:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:24:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81522548] [2023-08-30 15:24:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81522548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350761714] [2023-08-30 15:24:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:24:05,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:05,876 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) [2023-08-30 15:24:05,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 15:24:05,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:24:05,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:24:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:06,147 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 [2023-08-30 15:24:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:06,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:06,290 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 14 treesize of output 6 [2023-08-30 15:24:06,295 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 15:24:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:06,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350761714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:06,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:06,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-30 15:24:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55820214] [2023-08-30 15:24:06,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:06,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:24:06,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:24:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:24:06,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 307 [2023-08-30 15:24:06,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 466 transitions, 6798 flow. Second operand has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:06,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:06,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 307 [2023-08-30 15:24:06,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:07,563 INFO L130 PetriNetUnfolder]: 2439/4151 cut-off events. [2023-08-30 15:24:07,563 INFO L131 PetriNetUnfolder]: For 54666/54666 co-relation queries the response was YES. [2023-08-30 15:24:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 4151 events. 2439/4151 cut-off events. For 54666/54666 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25573 event pairs, 398 based on Foata normal form. 128/4275 useless extension candidates. Maximal degree in co-relation 27158. Up to 3021 conditions per place. [2023-08-30 15:24:07,596 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 376 selfloop transitions, 98 changer transitions 59/533 dead transitions. [2023-08-30 15:24:07,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 533 transitions, 8570 flow [2023-08-30 15:24:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:24:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:24:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2255 transitions. [2023-08-30 15:24:07,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36726384364820847 [2023-08-30 15:24:07,599 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2255 transitions. [2023-08-30 15:24:07,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2255 transitions. [2023-08-30 15:24:07,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:07,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2255 transitions. [2023-08-30 15:24:07,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.75) internal successors, (2255), 20 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:07,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:07,604 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:07,604 INFO L175 Difference]: Start difference. First operand has 260 places, 466 transitions, 6798 flow. Second operand 20 states and 2255 transitions. [2023-08-30 15:24:07,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 533 transitions, 8570 flow [2023-08-30 15:24:07,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 533 transitions, 8499 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-30 15:24:07,791 INFO L231 Difference]: Finished difference. Result has 278 places, 459 transitions, 7106 flow [2023-08-30 15:24:07,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7106, PETRI_PLACES=278, PETRI_TRANSITIONS=459} [2023-08-30 15:24:07,791 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2023-08-30 15:24:07,792 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 459 transitions, 7106 flow [2023-08-30 15:24:07,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:07,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:07,793 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:07,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:07,997 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:24:07,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1511061001, now seen corresponding path program 4 times [2023-08-30 15:24:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964431883] [2023-08-30 15:24:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964431883] [2023-08-30 15:24:09,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964431883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763366687] [2023-08-30 15:24:09,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:24:09,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:09,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:09,552 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) [2023-08-30 15:24:09,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 15:24:09,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:24:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:24:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:11,274 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 15:24:11,275 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 278 treesize of output 244 [2023-08-30 15:24:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763366687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:12,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 15:24:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666873067] [2023-08-30 15:24:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 15:24:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 15:24:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 15:24:15,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-08-30 15:24:15,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 459 transitions, 7106 flow. Second operand has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:15,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:15,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-08-30 15:24:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:24,516 INFO L130 PetriNetUnfolder]: 3955/6586 cut-off events. [2023-08-30 15:24:24,516 INFO L131 PetriNetUnfolder]: For 139294/139294 co-relation queries the response was YES. [2023-08-30 15:24:24,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51340 conditions, 6586 events. 