./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --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 15:18:04,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:18:04,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:18:04,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:18:04,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:18:04,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:18:04,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:18:04,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:18:04,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:18:04,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:18:04,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:18:04,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:18:04,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:18:04,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:18:04,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:18:04,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:18:04,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:18:04,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:18:04,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:18:04,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:18:04,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:18:04,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:18:04,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:18:04,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:18:04,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:18:04,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:18:04,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:18:04,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:18:04,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:18:04,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:18:04,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:18:04,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:18:04,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:18:04,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:18:04,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:18:04,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:18:04,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:18:04,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:18:04,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:18:04,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:18:04,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:18:04,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:18:04,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:18:04,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:18:04,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:18:04,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:18:04,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:18:04,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:18:04,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:18:04,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:18:04,291 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:18:04,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:18:04,291 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:18:04,292 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:18:04,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:18:04,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:18:04,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:18:04,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:18:04,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:18:04,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:18:04,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:18:04,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:18:04,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:18:04,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:18:04,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:18:04,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:18:04,296 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:18:04,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:18:04,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:18:04,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:18:04,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:18:04,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:18:04,534 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:18:04,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 15:18:05,484 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:18:05,655 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:18:05,656 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-30 15:18:05,662 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f47e230a7/0846eccb375346dc861c4707946c419c/FLAG865e5ab8c [2023-08-30 15:18:05,672 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f47e230a7/0846eccb375346dc861c4707946c419c [2023-08-30 15:18:05,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:18:05,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:18:05,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:18:05,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:18:05,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:18:05,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f4e680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05, skipping insertion in model container [2023-08-30 15:18:05,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:18:05,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:18:05,814 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 15:18:05,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:18:05,835 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:18:05,860 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-bad-counter-queue2.wvr.c[2271,2284] [2023-08-30 15:18:05,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:18:05,877 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:18:05,879 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:18:05,883 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:18:05,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05 WrapperNode [2023-08-30 15:18:05,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:18:05,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:18:05,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:18:05,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:18:05,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,928 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 174 [2023-08-30 15:18:05,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:18:05,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:18:05,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:18:05,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:18:05,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:18:05,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:18:05,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:18:05,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:18:05,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (1/1) ... [2023-08-30 15:18:05,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:18:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:05,994 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 15:18:06,010 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 15:18:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:18:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:18:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:18:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:18:06,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:18:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:18:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:18:06,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:18:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:18:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:18:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:18:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:18:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:18:06,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:18:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:18:06,028 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 15:18:06,089 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:18:06,091 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:18:06,308 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:18:06,525 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:18:06,525 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:18:06,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:18:06 BoogieIcfgContainer [2023-08-30 15:18:06,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:18:06,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:18:06,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:18:06,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:18:06,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:18:05" (1/3) ... [2023-08-30 15:18:06,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f37fe65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:18:06, skipping insertion in model container [2023-08-30 15:18:06,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:18:05" (2/3) ... [2023-08-30 15:18:06,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f37fe65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:18:06, skipping insertion in model container [2023-08-30 15:18:06,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:18:06" (3/3) ... [2023-08-30 15:18:06,532 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-30 15:18:06,537 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:18:06,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:18:06,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 15:18:06,544 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:18:06,641 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:18:06,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 278 flow [2023-08-30 15:18:06,720 INFO L130 PetriNetUnfolder]: 9/129 cut-off events. [2023-08-30 15:18:06,722 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:18:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 9/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-30 15:18:06,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 131 transitions, 278 flow [2023-08-30 15:18:06,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 113 transitions, 235 flow [2023-08-30 15:18:06,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:18:06,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 113 transitions, 235 flow [2023-08-30 15:18:06,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 113 transitions, 235 flow [2023-08-30 15:18:06,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 113 transitions, 235 flow [2023-08-30 15:18:06,774 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2023-08-30 15:18:06,774 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:18:06,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 113 events. 8/113 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 160 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-30 15:18:06,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-08-30 15:18:14,172 INFO L134 LiptonReduction]: Checked pairs total: 1701 [2023-08-30 15:18:14,172 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-30 15:18:14,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:18:14,185 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;@73eb509e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:18:14,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 15:18:14,187 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:18:14,187 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:18:14,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:14,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:18:14,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:14,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 22705, now seen corresponding path program 1 times [2023-08-30 15:18:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:14,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558583002] [2023-08-30 15:18:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:14,417 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 15:18:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558583002] [2023-08-30 15:18:14,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558583002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:14,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:14,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:18:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045028611] [2023-08-30 15:18:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 15:18:14,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 15:18:14,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:14,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 15:18:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:14,731 INFO L130 PetriNetUnfolder]: 929/1331 cut-off events. [2023-08-30 15:18:14,731 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 15:18:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1331 events. 929/1331 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 6757 event pairs, 444 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 1230. Up to 658 conditions per place. [2023-08-30 15:18:14,742 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 15:18:14,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 226 flow [2023-08-30 15:18:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-30 15:18:14,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4993252361673414 [2023-08-30 15:18:14,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-30 15:18:14,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-30 15:18:14,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:14,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-30 15:18:14,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 15:18:14,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:14,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:14,769 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 75 flow. Second operand 3 states and 370 transitions. [2023-08-30 15:18:14,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 226 flow [2023-08-30 15:18:14,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:14,776 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2023-08-30 15:18:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-30 15:18:14,780 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 15:18:14,780 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2023-08-30 15:18:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 15:18:14,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:14,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:18:14,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:18:14,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:14,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 704550, now seen corresponding path program 1 times [2023-08-30 15:18:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:14,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325016895] [2023-08-30 15:18:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:14,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325016895] [2023-08-30 15:18:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325016895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:14,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:18:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922688619] [2023-08-30 15:18:14,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:14,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:14,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 15:18:14,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 15:18:14,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:14,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 15:18:14,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:15,026 INFO L130 PetriNetUnfolder]: 929/1330 cut-off events. [2023-08-30 15:18:15,026 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:18:15,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2687 conditions, 1330 events. 929/1330 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 6721 event pairs, 444 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 1341. Up to 1310 conditions per place. [2023-08-30 15:18:15,031 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 15:18:15,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 126 flow [2023-08-30 15:18:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-30 15:18:15,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534412955465587 [2023-08-30 15:18:15,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-30 15:18:15,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-30 15:18:15,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:15,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-30 15:18:15,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 15:18:15,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:15,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:15,037 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 3 states and 336 transitions. [2023-08-30 15:18:15,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 126 flow [2023-08-30 15:18:15,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:15,038 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 72 flow [2023-08-30 15:18:15,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-30 15:18:15,038 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 15:18:15,038 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 72 flow [2023-08-30 15:18:15,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 15:18:15,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:15,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:18:15,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:18:15,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:15,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:15,041 INFO L85 PathProgramCache]: Analyzing trace with hash 704552, now seen corresponding path program 1 times [2023-08-30 15:18:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278356075] [2023-08-30 15:18:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:15,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:15,094 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 15:18:15,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278356075] [2023-08-30 15:18:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278356075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021536586] [2023-08-30 15:18:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:15,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:15,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:15,098 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 15:18:15,115 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 15:18:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:18:15,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:15,223 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 15:18:15,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:15,233 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 15:18:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021536586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:15,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:18:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950677801] [2023-08-30 15:18:15,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:15,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:18:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:18:15,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:18:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 247 [2023-08-30 15:18:15,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 15:18:15,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:15,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 247 [2023-08-30 15:18:15,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:15,744 INFO L130 PetriNetUnfolder]: 2321/3322 cut-off events. [2023-08-30 15:18:15,745 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 15:18:15,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6701 conditions, 3322 events. 2321/3322 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 18330 event pairs, 1110 based on Foata normal form. 0/932 useless extension candidates. Maximal degree in co-relation 6693. Up to 657 conditions per place. [2023-08-30 15:18:15,757 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 117 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2023-08-30 15:18:15,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 124 transitions, 528 flow [2023-08-30 15:18:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:18:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:18:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 743 transitions. [2023-08-30 15:18:15,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013495276653172 [2023-08-30 15:18:15,759 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 743 transitions. [2023-08-30 15:18:15,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 743 transitions. [2023-08-30 15:18:15,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:15,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 743 transitions. [2023-08-30 15:18:15,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.83333333333333) internal successors, (743), 6 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:15,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states 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 15:18:15,763 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states 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 15:18:15,763 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 72 flow. Second operand 6 states and 743 transitions. [2023-08-30 15:18:15,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 124 transitions, 528 flow [2023-08-30 15:18:15,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 124 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:15,765 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 107 flow [2023-08-30 15:18:15,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-30 15:18:15,766 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-30 15:18:15,766 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 107 flow [2023-08-30 15:18:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 15:18:15,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:15,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:18:15,773 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 15:18:15,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:15,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:15,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 677138257, now seen corresponding path program 1 times [2023-08-30 15:18:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:15,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45825195] [2023-08-30 15:18:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:16,040 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 15:18:16,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45825195] [2023-08-30 15:18:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45825195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:16,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:16,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211615359] [2023-08-30 15:18:16,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:16,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:18:16,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:18:16,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:18:16,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2023-08-30 15:18:16,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 15:18:16,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:16,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2023-08-30 15:18:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:16,386 INFO L130 PetriNetUnfolder]: 1474/2347 cut-off events. [2023-08-30 15:18:16,387 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 15:18:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4767 conditions, 2347 events. 1474/2347 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 14155 event pairs, 899 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 4755. Up to 2123 conditions per place. [2023-08-30 15:18:16,395 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 51 selfloop transitions, 4 changer transitions 2/58 dead transitions. [2023-08-30 15:18:16,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 279 flow [2023-08-30 15:18:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-08-30 15:18:16,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437246963562753 [2023-08-30 15:18:16,396 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-08-30 15:18:16,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-08-30 15:18:16,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:16,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-08-30 15:18:16,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 15:18:16,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 15:18:16,400 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 15:18:16,400 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 107 flow. Second operand 5 states and 548 transitions. [2023-08-30 15:18:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 279 flow [2023-08-30 15:18:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:16,403 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 139 flow [2023-08-30 15:18:16,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-30 15:18:16,404 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 15:18:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 139 flow [2023-08-30 15:18:16,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 15:18:16,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:16,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:18:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:18:16,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:16,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash -484853788, now seen corresponding path program 1 times [2023-08-30 15:18:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452132164] [2023-08-30 15:18:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:16,452 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 15:18:16,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452132164] [2023-08-30 15:18:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452132164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:16,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:18:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712615181] [2023-08-30 15:18:16,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:16,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:16,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:18:16,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:18:16,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:16,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:18:16,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:16,844 INFO L130 PetriNetUnfolder]: 2858/4283 cut-off events. [2023-08-30 15:18:16,844 INFO L131 PetriNetUnfolder]: For 602/617 co-relation queries the response was YES. [2023-08-30 15:18:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10294 conditions, 4283 events. 2858/4283 cut-off events. For 602/617 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 27782 event pairs, 947 based on Foata normal form. 2/1818 useless extension candidates. Maximal degree in co-relation 10278. Up to 2412 conditions per place. [2023-08-30 15:18:16,860 INFO L137 encePairwiseOnDemand]: 243/247 looper letters, 49 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-30 15:18:16,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 298 flow [2023-08-30 15:18:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-30 15:18:16,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48582995951417 [2023-08-30 15:18:16,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-30 15:18:16,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-30 15:18:16,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:16,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-30 15:18:16,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 15:18:16,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:16,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:16,864 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 139 flow. Second operand 3 states and 360 transitions. [2023-08-30 15:18:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 298 flow [2023-08-30 15:18:16,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 292 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 15:18:16,866 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 152 flow [2023-08-30 15:18:16,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-30 15:18:16,867 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-08-30 15:18:16,867 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 152 flow [2023-08-30 15:18:16,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:18:16,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:16,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:18:16,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:18:16,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:16,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash -484853827, now seen corresponding path program 1 times [2023-08-30 15:18:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315380192] [2023-08-30 15:18:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:16,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:17,012 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 15:18:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:17,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315380192] [2023-08-30 15:18:17,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315380192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:17,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919570751] [2023-08-30 15:18:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:17,014 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 15:18:17,042 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 15:18:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:18:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:17,130 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 15:18:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:17,154 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 15:18:17,165 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 15:18:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:17,191 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296)) is different from false [2023-08-30 15:18:17,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:17,207 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 22 treesize of output 23 [2023-08-30 15:18:17,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:17,215 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 33 treesize of output 29 [2023-08-30 15:18:17,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-08-30 15:18:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 15:18:17,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919570751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:17,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:17,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 15:18:17,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614803552] [2023-08-30 15:18:17,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:17,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:18:17,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:18:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 15:18:17,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:18:17,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 152 flow. Second operand has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 15:18:17,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:17,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:18:17,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:17,960 INFO L130 PetriNetUnfolder]: 3167/5196 cut-off events. [2023-08-30 15:18:17,961 INFO L131 PetriNetUnfolder]: For 1803/1803 co-relation queries the response was YES. [2023-08-30 15:18:17,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12741 conditions, 5196 events. 3167/5196 cut-off events. For 1803/1803 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 39307 event pairs, 684 based on Foata normal form. 0/2447 useless extension candidates. Maximal degree in co-relation 12725. Up to 2977 conditions per place. [2023-08-30 15:18:17,980 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 55 selfloop transitions, 18 changer transitions 1/75 dead transitions. [2023-08-30 15:18:17,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 426 flow [2023-08-30 15:18:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:18:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:18:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 711 transitions. [2023-08-30 15:18:17,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598178137651822 [2023-08-30 15:18:17,982 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 711 transitions. [2023-08-30 15:18:17,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 711 transitions. [2023-08-30 15:18:17,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:17,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 711 transitions. [2023-08-30 15:18:17,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 15:18:17,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:18:17,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:18:17,986 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 152 flow. Second operand 8 states and 711 transitions. [2023-08-30 15:18:17,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 426 flow [2023-08-30 15:18:17,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:17,989 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 265 flow [2023-08-30 15:18:17,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-30 15:18:17,989 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 15:18:17,989 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 265 flow [2023-08-30 15:18:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 15:18:17,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:17,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:18:17,996 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 15:18:18,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 15:18:18,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:18,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash -484853828, now seen corresponding path program 1 times [2023-08-30 15:18:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:18,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831292969] [2023-08-30 15:18:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:18,369 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 15:18:18,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831292969] [2023-08-30 15:18:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831292969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567924137] [2023-08-30 15:18:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:18,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:18,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:18,371 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 15:18:18,373 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 15:18:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:18:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:18,476 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 15:18:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:18,505 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 15:18:18,514 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 15:18:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:18,540 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_132 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2023-08-30 15:18:18,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:18,552 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 24 treesize of output 25 [2023-08-30 15:18:18,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:18,560 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 39 treesize of output 35 [2023-08-30 15:18:18,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 5 [2023-08-30 15:18:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 15:18:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567924137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 15:18:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288143791] [2023-08-30 15:18:18,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:18,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:18:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:18:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-30 15:18:18,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:18:18,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 265 flow. Second operand has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 15:18:18,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:18,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:18:18,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:19,206 INFO L130 PetriNetUnfolder]: 3315/5340 cut-off events. [2023-08-30 15:18:19,206 INFO L131 PetriNetUnfolder]: For 2812/2820 co-relation queries the response was YES. [2023-08-30 15:18:19,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14068 conditions, 5340 events. 3315/5340 cut-off events. For 2812/2820 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 39927 event pairs, 980 based on Foata normal form. 0/2707 useless extension candidates. Maximal degree in co-relation 14049. Up to 3129 conditions per place. [2023-08-30 15:18:19,224 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 54 selfloop transitions, 20 changer transitions 1/76 dead transitions. [2023-08-30 15:18:19,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 490 flow [2023-08-30 15:18:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:18:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:18:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2023-08-30 15:18:19,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35931174089068824 [2023-08-30 15:18:19,226 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2023-08-30 15:18:19,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2023-08-30 15:18:19,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:19,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2023-08-30 15:18:19,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 15:18:19,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:18:19,230 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:18:19,230 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 265 flow. Second operand 8 states and 710 transitions. [2023-08-30 15:18:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 490 flow [2023-08-30 15:18:19,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 477 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:19,234 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 301 flow [2023-08-30 15:18:19,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-08-30 15:18:19,235 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2023-08-30 15:18:19,235 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 301 flow [2023-08-30 15:18:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.25) internal successors, (975), 12 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 15:18:19,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:19,236 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:18:19,240 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 15:18:19,440 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 15:18:19,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:19,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -484897293, now seen corresponding path program 2 times [2023-08-30 15:18:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:19,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385896044] [2023-08-30 15:18:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:19,493 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 15:18:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385896044] [2023-08-30 15:18:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385896044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902571933] [2023-08-30 15:18:19,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:19,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:19,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:19,494 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 15:18:19,496 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 15:18:19,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:18:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:18:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:19,579 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 15:18:19,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:18:19,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902571933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:19,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:18:19,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:18:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905254931] [2023-08-30 15:18:19,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:19,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:19,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:19,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:19,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:18:19,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:18:19,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 15:18:19,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:19,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:18:19,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:20,053 INFO L130 PetriNetUnfolder]: 3101/5108 cut-off events. [2023-08-30 15:18:20,054 INFO L131 PetriNetUnfolder]: For 4079/4114 co-relation queries the response was YES. [2023-08-30 15:18:20,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13905 conditions, 5108 events. 