3955/6586 cut-off events. For 139294/139294 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41459 event pairs, 288 based on Foata normal form. 180/6758 useless extension candidates. Maximal degree in co-relation 51248. Up to 2659 conditions per place. [2023-08-30 15:24:24,585 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 489 selfloop transitions, 552 changer transitions 11/1052 dead transitions. [2023-08-30 15:24:24,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1052 transitions, 19451 flow [2023-08-30 15:24:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-30 15:24:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-30 15:24:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 7844 transitions. [2023-08-30 15:24:24,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31543813085615474 [2023-08-30 15:24:24,592 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 7844 transitions. [2023-08-30 15:24:24,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 7844 transitions. [2023-08-30 15:24:24,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:24,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 7844 transitions. [2023-08-30 15:24:24,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 96.8395061728395) internal successors, (7844), 81 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:24,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:24,615 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:24,616 INFO L175 Difference]: Start difference. First operand has 278 places, 459 transitions, 7106 flow. Second operand 81 states and 7844 transitions. [2023-08-30 15:24:24,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1052 transitions, 19451 flow [2023-08-30 15:24:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1052 transitions, 18431 flow, removed 472 selfloop flow, removed 17 redundant places. [2023-08-30 15:24:25,114 INFO L231 Difference]: Finished difference. Result has 331 places, 863 transitions, 17282 flow [2023-08-30 15:24:25,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17282, PETRI_PLACES=331, PETRI_TRANSITIONS=863} [2023-08-30 15:24:25,115 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2023-08-30 15:24:25,116 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 863 transitions, 17282 flow [2023-08-30 15:24:25,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:25,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:25,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:25,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 15:24:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:25,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:24:25,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719910, now seen corresponding path program 7 times [2023-08-30 15:24:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512689392] [2023-08-30 15:24:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512689392] [2023-08-30 15:24:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512689392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87129353] [2023-08-30 15:24:27,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:24:27,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:27,073 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) [2023-08-30 15:24:27,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 15:24:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:24:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:24:27,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:28,498 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 15:24:28,499 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 259 treesize of output 214 [2023-08-30 15:24:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:24:28,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87129353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:28,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:28,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 34 [2023-08-30 15:24:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111717414] [2023-08-30 15:24:28,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:24:28,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:24:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 15:24:31,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 15:24:31,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 863 transitions, 17282 flow. Second operand has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:31,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:31,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 15:24:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:34,896 INFO L130 PetriNetUnfolder]: 4007/6718 cut-off events. [2023-08-30 15:24:34,896 INFO L131 PetriNetUnfolder]: For 124776/124776 co-relation queries the response was YES. [2023-08-30 15:24:34,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53640 conditions, 6718 events. 4007/6718 cut-off events. For 124776/124776 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42956 event pairs, 446 based on Foata normal form. 108/6826 useless extension candidates. Maximal degree in co-relation 53543. Up to 3417 conditions per place. [2023-08-30 15:24:35,076 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 652 selfloop transitions, 274 changer transitions 11/937 dead transitions. [2023-08-30 15:24:35,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 937 transitions, 20109 flow [2023-08-30 15:24:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 15:24:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 15:24:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2023-08-30 15:24:35,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33280916544984834 [2023-08-30 15:24:35,088 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2023-08-30 15:24:35,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2023-08-30 15:24:35,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:35,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2023-08-30 15:24:35,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:35,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:35,096 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:35,096 INFO L175 Difference]: Start difference. First operand has 331 places, 863 transitions, 17282 flow. Second operand 29 states and 2963 transitions. [2023-08-30 15:24:35,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 937 transitions, 20109 flow [2023-08-30 15:24:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 937 transitions, 15060 flow, removed 2493 selfloop flow, removed 14 redundant places. [2023-08-30 15:24:36,054 INFO L231 Difference]: Finished difference. Result has 350 places, 858 transitions, 13308 flow [2023-08-30 15:24:36,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12148, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13308, PETRI_PLACES=350, PETRI_TRANSITIONS=858} [2023-08-30 15:24:36,056 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-08-30 15:24:36,056 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 858 transitions, 13308 flow [2023-08-30 15:24:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:36,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:36,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:36,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:36,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:36,262 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:24:36,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1516416119, now seen corresponding path program 5 times [2023-08-30 15:24:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:36,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312019717] [2023-08-30 15:24:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312019717] [2023-08-30 15:24:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312019717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372799025] [2023-08-30 15:24:37,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:24:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:37,457 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) [2023-08-30 15:24:37,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 15:24:37,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:24:37,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:24:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:38,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:39,627 