3101/5108 cut-off events. For 4079/4114 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 39105 event pairs, 1678 based on Foata normal form. 35/2661 useless extension candidates. Maximal degree in co-relation 13885. Up to 5041 conditions per place. [2023-08-30 15:18:20,072 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 44 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 15:18:20,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 381 flow [2023-08-30 15:18:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 15:18:20,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-30 15:18:20,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 15:18:20,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 15:18:20,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:20,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 15:18:20,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 15:18:20,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:20,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:20,076 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 301 flow. Second operand 3 states and 338 transitions. [2023-08-30 15:18:20,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 381 flow [2023-08-30 15:18:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 362 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:20,080 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 274 flow [2023-08-30 15:18:20,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 15:18:20,081 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-08-30 15:18:20,081 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 274 flow [2023-08-30 15:18:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 15:18:20,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:20,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:18:20,088 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 15:18:20,285 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 15:18:20,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:20,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash -484853824, now seen corresponding path program 1 times [2023-08-30 15:18:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:20,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401994912] [2023-08-30 15:18:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:20,320 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 15:18:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401994912] [2023-08-30 15:18:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401994912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:20,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:20,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:18:20,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310896982] [2023-08-30 15:18:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:20,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 15:18:20,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:18:20,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:20,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 15:18:20,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:20,718 INFO L130 PetriNetUnfolder]: 2992/4991 cut-off events. [2023-08-30 15:18:20,719 INFO L131 PetriNetUnfolder]: For 3813/3863 co-relation queries the response was YES. [2023-08-30 15:18:20,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13834 conditions, 4991 events. 2992/4991 cut-off events. For 3813/3863 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 36959 event pairs, 777 based on Foata normal form. 89/2898 useless extension candidates. Maximal degree in co-relation 13817. Up to 4473 conditions per place. [2023-08-30 15:18:20,735 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 52 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-30 15:18:20,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 440 flow [2023-08-30 15:18:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-30 15:18:20,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844804318488529 [2023-08-30 15:18:20,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-30 15:18:20,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-30 15:18:20,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:20,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-30 15:18:20,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 15:18:20,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:20,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:20,740 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 274 flow. Second operand 3 states and 359 transitions. [2023-08-30 15:18:20,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 440 flow [2023-08-30 15:18:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:20,743 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 317 flow [2023-08-30 15:18:20,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 15:18:20,744 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2023-08-30 15:18:20,744 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 317 flow [2023-08-30 15:18:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:18:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:20,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:18:20,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:20,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564433, now seen corresponding path program 1 times [2023-08-30 15:18:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773633891] [2023-08-30 15:18:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:20,817 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 15:18:20,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773633891] [2023-08-30 15:18:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773633891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538251581] [2023-08-30 15:18:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:20,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:20,819 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 15:18:20,821 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 15:18:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:18:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:20,941 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 15:18:20,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:20,973 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 15:18:20,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538251581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:20,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:20,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 15:18:20,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365607503] [2023-08-30 15:18:20,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:18:20,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:20,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:18:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:18:21,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:18:21,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 317 flow. Second operand has 14 states, 14 states have (on average 95.28571428571429) internal successors, (1334), 14 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states 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 15:18:21,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:21,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:18:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:21,656 INFO L130 PetriNetUnfolder]: 2639/4402 cut-off events. [2023-08-30 15:18:21,657 INFO L131 PetriNetUnfolder]: For 6292/6295 co-relation queries the response was YES. [2023-08-30 15:18:21,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14128 conditions, 4402 events. 2639/4402 cut-off events. For 6292/6295 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 32386 event pairs, 1151 based on Foata normal form. 125/2976 useless extension candidates. Maximal degree in co-relation 14109. Up to 2924 conditions per place. [2023-08-30 15:18:21,673 INFO L137 encePairwiseOnDemand]: 234/247 looper letters, 147 selfloop transitions, 14 changer transitions 6/168 dead transitions. [2023-08-30 15:18:21,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 168 transitions, 1126 flow [2023-08-30 15:18:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:18:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:18:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1268 transitions. [2023-08-30 15:18:21,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42780026990553305 [2023-08-30 15:18:21,676 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1268 transitions. [2023-08-30 15:18:21,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1268 transitions. [2023-08-30 15:18:21,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:21,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1268 transitions. [2023-08-30 15:18:21,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 15:18:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:21,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:21,682 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 317 flow. Second operand 12 states and 1268 transitions. [2023-08-30 15:18:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 168 transitions, 1126 flow [2023-08-30 15:18:21,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 168 transitions, 1103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:21,690 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 469 flow [2023-08-30 15:18:21,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=469, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-30 15:18:21,691 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2023-08-30 15:18:21,691 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 469 flow [2023-08-30 15:18:21,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.28571428571429) internal successors, (1334), 14 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states 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 15:18:21,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:21,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:21,698 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 15:18:21,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 15:18:21,898 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:21,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:21,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564715, now seen corresponding path program 1 times [2023-08-30 15:18:21,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:21,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534158824] [2023-08-30 15:18:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:21,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:22,081 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 15:18:22,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534158824] [2023-08-30 15:18:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534158824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617892921] [2023-08-30 15:18:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:22,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:22,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:22,083 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 15:18:22,085 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 15:18:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:22,183 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 15:18:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:22,204 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 15:18:22,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:22,241 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 15:18:22,243 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 15:18:22,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:22,270 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_243 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_243) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2023-08-30 15:18:22,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:22,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-08-30 15:18:22,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:22,313 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 125 treesize of output 117 [2023-08-30 15:18:22,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 15:18:22,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 21 [2023-08-30 15:18:22,347 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 15:18:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617892921] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:22,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 15:18:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386521261] [2023-08-30 15:18:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:18:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:18:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=161, Unknown=6, NotChecked=26, Total=240 [2023-08-30 15:18:22,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:22,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 469 flow. Second operand has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 15:18:22,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:22,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:23,040 INFO L130 PetriNetUnfolder]: 2487/4149 cut-off events. [2023-08-30 15:18:23,040 INFO L131 PetriNetUnfolder]: For 11270/11270 co-relation queries the response was YES. [2023-08-30 15:18:23,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15086 conditions, 4149 events. 2487/4149 cut-off events. For 11270/11270 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 29956 event pairs, 659 based on Foata normal form. 98/2751 useless extension candidates. Maximal degree in co-relation 15061. Up to 1598 conditions per place. [2023-08-30 15:18:23,061 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 77 selfloop transitions, 24 changer transitions 1/103 dead transitions. [2023-08-30 15:18:23,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 868 flow [2023-08-30 15:18:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-08-30 15:18:23,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3539618276460382 [2023-08-30 15:18:23,063 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-08-30 15:18:23,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-08-30 15:18:23,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:23,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-08-30 15:18:23,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 15:18:23,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:23,066 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:23,066 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 469 flow. Second operand 7 states and 612 transitions. [2023-08-30 15:18:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 868 flow [2023-08-30 15:18:23,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 857 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:23,083 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 578 flow [2023-08-30 15:18:23,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2023-08-30 15:18:23,084 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2023-08-30 15:18:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 578 flow [2023-08-30 15:18:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 15:18:23,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:23,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:23,089 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 15:18:23,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:23,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:23,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2101168166, now seen corresponding path program 1 times [2023-08-30 15:18:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867396586] [2023-08-30 15:18:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:23,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:23,356 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 15:18:23,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867396586] [2023-08-30 15:18:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867396586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:23,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:23,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:18:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048572904] [2023-08-30 15:18:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:18:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:18:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:18:23,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2023-08-30 15:18:23,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 15:18:23,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:23,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2023-08-30 15:18:23,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:23,738 INFO L130 PetriNetUnfolder]: 1836/3387 cut-off events. [2023-08-30 15:18:23,738 INFO L131 PetriNetUnfolder]: For 15588/15938 co-relation queries the response was YES. [2023-08-30 15:18:23,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 3387 events. 1836/3387 cut-off events. For 15588/15938 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 24929 event pairs, 1412 based on Foata normal form. 332/2683 useless extension candidates. Maximal degree in co-relation 13504. Up to 3334 conditions per place. [2023-08-30 15:18:23,752 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 53 selfloop transitions, 2 changer transitions 15/74 dead transitions. [2023-08-30 15:18:23,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 745 flow [2023-08-30 15:18:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:18:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:18:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 530 transitions. [2023-08-30 15:18:23,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291497975708502 [2023-08-30 15:18:23,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 530 transitions. [2023-08-30 15:18:23,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 530 transitions. [2023-08-30 15:18:23,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:23,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 530 transitions. [2023-08-30 15:18:23,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 15:18:23,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 15:18:23,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 15:18:23,757 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 578 flow. Second operand 5 states and 530 transitions. [2023-08-30 15:18:23,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 745 flow [2023-08-30 15:18:23,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 726 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:23,767 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 552 flow [2023-08-30 15:18:23,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-08-30 15:18:23,768 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2023-08-30 15:18:23,768 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 552 flow [2023-08-30 15:18:23,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 15:18:23,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:23,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:23,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 15:18:23,769 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:23,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2145564716, now seen corresponding path program 1 times [2023-08-30 15:18:23,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:23,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613284189] [2023-08-30 15:18:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:23,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:23,901 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 15:18:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613284189] [2023-08-30 15:18:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613284189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435988647] [2023-08-30 15:18:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:23,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:23,903 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 15:18:23,905 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 15:18:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:24,008 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 15:18:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:24,031 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 15:18:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:24,068 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 15:18:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:24,084 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 9223372039002259456))) is different from false [2023-08-30 15:18:24,087 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2023-08-30 15:18:24,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:24,123 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 27 treesize of output 28 [2023-08-30 15:18:24,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:24,128 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 73 treesize of output 69 [2023-08-30 15:18:24,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 56 treesize of output 52 [2023-08-30 15:18:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 24 [2023-08-30 15:18:24,168 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 15:18:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435988647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:24,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:24,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 15:18:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190564233] [2023-08-30 15:18:24,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:18:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:18:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=139, Unknown=6, NotChecked=50, Total=240 [2023-08-30 15:18:24,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:24,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 552 flow. Second operand has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 15:18:24,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:24,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:24,664 INFO L130 PetriNetUnfolder]: 2216/3683 cut-off events. [2023-08-30 15:18:24,665 INFO L131 PetriNetUnfolder]: For 12528/12528 co-relation queries the response was YES. [2023-08-30 15:18:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 3683 events. 