INFO L321 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2023-08-30 15:24:39,627 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 276 treesize of output 246 [2023-08-30 15:24:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:41,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372799025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:41,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:41,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-30 15:24:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540064556] [2023-08-30 15:24:41,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:41,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 15:24:41,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 15:24:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 15:24:43,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:45,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:48,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:50,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:52,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:54,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-08-30 15:24:54,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 858 transitions, 13308 flow. Second operand has 43 states, 43 states have (on average 93.25581395348837) internal successors, (4010), 43 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:54,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:54,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-08-30 15:24:54,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:25,897 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] [2023-08-30 15:25:28,016 INFO L130 PetriNetUnfolder]: 5959/9906 cut-off events. [2023-08-30 15:25:28,016 INFO L131 PetriNetUnfolder]: For 125861/125861 co-relation queries the response was YES. [2023-08-30 15:25:28,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 9906 events. 5959/9906 cut-off events. For 125861/125861 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 66470 event pairs, 852 based on Foata normal form. 140/9994 useless extension candidates. Maximal degree in co-relation 66108. Up to 4797 conditions per place. [2023-08-30 15:25:28,135 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 945 selfloop transitions, 615 changer transitions 12/1572 dead transitions. [2023-08-30 15:25:28,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1572 transitions, 25240 flow [2023-08-30 15:25:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 15:25:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 15:25:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9240 transitions. [2023-08-30 15:25:28,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3135179153094462 [2023-08-30 15:25:28,143 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9240 transitions. [2023-08-30 15:25:28,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9240 transitions. [2023-08-30 15:25:28,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:28,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9240 transitions. [2023-08-30 15:25:28,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 96.25) internal successors, (9240), 96 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:28,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:28,172 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:28,173 INFO L175 Difference]: Start difference. First operand has 350 places, 858 transitions, 13308 flow. Second operand 96 states and 9240 transitions. [2023-08-30 15:25:28,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1572 transitions, 25240 flow [2023-08-30 15:25:29,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1572 transitions, 24770 flow, removed 151 selfloop flow, removed 20 redundant places. [2023-08-30 15:25:29,064 INFO L231 Difference]: Finished difference. Result has 450 places, 1209 transitions, 21034 flow [2023-08-30 15:25:29,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12997, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=21034, PETRI_PLACES=450, PETRI_TRANSITIONS=1209} [2023-08-30 15:25:29,065 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 420 predicate places. [2023-08-30 15:25:29,065 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1209 transitions, 21034 flow [2023-08-30 15:25:29,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 93.25581395348837) internal successors, (4010), 43 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:29,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:29,271 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:29,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 355266967, now seen corresponding path program 8 times [2023-08-30 15:25:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121811520] [2023-08-30 15:25:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:30,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121811520] [2023-08-30 15:25:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121811520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783638626] [2023-08-30 15:25:30,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:30,686 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) [2023-08-30 15:25:30,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 15:25:30,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:25:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 15:25:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:30,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:25:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:30,999 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 [2023-08-30 15:25:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:31,045 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 [2023-08-30 15:25:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:31,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:32,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:32,619 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 152 treesize of output 104 [2023-08-30 15:25:32,703 INFO L321 Elim1Store]: treesize reduction 10, result has 90.3 percent of original size [2023-08-30 15:25:32,703 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 317 treesize of output 358 [2023-08-30 15:25:32,753 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-08-30 15:25:32,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 261 treesize of output 241 [2023-08-30 15:25:32,810 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-08-30 15:25:32,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 164 treesize of output 177 [2023-08-30 15:25:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:40,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783638626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:40,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:40,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-08-30 15:25:40,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049412421] [2023-08-30 15:25:40,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:40,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 15:25:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 15:25:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1472, Unknown=2, NotChecked=0, Total=1722 [2023-08-30 15:25:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 15:25:43,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1209 transitions, 21034 flow. Second operand has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 15:25:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:09,389 INFO L130 PetriNetUnfolder]: 8213/13560 cut-off events. [2023-08-30 15:26:09,389 INFO L131 PetriNetUnfolder]: For 300178/300178 co-relation queries the response was YES. [2023-08-30 15:26:09,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104303 conditions, 13560 events. 8213/13560 cut-off events. For 300178/300178 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 94086 event pairs, 818 based on Foata normal form. 308/13812 useless extension candidates. Maximal degree in co-relation 104180. Up to 6760 conditions per place. [2023-08-30 15:26:09,685 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1076 selfloop transitions, 968 changer transitions 8/2052 dead transitions. [2023-08-30 15:26:09,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2052 transitions, 37951 flow [2023-08-30 15:26:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-08-30 15:26:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-08-30 15:26:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 8500 transitions. [2023-08-30 15:26:09,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2494351028552983 [2023-08-30 15:26:09,694 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 8500 transitions. [2023-08-30 15:26:09,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 8500 transitions. [2023-08-30 15:26:09,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:09,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 8500 transitions. [2023-08-30 15:26:09,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 76.57657657657657) internal successors, (8500), 111 states have internal predecessors, (8500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:09,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:09,728 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:09,729 INFO L175 Difference]: Start difference. First operand has 450 places, 1209 transitions, 21034 flow. Second operand 111 states and 8500 transitions. [2023-08-30 15:26:09,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2052 transitions, 37951 flow [2023-08-30 15:26:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2052 transitions, 35659 flow, removed 946 selfloop flow, removed 24 redundant places. [2023-08-30 15:26:11,950 INFO L231 Difference]: Finished difference. Result has 576 places, 1714 transitions, 32855 flow [2023-08-30 15:26:11,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=18881, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=32855, PETRI_PLACES=576, PETRI_TRANSITIONS=1714} [2023-08-30 15:26:11,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2023-08-30 15:26:11,952 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1714 transitions, 32855 flow [2023-08-30 15:26:11,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:11,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:11,952 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:11,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:12,157 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,SelfDestructingSolverStorable23 [2023-08-30 15:26:12,157 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:26:12,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash 355555265, now seen corresponding path program 6 times [2023-08-30 15:26:12,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:12,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325774894] [2023-08-30 15:26:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:12,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:13,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:13,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325774894] [2023-08-30 15:26:13,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325774894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:13,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807302631] [2023-08-30 15:26:13,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:26:13,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:13,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:13,385 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) [2023-08-30 15:26:13,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 15:26:13,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:26:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 15:26:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:13,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:26:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:13,713 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 [2023-08-30 15:26:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:13,760 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 [2023-08-30 15:26:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:14,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:15,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:15,788 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 [2023-08-30 15:26:15,892 INFO L321 Elim1Store]: treesize reduction 30, result has 78.7 percent of original size [2023-08-30 15:26:15,893 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 387 treesize of output 437 [2023-08-30 15:26:15,958 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 15:26:15,959 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 324 treesize of output 298 [2023-08-30 15:26:16,021 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 15:26:16,022 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 215 treesize of output 229 [2023-08-30 15:26:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807302631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:24,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:24,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-30 15:26:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79007120] [2023-08-30 15:26:24,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 15:26:24,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 15:26:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1444, Unknown=4, NotChecked=0, Total=1806 [2023-08-30 15:26:26,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-08-30 15:26:26,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1714 transitions, 32855 flow. Second operand has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:26,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:26,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-08-30 15:26:26,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:51,824 INFO L130 PetriNetUnfolder]: 9643/15986 cut-off events. [2023-08-30 15:26:51,824 INFO L131 PetriNetUnfolder]: For 391310/391310 co-relation queries the response was YES. [2023-08-30 15:26:51,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133016 conditions, 15986 events. 9643/15986 cut-off events. For 391310/391310 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 116072 event pairs, 995 based on Foata normal form. 152/16086 useless extension candidates. Maximal degree in co-relation 132854. Up to 9910 conditions per place. [2023-08-30 15:26:52,037 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1394 selfloop transitions, 851 changer transitions 17/2262 dead transitions. [2023-08-30 15:26:52,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 2262 transitions, 48974 flow [2023-08-30 15:26:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-30 15:26:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-30 15:26:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6561 transitions. [2023-08-30 15:26:52,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24850390121960458 [2023-08-30 15:26:52,043 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6561 transitions. [2023-08-30 15:26:52,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6561 transitions. [2023-08-30 15:26:52,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:52,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6561 transitions. [2023-08-30 15:26:52,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 76.29069767441861) internal successors, (6561), 86 