2216/3683 cut-off events. For 12528/12528 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 26226 event pairs, 531 based on Foata normal form. 98/2666 useless extension candidates. Maximal degree in co-relation 15095. Up to 1490 conditions per place. [2023-08-30 15:18:24,680 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 59 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2023-08-30 15:18:24,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 839 flow [2023-08-30 15:18:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2023-08-30 15:18:24,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441295546558704 [2023-08-30 15:18:24,682 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2023-08-30 15:18:24,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2023-08-30 15:18:24,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:24,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2023-08-30 15:18:24,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 15:18:24,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:24,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:24,685 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 552 flow. Second operand 7 states and 595 transitions. [2023-08-30 15:18:24,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 839 flow [2023-08-30 15:18:24,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 787 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-30 15:18:24,712 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 558 flow [2023-08-30 15:18:24,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-30 15:18:24,712 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2023-08-30 15:18:24,712 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 558 flow [2023-08-30 15:18:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 78.25) internal successors, (1252), 16 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 15:18:24,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:24,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:24,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 15:18:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:24,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:24,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2084064891, now seen corresponding path program 1 times [2023-08-30 15:18:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741819819] [2023-08-30 15:18:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:25,078 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 15:18:25,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:25,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741819819] [2023-08-30 15:18:25,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741819819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368847090] [2023-08-30 15:18:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:25,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:25,080 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 15:18:25,081 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 15:18:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:25,178 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 15:18:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:25,206 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 15:18:25,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:25,231 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 15:18:25,249 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 15:18:25,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:25,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:25,315 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 27 treesize of output 28 [2023-08-30 15:18:25,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:25,320 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 73 treesize of output 69 [2023-08-30 15:18:25,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 26 [2023-08-30 15:18:25,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 50 [2023-08-30 15:18:25,372 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 15:18:25,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368847090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:25,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:25,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 15:18:25,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200028177] [2023-08-30 15:18:25,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:25,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:18:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:18:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=188, Unknown=3, NotChecked=0, Total=240 [2023-08-30 15:18:25,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 247 [2023-08-30 15:18:25,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 558 flow. Second operand has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states 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 15:18:25,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:25,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 247 [2023-08-30 15:18:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:26,014 INFO L130 PetriNetUnfolder]: 2065/3918 cut-off events. [2023-08-30 15:18:26,014 INFO L131 PetriNetUnfolder]: For 18619/19041 co-relation queries the response was YES. [2023-08-30 15:18:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15559 conditions, 3918 events. 2065/3918 cut-off events. For 18619/19041 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 31414 event pairs, 478 based on Foata normal form. 530/3202 useless extension candidates. Maximal degree in co-relation 15533. Up to 1440 conditions per place. [2023-08-30 15:18:26,028 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 77 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2023-08-30 15:18:26,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 1070 flow [2023-08-30 15:18:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2023-08-30 15:18:26,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38114517061885483 [2023-08-30 15:18:26,030 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2023-08-30 15:18:26,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2023-08-30 15:18:26,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:26,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2023-08-30 15:18:26,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 15:18:26,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:26,034 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:26,034 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 558 flow. Second operand 7 states and 659 transitions. [2023-08-30 15:18:26,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 1070 flow [2023-08-30 15:18:26,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 1030 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 15:18:26,047 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 577 flow [2023-08-30 15:18:26,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-30 15:18:26,048 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2023-08-30 15:18:26,048 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 577 flow [2023-08-30 15:18:26,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states 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 15:18:26,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:26,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:26,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 15:18:26,252 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,SelfDestructingSolverStorable13 [2023-08-30 15:18:26,252 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:26,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461162, now seen corresponding path program 1 times [2023-08-30 15:18:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:26,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980606353] [2023-08-30 15:18:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:26,483 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 15:18:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980606353] [2023-08-30 15:18:26,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980606353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851474715] [2023-08-30 15:18:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:26,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:26,486 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 15:18:26,488 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 15:18:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:18:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:26,601 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 15:18:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:26,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:18:26,646 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 15:18:26,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:26,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:26,695 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 26 treesize of output 27 [2023-08-30 15:18:26,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:26,700 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 43 treesize of output 37 [2023-08-30 15:18:26,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:18:26,731 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 15:18:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851474715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:26,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:26,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 15:18:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418017386] [2023-08-30 15:18:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:18:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:18:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=253, Unknown=2, NotChecked=0, Total=306 [2023-08-30 15:18:27,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 15:18:27,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 577 flow. Second operand has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states 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 15:18:27,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:27,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 15:18:27,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:27,667 INFO L130 PetriNetUnfolder]: 2073/3927 cut-off events. [2023-08-30 15:18:27,667 INFO L131 PetriNetUnfolder]: For 14814/15242 co-relation queries the response was YES. [2023-08-30 15:18:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17854 conditions, 3927 events. 2073/3927 cut-off events. For 14814/15242 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 31698 event pairs, 1006 based on Foata normal form. 434/3741 useless extension candidates. Maximal degree in co-relation 17827. Up to 2173 conditions per place. [2023-08-30 15:18:27,680 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 84 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2023-08-30 15:18:27,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 1143 flow [2023-08-30 15:18:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:18:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:18:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1099 transitions. [2023-08-30 15:18:27,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40449024659550975 [2023-08-30 15:18:27,684 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1099 transitions. [2023-08-30 15:18:27,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1099 transitions. [2023-08-30 15:18:27,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:27,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1099 transitions. [2023-08-30 15:18:27,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.9090909090909) internal successors, (1099), 11 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 15:18:27,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states 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 15:18:27,689 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states 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 15:18:27,689 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 577 flow. Second operand 11 states and 1099 transitions. [2023-08-30 15:18:27,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 1143 flow [2023-08-30 15:18:27,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 1137 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:27,700 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 772 flow [2023-08-30 15:18:27,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=772, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2023-08-30 15:18:27,700 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2023-08-30 15:18:27,700 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 772 flow [2023-08-30 15:18:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.22222222222223) internal successors, (1678), 18 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states 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 15:18:27,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:27,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:27,710 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 15:18:27,904 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,SelfDestructingSolverStorable14 [2023-08-30 15:18:27,905 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:27,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461161, now seen corresponding path program 1 times [2023-08-30 15:18:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29821216] [2023-08-30 15:18:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:28,091 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 15:18:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29821216] [2023-08-30 15:18:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29821216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537735934] [2023-08-30 15:18:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:28,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:28,092 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 15:18:28,094 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 15:18:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:28,200 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 13 treesize of output 9 [2023-08-30 15:18:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:28,219 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 15:18:28,257 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 15:18:28,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:28,294 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:18:28,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:28,300 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 24 treesize of output 25 [2023-08-30 15:18:28,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:28,307 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 37 treesize of output 31 [2023-08-30 15:18:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 15:18:28,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537735934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:28,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:28,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:18:28,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55640486] [2023-08-30 15:18:28,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:28,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:18:28,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:18:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2023-08-30 15:18:28,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:18:28,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 772 flow. Second operand has 20 states, 20 states have (on average 81.2) internal successors, (1624), 20 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 15:18:28,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:28,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:18:28,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:29,094 INFO L130 PetriNetUnfolder]: 2070/3932 cut-off events. [2023-08-30 15:18:29,094 INFO L131 PetriNetUnfolder]: For 17983/18369 co-relation queries the response was YES. [2023-08-30 15:18:29,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18611 conditions, 3932 events. 