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:52,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:52,058 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:52,059 INFO L175 Difference]: Start difference. First operand has 576 places, 1714 transitions, 32855 flow. Second operand 86 states and 6561 transitions. [2023-08-30 15:26:52,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 2262 transitions, 48974 flow [2023-08-30 15:26:56,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 2262 transitions, 39260 flow, removed 4660 selfloop flow, removed 27 redundant places. [2023-08-30 15:26:56,718 INFO L231 Difference]: Finished difference. Result has 651 places, 2031 transitions, 36066 flow [2023-08-30 15:26:56,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=27002, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=36066, PETRI_PLACES=651, PETRI_TRANSITIONS=2031} [2023-08-30 15:26:56,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 621 predicate places. [2023-08-30 15:26:56,720 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 2031 transitions, 36066 flow [2023-08-30 15:26:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:56,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:56,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:56,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:56,926 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,SelfDestructingSolverStorable24 [2023-08-30 15:26:56,926 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:26:56,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 71954555, now seen corresponding path program 7 times [2023-08-30 15:26:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:56,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096885123] [2023-08-30 15:26:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:56,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096885123] [2023-08-30 15:26:57,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096885123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410633592] [2023-08-30 15:26:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:26:57,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:57,798 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) [2023-08-30 15:26:57,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 15:26:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:26:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:58,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:59,495 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-30 15:26:59,495 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 284 treesize of output 250 [2023-08-30 15:27:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:00,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410633592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:00,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:00,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 15:27:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257494012] [2023-08-30 15:27:00,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:00,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 15:27:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 15:27:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 15:27:02,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-08-30 15:27:02,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 2031 transitions, 36066 flow. Second operand has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:02,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:02,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-08-30 15:27:02,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:15,467 INFO L130 PetriNetUnfolder]: 11839/19638 cut-off events. [2023-08-30 15:27:15,467 INFO L131 PetriNetUnfolder]: For 342346/342346 co-relation queries the response was YES. [2023-08-30 15:27:15,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150342 conditions, 19638 events. 11839/19638 cut-off events. For 342346/342346 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 148568 event pairs, 1170 based on Foata normal form. 192/19742 useless extension candidates. Maximal degree in co-relation 150165. Up to 14121 conditions per place. [2023-08-30 15:27:15,847 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 1770 selfloop transitions, 854 changer transitions 4/2628 dead transitions. [2023-08-30 15:27:15,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2628 transitions, 53163 flow [2023-08-30 15:27:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 15:27:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 15:27:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4836 transitions. [2023-08-30 15:27:15,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31504885993485343 [2023-08-30 15:27:15,850 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4836 transitions. [2023-08-30 15:27:15,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4836 transitions. [2023-08-30 15:27:15,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:15,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4836 transitions. [2023-08-30 15:27:15,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 96.72) internal successors, (4836), 50 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,860 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:15,861 INFO L175 Difference]: Start difference. First operand has 651 places, 2031 transitions, 36066 flow. Second operand 50 states and 4836 transitions. [2023-08-30 15:27:15,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2628 transitions, 53163 flow [2023-08-30 15:27:21,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 2628 transitions, 50216 flow, removed 1370 selfloop flow, removed 29 redundant places. [2023-08-30 15:27:21,615 INFO L231 Difference]: Finished difference. Result has 698 places, 2491 transitions, 47309 flow [2023-08-30 15:27:21,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=33531, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=47309, PETRI_PLACES=698, PETRI_TRANSITIONS=2491} [2023-08-30 15:27:21,616 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 668 predicate places. [2023-08-30 15:27:21,616 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 2491 transitions, 47309 flow [2023-08-30 15:27:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:21,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:21,617 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:27:21,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 15:27:21,832 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,SelfDestructingSolverStorable25 [2023-08-30 15:27:21,832 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:27:21,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 355266965, now seen corresponding path program 8 times [2023-08-30 15:27:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:21,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044682108] [2023-08-30 15:27:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:21,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:22,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044682108] [2023-08-30 15:27:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044682108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30558373] [2023-08-30 15:27:22,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:27:22,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:22,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:22,507 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) [2023-08-30 15:27:22,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 15:27:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:27:22,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:27:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:27:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:27:24,413 INFO L321 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2023-08-30 15:27:24,413 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 287 treesize of output 266 [2023-08-30 15:27:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30558373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:28,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2023-08-30 15:27:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077870801] [2023-08-30 15:27:28,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 15:27:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 15:27:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 15:27:31,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 307 [2023-08-30 15:27:31,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 2491 transitions, 47309 flow. Second operand has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:31,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:31,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 307 [2023-08-30 15:27:31,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:57,331 INFO L130 PetriNetUnfolder]: 17303/28550 cut-off events. [2023-08-30 15:27:57,331 INFO L131 PetriNetUnfolder]: For 660528/660528 co-relation queries the response was YES. [2023-08-30 15:27:57,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245074 conditions, 28550 events. 17303/28550 cut-off events. For 660528/660528 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 222184 event pairs, 1262 based on Foata normal form. 728/29218 useless extension candidates. Maximal degree in co-relation 244874. Up to 12393 conditions per place. [2023-08-30 15:27:57,849 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1303 selfloop transitions, 2699 changer transitions 9/4011 dead transitions. [2023-08-30 15:27:57,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 4011 transitions, 92286 flow [2023-08-30 15:27:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 15:27:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 15:27:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7666 transitions. [2023-08-30 15:27:57,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332942453854506 [2023-08-30 15:27:57,854 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7666 transitions. [2023-08-30 15:27:57,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7666 transitions. [2023-08-30 15:27:57,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:57,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7666 transitions. [2023-08-30 15:27:57,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 102.21333333333334) internal successors, (7666), 75 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:57,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:57,869 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:57,869 INFO L175 Difference]: Start difference. First operand has 698 places, 2491 transitions, 47309 flow. Second operand 75 states and 7666 transitions. [2023-08-30 15:27:57,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 4011 transitions, 92286 flow [2023-08-30 15:28:09,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 4011 transitions, 85749 flow, removed 2975 selfloop flow, removed 40 redundant places. [2023-08-30 15:28:09,516 INFO L231 Difference]: Finished difference. Result has 754 places, 3659 transitions, 84139 flow [2023-08-30 15:28:09,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=37711, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=84139, PETRI_PLACES=754, PETRI_TRANSITIONS=3659} [2023-08-30 15:28:09,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 724 predicate places. [2023-08-30 15:28:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 3659 transitions, 84139 flow [2023-08-30 15:28:09,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:09,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:09,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:09,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 15:28:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:09,725 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:28:09,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1511349299, now seen corresponding path program 9 times [2023-08-30 15:28:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411950954] [2023-08-30 15:28:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411950954] [2023-08-30 15:28:11,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411950954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367081770] [2023-08-30 15:28:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:28:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:11,132 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) [2023-08-30 15:28:11,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 15:28:11,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:28:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 15:28:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:28:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:12,545 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 15:28:12,546 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 220 [2023-08-30 15:28:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:28:13,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367081770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:13,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 28 [2023-08-30 15:28:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552321002] [2023-08-30 15:28:13,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:28:13,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:28:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-08-30 15:28:16,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 15:28:16,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 3659 transitions, 84139 flow. Second operand has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:16,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:16,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 15:28:16,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:54,542 INFO L130 PetriNetUnfolder]: 20807/34470 cut-off events. [2023-08-30 15:28:54,543 INFO L131 PetriNetUnfolder]: For 881826/881826 co-relation queries the response was YES. [2023-08-30 15:28:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313066 conditions, 34470 events. 20807/34470 cut-off events. For 881826/881826 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 277748 event pairs, 1596 based on Foata normal form. 500/34946 useless extension candidates. Maximal degree in co-relation 312848. Up to 19883 conditions per place. [2023-08-30 15:28:55,499 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 2817 selfloop transitions, 1860 changer transitions 15/4692 dead transitions. [2023-08-30 15:28:55,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 4692 transitions, 117053 flow [2023-08-30 15:28:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-30 15:28:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-30 15:28:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6453 transitions. [2023-08-30 15:28:55,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31847793899911164 [2023-08-30 15:28:55,504 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6453 transitions. [2023-08-30 15:28:55,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6453 transitions. [2023-08-30 15:28:55,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:55,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6453 transitions. [2023-08-30 15:28:55,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 97.77272727272727) internal successors, (6453), 66 