2070/3932 cut-off events. For 17983/18369 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 31561 event pairs, 759 based on Foata normal form. 389/3700 useless extension candidates. Maximal degree in co-relation 18581. Up to 2170 conditions per place. [2023-08-30 15:18:29,111 INFO L137 encePairwiseOnDemand]: 235/247 looper letters, 83 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2023-08-30 15:18:29,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 113 transitions, 1213 flow [2023-08-30 15:18:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:18:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:18:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1045 transitions. [2023-08-30 15:18:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525641025641026 [2023-08-30 15:18:29,114 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1045 transitions. [2023-08-30 15:18:29,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1045 transitions. [2023-08-30 15:18:29,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:29,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1045 transitions. [2023-08-30 15:18:29,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.08333333333333) internal successors, (1045), 12 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states 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 15:18:29,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:29,119 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:29,119 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 772 flow. Second operand 12 states and 1045 transitions. [2023-08-30 15:18:29,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 113 transitions, 1213 flow [2023-08-30 15:18:29,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 113 transitions, 1197 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 15:18:29,134 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 800 flow [2023-08-30 15:18:29,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=94, PETRI_TRANSITIONS=70} [2023-08-30 15:18:29,135 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2023-08-30 15:18:29,135 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 800 flow [2023-08-30 15:18:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.2) internal successors, (1624), 20 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 15:18:29,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:29,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:29,140 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 15:18:29,339 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,SelfDestructingSolverStorable15 [2023-08-30 15:18:29,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:29,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2084064892, now seen corresponding path program 1 times [2023-08-30 15:18:29,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:29,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567977164] [2023-08-30 15:18:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:29,487 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 15:18:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567977164] [2023-08-30 15:18:29,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567977164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854524440] [2023-08-30 15:18:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:29,490 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 15:18:29,491 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 15:18:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:29,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:18:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:29,598 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 15:18:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:29,626 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 15:18:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:29,642 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 15:18:29,649 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 15:18:29,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:29,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:29,700 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 25 treesize of output 26 [2023-08-30 15:18:29,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:29,706 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 125 treesize of output 117 [2023-08-30 15:18:29,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 15:18:29,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 21 [2023-08-30 15:18:29,733 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 15:18:29,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854524440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:29,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:29,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 15:18:29,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128979921] [2023-08-30 15:18:29,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:29,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:18:29,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:29,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:18:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=160, Unknown=6, NotChecked=0, Total=210 [2023-08-30 15:18:29,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:29,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 70 transitions, 800 flow. Second operand has 15 states, 15 states have (on average 78.4) internal successors, (1176), 15 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 15:18:29,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:29,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:29,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:30,250 INFO L130 PetriNetUnfolder]: 1990/3815 cut-off events. [2023-08-30 15:18:30,250 INFO L131 PetriNetUnfolder]: For 16800/16800 co-relation queries the response was YES. [2023-08-30 15:18:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18702 conditions, 3815 events. 1990/3815 cut-off events. For 16800/16800 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 29617 event pairs, 488 based on Foata normal form. 128/3326 useless extension candidates. Maximal degree in co-relation 18672. Up to 1491 conditions per place. [2023-08-30 15:18:30,267 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 88 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2023-08-30 15:18:30,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 104 transitions, 1406 flow [2023-08-30 15:18:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:18:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:18:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 593 transitions. [2023-08-30 15:18:30,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34297281665702717 [2023-08-30 15:18:30,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 593 transitions. [2023-08-30 15:18:30,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 593 transitions. [2023-08-30 15:18:30,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:30,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 593 transitions. [2023-08-30 15:18:30,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 15:18:30,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:18:30,272 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 800 flow. Second operand 7 states and 593 transitions. [2023-08-30 15:18:30,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 104 transitions, 1406 flow [2023-08-30 15:18:30,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 104 transitions, 1389 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 15:18:30,292 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 805 flow [2023-08-30 15:18:30,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2023-08-30 15:18:30,292 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 58 predicate places. [2023-08-30 15:18:30,293 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 805 flow [2023-08-30 15:18:30,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.4) internal successors, (1176), 15 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 15:18:30,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:30,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:30,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:30,497 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,SelfDestructingSolverStorable16 [2023-08-30 15:18:30,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:30,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461159, now seen corresponding path program 1 times [2023-08-30 15:18:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028355153] [2023-08-30 15:18:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:18:30,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:30,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028355153] [2023-08-30 15:18:30,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028355153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:30,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:30,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:18:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111724491] [2023-08-30 15:18:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:30,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:30,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:30,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 15:18:30,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 805 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 15:18:30,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:30,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 15:18:30,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:30,772 INFO L130 PetriNetUnfolder]: 1378/2683 cut-off events. [2023-08-30 15:18:30,772 INFO L131 PetriNetUnfolder]: For 16763/17104 co-relation queries the response was YES. [2023-08-30 15:18:30,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13373 conditions, 2683 events. 1378/2683 cut-off events. For 16763/17104 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 19906 event pairs, 1094 based on Foata normal form. 341/2831 useless extension candidates. Maximal degree in co-relation 13342. Up to 2635 conditions per place. [2023-08-30 15:18:30,818 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 56 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 15:18:30,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 62 transitions, 809 flow [2023-08-30 15:18:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-30 15:18:30,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45883940620782726 [2023-08-30 15:18:30,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-30 15:18:30,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-30 15:18:30,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:30,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-30 15:18:30,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 15:18:30,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:30,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:30,822 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 805 flow. Second operand 3 states and 340 transitions. [2023-08-30 15:18:30,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 62 transitions, 809 flow [2023-08-30 15:18:30,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 62 transitions, 800 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:30,833 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 688 flow [2023-08-30 15:18:30,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=688, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-08-30 15:18:30,833 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2023-08-30 15:18:30,834 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 688 flow [2023-08-30 15:18:30,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 15:18:30,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:30,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:30,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 15:18:30,834 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:30,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2128461158, now seen corresponding path program 2 times [2023-08-30 15:18:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:30,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745363264] [2023-08-30 15:18:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:18:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745363264] [2023-08-30 15:18:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745363264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:30,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:18:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960213770] [2023-08-30 15:18:30,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:30,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 247 [2023-08-30 15:18:30,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 15:18:30,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:30,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 247 [2023-08-30 15:18:30,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:31,046 INFO L130 PetriNetUnfolder]: 976/1916 cut-off events. [2023-08-30 15:18:31,047 INFO L131 PetriNetUnfolder]: For 13930/14226 co-relation queries the response was YES. [2023-08-30 15:18:31,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9070 conditions, 1916 events. 976/1916 cut-off events. For 13930/14226 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 13194 event pairs, 735 based on Foata normal form. 470/2330 useless extension candidates. Maximal degree in co-relation 9039. Up to 1871 conditions per place. [2023-08-30 15:18:31,055 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 47 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 15:18:31,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 53 transitions, 654 flow [2023-08-30 15:18:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 15:18:31,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-30 15:18:31,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 15:18:31,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 15:18:31,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:31,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 15:18:31,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 15:18:31,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:31,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:31,057 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 688 flow. Second operand 3 states and 338 transitions. [2023-08-30 15:18:31,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 53 transitions, 654 flow [2023-08-30 15:18:31,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 53 transitions, 573 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 15:18:31,065 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 479 flow [2023-08-30 15:18:31,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2023-08-30 15:18:31,066 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2023-08-30 15:18:31,066 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 479 flow [2023-08-30 15:18:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 15:18:31,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:31,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 15:18:31,066 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:31,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash -181499753, now seen corresponding path program 1 times [2023-08-30 15:18:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:31,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766685351] [2023-08-30 15:18:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:31,112 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 15:18:31,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766685351] [2023-08-30 15:18:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766685351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656445827] [2023-08-30 15:18:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:31,114 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 15:18:31,115 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 15:18:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:18:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:31,241 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 15:18:31,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:31,275 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 15:18:31,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656445827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:31,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:31,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 15:18:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120298513] [2023-08-30 15:18:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:18:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:18:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:18:31,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:18:31,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 479 flow. Second operand has 14 states, 14 states have (on average 95.42857142857143) internal successors, (1336), 14 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 15:18:31,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:31,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:18:31,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:31,678 INFO L130 PetriNetUnfolder]: 1031/2002 cut-off events. [2023-08-30 15:18:31,678 INFO L131 PetriNetUnfolder]: For 6355/6355 co-relation queries the response was YES. [2023-08-30 15:18:31,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8785 conditions, 2002 events. 1031/2002 cut-off events. For 6355/6355 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 13063 event pairs, 570 based on Foata normal form. 56/1998 useless extension candidates. Maximal degree in co-relation 8758. Up to 1460 conditions per place. [2023-08-30 15:18:31,685 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 45 selfloop transitions, 4 changer transitions 40/91 dead transitions. [2023-08-30 15:18:31,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 871 flow [2023-08-30 15:18:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:18:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:18:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 911 transitions. [2023-08-30 15:18:31,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098065677013045 [2023-08-30 15:18:31,687 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 911 transitions. [2023-08-30 15:18:31,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 911 transitions. [2023-08-30 15:18:31,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:31,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 911 transitions. [2023-08-30 15:18:31,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.22222222222223) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states 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 15:18:31,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 15:18:31,690 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 15:18:31,690 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 479 flow. Second operand 9 states and 911 transitions. [2023-08-30 15:18:31,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 871 flow [2023-08-30 15:18:31,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:31,699 INFO L231 Difference]: Finished difference. Result has 91 places, 43 transitions, 401 flow [2023-08-30 15:18:31,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=401, PETRI_PLACES=91, PETRI_TRANSITIONS=43} [2023-08-30 15:18:31,699 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2023-08-30 15:18:31,699 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 43 transitions, 401 flow [2023-08-30 15:18:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.42857142857143) internal successors, (1336), 14 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 15:18:31,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:31,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:31,706 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 15:18:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:31,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:31,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784518, now seen corresponding path program 1 times [2023-08-30 15:18:31,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:31,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316092871] [2023-08-30 15:18:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:31,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:32,122 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 15:18:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316092871] [2023-08-30 15:18:32,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316092871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159689966] [2023-08-30 15:18:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:32,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:32,123 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 15:18:32,125 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 15:18:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:32,257 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 15:18:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:32,281 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 15:18:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:32,345 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 15:18:32,357 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 15:18:32,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:32,389 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) 9223372039002259456))) is different from false [2023-08-30 15:18:32,393 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2023-08-30 15:18:32,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:32,420 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 29 treesize of output 30 [2023-08-30 15:18:32,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:32,425 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 81 treesize of output 75 [2023-08-30 15:18:32,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:18:32,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:18:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 15:18:32,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159689966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:32,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:32,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:18:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480295663] [2023-08-30 15:18:32,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:32,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:18:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:18:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=348, Unknown=10, NotChecked=78, Total=506 [2023-08-30 15:18:32,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:32,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 43 transitions, 401 flow. Second operand has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 15:18:32,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:32,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:32,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:33,082 INFO L130 PetriNetUnfolder]: 1177/2208 cut-off events. [2023-08-30 15:18:33,082 INFO L131 PetriNetUnfolder]: For 14661/15000 co-relation queries the response was YES. [2023-08-30 15:18:33,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10636 conditions, 2208 events. 1177/2208 cut-off events. For 14661/15000 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 15199 event pairs, 648 based on Foata normal form. 441/2577 useless extension candidates. Maximal degree in co-relation 10605. Up to 705 conditions per place. [2023-08-30 15:18:33,092 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 69 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2023-08-30 15:18:33,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 892 flow [2023-08-30 15:18:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:18:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:18:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 842 transitions. [2023-08-30 15:18:33,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408906882591093 [2023-08-30 15:18:33,094 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 842 transitions. [2023-08-30 15:18:33,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 842 transitions. [2023-08-30 15:18:33,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:33,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 842 transitions. [2023-08-30 15:18:33,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 15:18:33,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:33,097 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:33,097 INFO L175 Difference]: Start difference. First operand has 91 places, 43 transitions, 401 flow. Second operand 10 states and 842 transitions. [2023-08-30 15:18:33,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 892 flow [2023-08-30 15:18:33,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 740 flow, removed 55 selfloop flow, removed 15 redundant places. [2023-08-30 15:18:33,116 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 396 flow [2023-08-30 15:18:33,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2023-08-30 15:18:33,117 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2023-08-30 15:18:33,117 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 396 flow [2023-08-30 15:18:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 15:18:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:33,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:33,123 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 15:18:33,321 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,SelfDestructingSolverStorable20 [2023-08-30 15:18:33,321 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:33,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784517, now seen corresponding path program 1 times [2023-08-30 15:18:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:33,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801599242] [2023-08-30 15:18:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:33,539 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 15:18:33,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801599242] [2023-08-30 15:18:33,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801599242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352708511] [2023-08-30 15:18:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:33,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:33,541 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 15:18:33,543 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 15:18:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:18:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:33,675 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 15:18:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:33,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:18:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:33,766 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 15:18:33,779 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 15:18:33,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:33,795 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_560 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_560) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 4294967296)) is different from false [2023-08-30 15:18:33,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:33,858 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 27 treesize of output 28 [2023-08-30 15:18:33,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:33,862 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 141 treesize of output 129 [2023-08-30 15:18:33,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:18:33,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:18:33,929 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 15:18:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352708511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:33,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:33,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:18:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779774082] [2023-08-30 15:18:33,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:33,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:18:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:18:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=382, Unknown=9, NotChecked=40, Total=506 [2023-08-30 15:18:33,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:33,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 396 flow. Second operand has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 15:18:33,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:33,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:34,386 INFO L130 PetriNetUnfolder]: 1102/2070 cut-off events. [2023-08-30 15:18:34,386 INFO L131 PetriNetUnfolder]: For 8313/8694 co-relation queries the response was YES. [2023-08-30 15:18:34,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9341 conditions, 2070 events. 1102/2070 cut-off events. For 8313/8694 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 14105 event pairs, 465 based on Foata normal form. 432/2448 useless extension candidates. Maximal degree in co-relation 9316. Up to 705 conditions per place. [2023-08-30 15:18:34,394 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 68 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2023-08-30 15:18:34,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 783 flow [2023-08-30 15:18:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:18:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:18:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 839 transitions. [2023-08-30 15:18:34,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396761133603239 [2023-08-30 15:18:34,395 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 839 transitions. [2023-08-30 15:18:34,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 839 transitions. [2023-08-30 15:18:34,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:34,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 839 transitions. [2023-08-30 15:18:34,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.9) internal successors, (839), 10 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 15:18:34,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:34,399 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:34,399 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 396 flow. Second operand 10 states and 839 transitions. [2023-08-30 15:18:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 783 flow [2023-08-30 15:18:34,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 746 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:34,404 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 382 flow [2023-08-30 15:18:34,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=382, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2023-08-30 15:18:34,404 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2023-08-30 15:18:34,404 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 382 flow [2023-08-30 15:18:34,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 15:18:34,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:34,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:34,409 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 15:18:34,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:34,609 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:34,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784211, now seen corresponding path program 1 times [2023-08-30 15:18:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:34,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425490173] [2023-08-30 15:18:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:34,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 15:18:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:34,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425490173] [2023-08-30 15:18:34,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425490173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:18:34,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:18:34,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:18:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884865748] [2023-08-30 15:18:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:18:34,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:18:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:18:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:18:34,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:18:34,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:18:34,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:34,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:18:34,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:34,806 INFO L130 PetriNetUnfolder]: 1000/1869 cut-off events. [2023-08-30 15:18:34,806 INFO L131 PetriNetUnfolder]: For 7465/7780 co-relation queries the response was YES. [2023-08-30 15:18:34,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8104 conditions, 1869 events. 1000/1869 cut-off events. For 7465/7780 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 12164 event pairs, 750 based on Foata normal form. 315/2184 useless extension candidates. Maximal degree in co-relation 8080. Up to 1755 conditions per place. [2023-08-30 15:18:34,814 INFO L137 encePairwiseOnDemand]: 245/247 looper letters, 49 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 15:18:34,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 52 transitions, 507 flow [2023-08-30 15:18:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:18:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:18:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 15:18:34,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46288798920377866 [2023-08-30 15:18:34,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 15:18:34,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 15:18:34,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:34,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 15:18:34,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:18:34,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:34,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:18:34,817 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 382 flow. Second operand 3 states and 343 transitions. [2023-08-30 15:18:34,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 52 transitions, 507 flow [2023-08-30 15:18:34,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 52 transitions, 480 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:34,820 INFO L231 Difference]: Finished difference. Result has 75 places, 42 transitions, 322 flow [2023-08-30 15:18:34,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=42} [2023-08-30 15:18:34,820 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2023-08-30 15:18:34,821 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 42 transitions, 322 flow [2023-08-30 15:18:34,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:18:34,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:34,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:34,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 15:18:34,821 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:34,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1557784239, now seen corresponding path program 2 times [2023-08-30 15:18:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:34,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208713990] [2023-08-30 15:18:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:34,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208713990] [2023-08-30 15:18:34,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208713990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511345237] [2023-08-30 15:18:34,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:34,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:34,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:34,893 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 15:18:34,895 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 15:18:34,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:34,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:18:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:35,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511345237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:35,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:35,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 15:18:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168076940] [2023-08-30 15:18:35,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:18:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:18:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:18:35,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:18:35,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 42 transitions, 322 flow. Second operand has 19 states, 19 states have (on average 95.21052631578948) internal successors, (1809), 19 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 15:18:35,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:35,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:18:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:35,572 INFO L130 PetriNetUnfolder]: 855/1588 cut-off events. [2023-08-30 15:18:35,572 INFO L131 PetriNetUnfolder]: For 5743/6025 co-relation queries the response was YES. [2023-08-30 15:18:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6601 conditions, 1588 events. 855/1588 cut-off events. For 5743/6025 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10224 event pairs, 282 based on Foata normal form. 366/1954 useless extension candidates. Maximal degree in co-relation 6578. Up to 774 conditions per place. [2023-08-30 15:18:35,577 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 104 selfloop transitions, 15 changer transitions 7/127 dead transitions. [2023-08-30 15:18:35,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1056 flow [2023-08-30 15:18:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:18:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:18:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1233 transitions. [2023-08-30 15:18:35,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159919028340081 [2023-08-30 15:18:35,578 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1233 transitions. [2023-08-30 15:18:35,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1233 transitions. [2023-08-30 15:18:35,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:35,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1233 transitions. [2023-08-30 15:18:35,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.75) internal successors, (1233), 12 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 15:18:35,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:35,582 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:18:35,582 INFO L175 Difference]: Start difference. First operand has 75 places, 42 transitions, 322 flow. Second operand 12 states and 1233 transitions. [2023-08-30 15:18:35,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1056 flow [2023-08-30 15:18:35,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 127 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:18:35,585 INFO L231 Difference]: Finished difference. Result has 92 places, 53 transitions, 511 flow [2023-08-30 15:18:35,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=511, PETRI_PLACES=92, PETRI_TRANSITIONS=53} [2023-08-30 15:18:35,586 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2023-08-30 15:18:35,586 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 53 transitions, 511 flow [2023-08-30 15:18:35,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.21052631578948) internal successors, (1809), 19 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 15:18:35,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:35,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:35,594 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 15:18:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:35,790 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:35,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1993561149, now seen corresponding path program 2 times [2023-08-30 15:18:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358514492] [2023-08-30 15:18:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:35,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:36,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358514492] [2023-08-30 15:18:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358514492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321921850] [2023-08-30 15:18:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:36,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:36,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:36,021 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 15:18:36,021 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 15:18:36,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:18:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:36,178 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 15:18:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:36,199 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 15:18:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:36,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:36,277 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:18:36,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:36,283 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 24 treesize of output 25 [2023-08-30 15:18:36,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:36,287 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 37 treesize of output 31 [2023-08-30 15:18:36,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-08-30 15:18:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 15:18:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321921850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:36,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 15:18:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499622789] [2023-08-30 15:18:36,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:18:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:18:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=440, Unknown=1, NotChecked=42, Total=552 [2023-08-30 15:18:36,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:18:36,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 53 transitions, 511 flow. Second operand has 24 states, 24 states have (on average 81.16666666666667) internal successors, (1948), 24 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states 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 15:18:36,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:36,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:18:36,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:36,758 INFO L130 PetriNetUnfolder]: 861/1599 cut-off events. [2023-08-30 15:18:36,758 INFO L131 PetriNetUnfolder]: For 9210/9500 co-relation queries the response was YES. [2023-08-30 15:18:36,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1599 events. 