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:55,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:55,517 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:55,517 INFO L175 Difference]: Start difference. First operand has 754 places, 3659 transitions, 84139 flow. Second operand 66 states and 6453 transitions. [2023-08-30 15:28:55,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 4692 transitions, 117053 flow [2023-08-30 15:29:24,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 4692 transitions, 100128 flow, removed 8310 selfloop flow, removed 20 redundant places. [2023-08-30 15:29:24,312 INFO L231 Difference]: Finished difference. Result has 814 places, 4373 transitions, 93599 flow [2023-08-30 15:29:24,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=69502, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2099, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=93599, PETRI_PLACES=814, PETRI_TRANSITIONS=4373} [2023-08-30 15:29:24,314 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 784 predicate places. [2023-08-30 15:29:24,314 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 4373 transitions, 93599 flow [2023-08-30 15:29:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:24,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:24,315 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:24,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 15:29:24,519 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,SelfDestructingSolverStorable27 [2023-08-30 15:29:24,520 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:29:24,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719912, now seen corresponding path program 9 times [2023-08-30 15:29:24,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:24,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67777107] [2023-08-30 15:29:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:25,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:25,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67777107] [2023-08-30 15:29:25,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67777107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:25,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774301372] [2023-08-30 15:29:25,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:29:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:25,863 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) [2023-08-30 15:29:25,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 15:29:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:29:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 15:29:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:29:26,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:27,774 INFO L321 Elim1Store]: treesize reduction 44, result has 74.0 percent of original size [2023-08-30 15:29:27,775 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 329 treesize of output 337 [2023-08-30 15:29:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:29:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774301372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:32,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:32,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 32 [2023-08-30 15:29:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329991948] [2023-08-30 15:29:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:29:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:29:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:29:36,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-08-30 15:29:36,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 4373 transitions, 93599 flow. Second operand has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:36,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:36,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-08-30 15:29:36,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:02,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:30:24,289 INFO L130 PetriNetUnfolder]: 22879/37930 cut-off events. [2023-08-30 15:30:24,289 INFO L131 PetriNetUnfolder]: For 766837/766837 co-relation queries the response was YES. [2023-08-30 15:30:26,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321491 conditions, 37930 events. 22879/37930 cut-off events. For 766837/766837 co-relation queries the response was YES. Maximal size of possible extension queue 2037. Compared 310307 event pairs, 2200 based on Foata normal form. 88/37990 useless extension candidates. Maximal degree in co-relation 321257. Up to 28027 conditions per place. [2023-08-30 15:30:26,713 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 3859 selfloop transitions, 1108 changer transitions 12/4979 dead transitions. [2023-08-30 15:30:26,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 4979 transitions, 116404 flow [2023-08-30 15:30:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 15:30:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 15:30:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5210 transitions. [2023-08-30 15:30:26,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33275851057035194 [2023-08-30 15:30:26,720 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5210 transitions. [2023-08-30 15:30:26,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5210 transitions. [2023-08-30 15:30:26,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:30:26,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5210 transitions. [2023-08-30 15:30:26,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 102.15686274509804) internal successors, (5210), 51 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:26,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:26,732 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:26,732 INFO L175 Difference]: Start difference. First operand has 814 places, 4373 transitions, 93599 flow. Second operand 51 states and 5210 transitions. [2023-08-30 15:30:26,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 4979 transitions, 116404 flow [2023-08-30 15:30:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 4979 transitions, 111645 flow, removed 1867 selfloop flow, removed 31 redundant places. [2023-08-30 15:30:55,245 INFO L231 Difference]: Finished difference. Result has 846 places, 4708 transitions, 101868 flow [2023-08-30 15:30:55,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=89444, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=101868, PETRI_PLACES=846, PETRI_TRANSITIONS=4708} [2023-08-30 15:30:55,250 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 816 predicate places. [2023-08-30 15:30:55,250 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 4708 transitions, 101868 flow [2023-08-30 15:30:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:30:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:55,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 15:30:55,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 15:30:55,455 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:30:55,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2114439413, now seen corresponding path program 10 times [2023-08-30 15:30:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:55,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928296419] [2023-08-30 15:30:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:55,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:30:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928296419] [2023-08-30 15:30:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928296419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94757555] [2023-08-30 15:30:57,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:30:57,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:57,573 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) [2023-08-30 