861/1599 cut-off events. For 9210/9500 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9805 event pairs, 577 based on Foata normal form. 294/1891 useless extension candidates. Maximal degree in co-relation 7572. Up to 1041 conditions per place. [2023-08-30 15:18:36,764 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 63 selfloop transitions, 21 changer transitions 1/86 dead transitions. [2023-08-30 15:18:36,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 86 transitions, 894 flow [2023-08-30 15:18:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:18:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:18:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1107 transitions. [2023-08-30 15:18:36,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34475241357832453 [2023-08-30 15:18:36,766 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1107 transitions. [2023-08-30 15:18:36,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1107 transitions. [2023-08-30 15:18:36,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:36,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1107 transitions. [2023-08-30 15:18:36,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.15384615384616) internal successors, (1107), 13 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states 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 15:18:36,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 15:18:36,769 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 15:18:36,770 INFO L175 Difference]: Start difference. First operand has 92 places, 53 transitions, 511 flow. Second operand 13 states and 1107 transitions. [2023-08-30 15:18:36,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 86 transitions, 894 flow [2023-08-30 15:18:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 86 transitions, 864 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 15:18:36,776 INFO L231 Difference]: Finished difference. Result has 104 places, 60 transitions, 613 flow [2023-08-30 15:18:36,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=613, PETRI_PLACES=104, PETRI_TRANSITIONS=60} [2023-08-30 15:18:36,777 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 67 predicate places. [2023-08-30 15:18:36,777 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 60 transitions, 613 flow [2023-08-30 15:18:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.16666666666667) internal successors, (1948), 24 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states 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 15:18:36,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:36,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:36,782 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 15:18:36,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 15:18:36,982 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:36,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash -925121662, now seen corresponding path program 2 times [2023-08-30 15:18:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:36,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45017851] [2023-08-30 15:18:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:36,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:37,206 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 15:18:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45017851] [2023-08-30 15:18:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45017851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30345863] [2023-08-30 15:18:37,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:37,209 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 15:18:37,211 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 15:18:37,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:37,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:18:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:37,355 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 13 treesize of output 9 [2023-08-30 15:18:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:37,380 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 15:18:37,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:37,401 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 15:18:37,444 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 15:18:37,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:37,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:37,542 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 27 treesize of output 28 [2023-08-30 15:18:37,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:37,547 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 141 treesize of output 129 [2023-08-30 15:18:37,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:18:37,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:18:37,601 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 15:18:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30345863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:37,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:37,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:18:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075587180] [2023-08-30 15:18:37,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:18:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:18:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=421, Unknown=14, NotChecked=0, Total=506 [2023-08-30 15:18:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:37,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 60 transitions, 613 flow. Second operand has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states 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 15:18:37,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:37,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:38,340 INFO L130 PetriNetUnfolder]: 1207/2269 cut-off events. [2023-08-30 15:18:38,340 INFO L131 PetriNetUnfolder]: For 11119/11119 co-relation queries the response was YES. [2023-08-30 15:18:38,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10200 conditions, 2269 events. 1207/2269 cut-off events. For 11119/11119 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14821 event pairs, 298 based on Foata normal form. 232/2501 useless extension candidates. Maximal degree in co-relation 10165. Up to 848 conditions per place. [2023-08-30 15:18:38,370 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 108 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2023-08-30 15:18:38,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 124 transitions, 1429 flow [2023-08-30 15:18:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:18:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:18:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 833 transitions. [2023-08-30 15:18:38,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337246963562753 [2023-08-30 15:18:38,377 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 833 transitions. [2023-08-30 15:18:38,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 833 transitions. [2023-08-30 15:18:38,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:38,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 833 transitions. [2023-08-30 15:18:38,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.3) internal successors, (833), 10 states have internal predecessors, (833), 0 states have call successors, (0), 0 states 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 15:18:38,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:38,380 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 247.0) internal successors, (2717), 11 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states 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 15:18:38,380 INFO L175 Difference]: Start difference. First operand has 104 places, 60 transitions, 613 flow. Second operand 10 states and 833 transitions. [2023-08-30 15:18:38,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 124 transitions, 1429 flow [2023-08-30 15:18:38,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1383 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 15:18:38,391 INFO L231 Difference]: Finished difference. Result has 109 places, 62 transitions, 627 flow [2023-08-30 15:18:38,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=627, PETRI_PLACES=109, PETRI_TRANSITIONS=62} [2023-08-30 15:18:38,391 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 72 predicate places. [2023-08-30 15:18:38,391 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 62 transitions, 627 flow [2023-08-30 15:18:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states 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 15:18:38,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:38,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-30 15:18:38,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 15:18:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 15:18:38,597 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:38,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1993561148, now seen corresponding path program 3 times [2023-08-30 15:18:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303164678] [2023-08-30 15:18:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:38,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:38,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303164678] [2023-08-30 15:18:38,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303164678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898955537] [2023-08-30 15:18:38,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:38,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:38,820 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 15:18:38,822 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 15:18:38,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:18:38,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:18:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:38,983 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 15:18:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:39,005 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 15:18:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:39,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:39,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:39,118 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 26 treesize of output 27 [2023-08-30 15:18:39,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:39,123 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 43 treesize of output 37 [2023-08-30 15:18:39,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:18:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:39,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898955537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:39,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:39,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 15:18:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89623989] [2023-08-30 15:18:39,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:18:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:18:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=477, Unknown=4, NotChecked=0, Total=552 [2023-08-30 15:18:39,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 247 [2023-08-30 15:18:39,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 62 transitions, 627 flow. Second operand has 24 states, 24 states have (on average 91.16666666666667) internal successors, (2188), 24 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states 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 15:18:39,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:39,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 247 [2023-08-30 15:18:39,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:40,128 INFO L130 PetriNetUnfolder]: 1168/2166 cut-off events. [2023-08-30 15:18:40,128 INFO L131 PetriNetUnfolder]: For 11729/12023 co-relation queries the response was YES. [2023-08-30 15:18:40,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10893 conditions, 2166 events. 1168/2166 cut-off events. For 11729/12023 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14008 event pairs, 652 based on Foata normal form. 296/2450 useless extension candidates. Maximal degree in co-relation 10857. Up to 1405 conditions per place. [2023-08-30 15:18:40,137 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 68 selfloop transitions, 20 changer transitions 1/90 dead transitions. [2023-08-30 15:18:40,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 90 transitions, 1003 flow [2023-08-30 15:18:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:18:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:18:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1235 transitions. [2023-08-30 15:18:40,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-08-30 15:18:40,139 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1235 transitions. [2023-08-30 15:18:40,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1235 transitions. [2023-08-30 15:18:40,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:40,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1235 transitions. [2023-08-30 15:18:40,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.0) internal successors, (1235), 13 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states 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 15:18:40,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 15:18:40,142 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 15:18:40,142 INFO L175 Difference]: Start difference. First operand has 109 places, 62 transitions, 627 flow. Second operand 13 states and 1235 transitions. [2023-08-30 15:18:40,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 90 transitions, 1003 flow [2023-08-30 15:18:40,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 90 transitions, 974 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:40,152 INFO L231 Difference]: Finished difference. Result has 114 places, 60 transitions, 617 flow [2023-08-30 15:18:40,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=617, PETRI_PLACES=114, PETRI_TRANSITIONS=60} [2023-08-30 15:18:40,152 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-08-30 15:18:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 60 transitions, 617 flow [2023-08-30 15:18:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 91.16666666666667) internal successors, (2188), 24 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states 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 15:18:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:40,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:40,158 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 15:18:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 15:18:40,358 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:40,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -925121661, now seen corresponding path program 1 times [2023-08-30 15:18:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:40,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902564827] [2023-08-30 15:18:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:40,547 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 15:18:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902564827] [2023-08-30 15:18:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902564827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160472703] [2023-08-30 15:18:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:40,548 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 15:18:40,551 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 15:18:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:40,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:18:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:40,682 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 13 treesize of output 9 [2023-08-30 15:18:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:40,701 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 18 treesize of output 20 [2023-08-30 15:18:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:40,721 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 18 treesize of output 20 [2023-08-30 15:18:40,760 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 15:18:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:40,797 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296))) is different from false [2023-08-30 15:18:40,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:40,830 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 29 treesize of output 30 [2023-08-30 15:18:40,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:40,835 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 81 treesize of output 75 [2023-08-30 15:18:40,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:18:40,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:18:40,908 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 15:18:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160472703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:40,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:40,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:18:40,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399066495] [2023-08-30 15:18:40,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:18:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:18:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=392, Unknown=1, NotChecked=40, Total=506 [2023-08-30 15:18:40,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:18:40,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 60 transitions, 617 flow. Second operand has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states 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 15:18:40,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:40,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:18:40,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:41,429 INFO L130 PetriNetUnfolder]: 1084/2020 cut-off events. [2023-08-30 15:18:41,429 INFO L131 PetriNetUnfolder]: For 12736/12888 co-relation queries the response was YES. [2023-08-30 15:18:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10197 conditions, 2020 events. 1084/2020 cut-off events. For 12736/12888 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12897 event pairs, 294 based on Foata normal form. 232/2244 useless extension candidates. Maximal degree in co-relation 10162. Up to 818 conditions per place. [2023-08-30 15:18:41,438 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 90 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2023-08-30 15:18:41,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 106 transitions, 1244 flow [2023-08-30 15:18:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:18:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:18:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 745 transitions. [2023-08-30 15:18:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351327035537562 [2023-08-30 15:18:41,441 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 745 transitions. [2023-08-30 15:18:41,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 745 transitions. [2023-08-30 15:18:41,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:41,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 745 transitions. [2023-08-30 15:18:41,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.77777777777777) internal successors, (745), 9 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 15:18:41,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 15:18:41,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 15:18:41,444 INFO L175 Difference]: Start difference. First operand has 114 places, 60 transitions, 617 flow. Second operand 9 states and 745 transitions. [2023-08-30 15:18:41,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 106 transitions, 1244 flow [2023-08-30 15:18:41,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 1185 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-08-30 15:18:41,455 INFO L231 Difference]: Finished difference. Result has 110 places, 59 transitions, 580 flow [2023-08-30 15:18:41,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=110, PETRI_TRANSITIONS=59} [2023-08-30 15:18:41,455 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 73 predicate places. [2023-08-30 15:18:41,455 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 59 transitions, 580 flow [2023-08-30 15:18:41,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.30434782608695) internal successors, (1801), 23 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states 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 15:18:41,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:41,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:41,460 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 15:18:41,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:41,659 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:41,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1791241218, now seen corresponding path program 2 times [2023-08-30 15:18:41,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:41,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601903109] [2023-08-30 15:18:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:41,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601903109] [2023-08-30 15:18:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601903109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95345074] [2023-08-30 15:18:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:41,901 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 15:18:41,903 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 15:18:42,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:42,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:18:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:42,077 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 15:18:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:42,128 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 20 treesize of output 22 [2023-08-30 15:18:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:42,162 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 20 treesize of output 22 [2023-08-30 15:18:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:42,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:42,373 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_120| Int) (v_ArrVal_797 (Array Int Int))) (or (< |v_thread1Thread1of1ForFork0_~i~0#1_120| 2) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_797) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_120| 4))) 9223372039002259456)) (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_120|))) is different from false [2023-08-30 15:18:42,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:42,429 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 31 treesize of output 32 [2023-08-30 15:18:42,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:42,437 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 89 treesize of output 81 [2023-08-30 15:18:42,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2023-08-30 15:18:42,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 24 [2023-08-30 15:18:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95345074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:42,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:18:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16441461] [2023-08-30 15:18:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:18:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:18:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-30 15:18:42,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:18:42,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 59 transitions, 580 flow. Second operand has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 15:18:42,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:42,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:18:42,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:50,383 INFO L130 PetriNetUnfolder]: 1648/2929 cut-off events. [2023-08-30 15:18:50,383 INFO L131 PetriNetUnfolder]: For 17197/17644 co-relation queries the response was YES. [2023-08-30 15:18:50,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15019 conditions, 2929 events. 