15:30:57,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 15:30:57,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:30:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:30:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:30:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:30:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:30:58,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:30:59,326 INFO L321 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2023-08-30 15:30:59,327 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 288 treesize of output 270 [2023-08-30 15:31:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 15:31:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94757555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:31:00,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:31:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 39 [2023-08-30 15:31:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151964632] [2023-08-30 15:31:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:31:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 15:31:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:31:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 15:31:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 15:31:04,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-08-30 15:31:04,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 4708 transitions, 101868 flow. Second operand has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:04,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:31:04,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-08-30 15:31:04,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:31:55,503 INFO L130 PetriNetUnfolder]: 25525/42440 cut-off events. [2023-08-30 15:31:55,504 INFO L131 PetriNetUnfolder]: For 872603/872603 co-relation queries the response was YES. [2023-08-30 15:31:56,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361176 conditions, 42440 events. 25525/42440 cut-off events. For 872603/872603 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 352862 event pairs, 2278 based on Foata normal form. 60/42472 useless extension candidates. Maximal degree in co-relation 360933. Up to 29413 conditions per place. [2023-08-30 15:31:57,239 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 4017 selfloop transitions, 1419 changer transitions 23/5459 dead transitions. [2023-08-30 15:31:57,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 5459 transitions, 128873 flow [2023-08-30 15:31:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 15:31:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 15:31:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5933 transitions. [2023-08-30 15:31:57,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3168152934266033 [2023-08-30 15:31:57,244 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5933 transitions. [2023-08-30 15:31:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5933 transitions. [2023-08-30 15:31:57,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:31:57,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5933 transitions. [2023-08-30 15:31:57,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 97.26229508196721) internal successors, (5933), 61 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:57,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:57,258 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:57,259 INFO L175 Difference]: Start difference. First operand has 846 places, 4708 transitions, 101868 flow. Second operand 61 states and 5933 transitions. [2023-08-30 15:31:57,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 5459 transitions, 128873 flow [2023-08-30 15:32:32,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 888 places, 5459 transitions, 127060 flow, removed 862 selfloop flow, removed 18 redundant places. [2023-08-30 15:32:32,210 INFO L231 Difference]: Finished difference. Result has 901 places, 5122 transitions, 115869 flow [2023-08-30 15:32:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100303, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=115869, PETRI_PLACES=901, PETRI_TRANSITIONS=5122} [2023-08-30 15:32:32,213 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 871 predicate places. [2023-08-30 15:32:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 5122 transitions, 115869 flow [2023-08-30 15:32:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:32,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:32:32,214 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:32:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 15:32:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:32,423 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:32:32,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:32:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 241348892, now seen corresponding path program 10 times [2023-08-30 15:32:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:32:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295172113] [2023-08-30 15:32:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:32:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:33,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:32:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295172113] [2023-08-30 15:32:33,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295172113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057718213] [2023-08-30 15:32:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:32:33,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:33,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:32:33,661 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) [2023-08-30 15:32:33,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 15:32:33,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:32:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:32:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 15:32:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:32:33,840 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 [2023-08-30 15:32:33,920 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 15:32:33,921 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 [2023-08-30 15:32:34,007 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 15:32:34,010 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 [2023-08-30 15:32:34,097 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 15:32:34,101 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 [2023-08-30 15:32:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:34,225 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 [2023-08-30 15:32:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:32:34,308 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 [2023-08-30 15:32:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:35,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:32:38,032 INFO L321 Elim1Store]: treesize reduction 112, result has 40.4 percent of original size [2023-08-30 15:32:38,033 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 366 treesize of output 210 [2023-08-30 15:32:38,483 INFO L321 Elim1Store]: treesize reduction 10, result has 96.9 percent of original size [2023-08-30 15:32:38,483 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 1135 treesize of output 1297 [2023-08-30 15:32:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:32:38,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:32:38,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 391 treesize of output 430 [2023-08-30 15:32:38,914 INFO L321 Elim1Store]: treesize reduction 10, result has 89.7 percent of original size [2023-08-30 15:32:38,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 369 treesize of output 361 Killed by 15