1648/2929 cut-off events. For 17197/17644 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19311 event pairs, 224 based on Foata normal form. 623/3550 useless extension candidates. Maximal degree in co-relation 14985. Up to 641 conditions per place. [2023-08-30 15:18:50,394 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 337 selfloop transitions, 62 changer transitions 13/413 dead transitions. [2023-08-30 15:18:50,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 413 transitions, 4230 flow [2023-08-30 15:18:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:18:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:18:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2788 transitions. [2023-08-30 15:18:50,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.313540260908682 [2023-08-30 15:18:50,397 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2788 transitions. [2023-08-30 15:18:50,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2788 transitions. [2023-08-30 15:18:50,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:50,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2788 transitions. [2023-08-30 15:18:50,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 77.44444444444444) internal successors, (2788), 36 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states 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 15:18:50,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:18:50,405 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:18:50,405 INFO L175 Difference]: Start difference. First operand has 110 places, 59 transitions, 580 flow. Second operand 36 states and 2788 transitions. [2023-08-30 15:18:50,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 413 transitions, 4230 flow [2023-08-30 15:18:50,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 413 transitions, 4029 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 15:18:50,420 INFO L231 Difference]: Finished difference. Result has 151 places, 99 transitions, 1237 flow [2023-08-30 15:18:50,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1237, PETRI_PLACES=151, PETRI_TRANSITIONS=99} [2023-08-30 15:18:50,421 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 114 predicate places. [2023-08-30 15:18:50,421 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 99 transitions, 1237 flow [2023-08-30 15:18:50,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 15:18:50,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:50,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:50,428 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 15:18:50,626 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,SelfDestructingSolverStorable28 [2023-08-30 15:18:50,626 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:50,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash -306094746, now seen corresponding path program 2 times [2023-08-30 15:18:50,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:50,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409561060] [2023-08-30 15:18:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:50,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:50,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409561060] [2023-08-30 15:18:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409561060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:50,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265700951] [2023-08-30 15:18:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:18:50,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:50,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:50,728 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 15:18:50,729 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 15:18:50,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:18:50,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:18:50,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:50,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:50,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265700951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:50,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:50,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 15:18:50,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413052340] [2023-08-30 15:18:50,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:18:50,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:50,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:18:50,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:18:51,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:18:51,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 99 transitions, 1237 flow. Second operand has 24 states, 24 states have (on average 95.20833333333333) internal successors, (2285), 24 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states 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 15:18:51,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:51,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:18:51,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:18:51,874 INFO L130 PetriNetUnfolder]: 1599/2860 cut-off events. [2023-08-30 15:18:51,875 INFO L131 PetriNetUnfolder]: For 34699/35118 co-relation queries the response was YES. [2023-08-30 15:18:51,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16460 conditions, 2860 events. 1599/2860 cut-off events. For 34699/35118 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18667 event pairs, 482 based on Foata normal form. 459/3317 useless extension candidates. Maximal degree in co-relation 16413. Up to 1119 conditions per place. [2023-08-30 15:18:51,891 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 226 selfloop transitions, 37 changer transitions 12/276 dead transitions. [2023-08-30 15:18:51,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 276 transitions, 2904 flow [2023-08-30 15:18:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:18:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:18:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2257 transitions. [2023-08-30 15:18:51,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153478100846522 [2023-08-30 15:18:51,895 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2257 transitions. [2023-08-30 15:18:51,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2257 transitions. [2023-08-30 15:18:51,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:18:51,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2257 transitions. [2023-08-30 15:18:51,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 102.5909090909091) internal successors, (2257), 22 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states 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 15:18:51,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states 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 15:18:51,900 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states 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 15:18:51,900 INFO L175 Difference]: Start difference. First operand has 151 places, 99 transitions, 1237 flow. Second operand 22 states and 2257 transitions. [2023-08-30 15:18:51,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 276 transitions, 2904 flow [2023-08-30 15:18:51,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 276 transitions, 2773 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-08-30 15:18:51,925 INFO L231 Difference]: Finished difference. Result has 162 places, 97 transitions, 1149 flow [2023-08-30 15:18:51,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1149, PETRI_PLACES=162, PETRI_TRANSITIONS=97} [2023-08-30 15:18:51,926 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2023-08-30 15:18:51,926 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 97 transitions, 1149 flow [2023-08-30 15:18:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.20833333333333) internal successors, (2285), 24 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states 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 15:18:51,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:18:51,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:18:51,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 15:18:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:52,129 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:18:52,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:18:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1791241219, now seen corresponding path program 3 times [2023-08-30 15:18:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:18:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856038228] [2023-08-30 15:18:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:18:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:18:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:18:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:18:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856038228] [2023-08-30 15:18:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856038228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:18:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765858209] [2023-08-30 15:18:52,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:18:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:18:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:18:52,369 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 15:18:52,371 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 15:18:52,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:18:52,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:18:52,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:18:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:18:52,575 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 15:18:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:52,617 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 18 treesize of output 20 [2023-08-30 15:18:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:18:52,653 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 18 treesize of output 20 [2023-08-30 15:18:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:18:52,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:52,946 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 29 treesize of output 30 [2023-08-30 15:18:52,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:18:52,953 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 157 treesize of output 141 [2023-08-30 15:18:52,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 21 [2023-08-30 15:18:52,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 20 [2023-08-30 15:18:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:18:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765858209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:18:53,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:18:53,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:18:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84607154] [2023-08-30 15:18:53,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:18:53,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:18:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:18:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:18:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=713, Unknown=3, NotChecked=0, Total=812 [2023-08-30 15:18:54,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:18:54,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 97 transitions, 1149 flow. Second operand has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 15:18:54,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:18:54,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:18:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:18,466 INFO L130 PetriNetUnfolder]: 1487/2681 cut-off events. [2023-08-30 15:19:18,466 INFO L131 PetriNetUnfolder]: For 30128/30544 co-relation queries the response was YES. [2023-08-30 15:19:18,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14974 conditions, 2681 events. 1487/2681 cut-off events. For 30128/30544 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17508 event pairs, 132 based on Foata normal form. 499/3178 useless extension candidates. Maximal degree in co-relation 14926. Up to 605 conditions per place. [2023-08-30 15:19:18,481 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 326 selfloop transitions, 58 changer transitions 18/403 dead transitions. [2023-08-30 15:19:18,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 403 transitions, 4284 flow [2023-08-30 15:19:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:19:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:19:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2771 transitions. [2023-08-30 15:19:18,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116284300494827 [2023-08-30 15:19:18,484 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2771 transitions. [2023-08-30 15:19:18,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2771 transitions. [2023-08-30 15:19:18,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:18,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2771 transitions. [2023-08-30 15:19:18,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 76.97222222222223) internal successors, (2771), 36 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states 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 15:19:18,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:19:18,491 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:19:18,491 INFO L175 Difference]: Start difference. First operand has 162 places, 97 transitions, 1149 flow. Second operand 36 states and 2771 transitions. [2023-08-30 15:19:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 403 transitions, 4284 flow [2023-08-30 15:19:18,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 403 transitions, 4226 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-30 15:19:18,531 INFO L231 Difference]: Finished difference. Result has 185 places, 94 transitions, 1153 flow [2023-08-30 15:19:18,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1153, PETRI_PLACES=185, PETRI_TRANSITIONS=94} [2023-08-30 15:19:18,532 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 148 predicate places. [2023-08-30 15:19:18,532 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 94 transitions, 1153 flow [2023-08-30 15:19:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.13793103448276) internal successors, (2005), 29 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 15:19:18,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:18,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:18,538 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 15:19:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:18,736 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:18,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1386002010, now seen corresponding path program 2 times [2023-08-30 15:19:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936938353] [2023-08-30 15:19:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936938353] [2023-08-30 15:19:18,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936938353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:18,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421896277] [2023-08-30 15:19:18,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:19:18,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:18,807 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 15:19:18,809 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 15:19:18,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:19:18,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:18,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:19:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:19,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:19,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421896277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:19,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:19,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 15:19:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793078783] [2023-08-30 15:19:19,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:19,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:19:19,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:19:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:19:19,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:19:19,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 94 transitions, 1153 flow. Second operand has 19 states, 19 states have (on average 95.3157894736842) internal successors, (1811), 19 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states 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 15:19:19,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:19,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:19:19,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:19,631 INFO L130 PetriNetUnfolder]: 1424/2588 cut-off events. [2023-08-30 15:19:19,631 INFO L131 PetriNetUnfolder]: For 31625/31833 co-relation queries the response was YES. [2023-08-30 15:19:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14749 conditions, 2588 events. 1424/2588 cut-off events. For 31625/31833 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16713 event pairs, 701 based on Foata normal form. 280/2858 useless extension candidates. Maximal degree in co-relation 14700. Up to 1684 conditions per place. [2023-08-30 15:19:19,644 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 83 selfloop transitions, 5 changer transitions 83/177 dead transitions. [2023-08-30 15:19:19,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 177 transitions, 2223 flow [2023-08-30 15:19:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:19:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:19:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1204 transitions. [2023-08-30 15:19:19,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40620782726045884 [2023-08-30 15:19:19,646 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1204 transitions. [2023-08-30 15:19:19,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1204 transitions. [2023-08-30 15:19:19,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:19,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1204 transitions. [2023-08-30 15:19:19,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.33333333333333) internal successors, (1204), 12 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states 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 15:19:19,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:19,649 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:19,649 INFO L175 Difference]: Start difference. First operand has 185 places, 94 transitions, 1153 flow. Second operand 12 states and 1204 transitions. [2023-08-30 15:19:19,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 177 transitions, 2223 flow [2023-08-30 15:19:19,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 2085 flow, removed 3 selfloop flow, removed 21 redundant places. [2023-08-30 15:19:19,682 INFO L231 Difference]: Finished difference. Result has 179 places, 80 transitions, 953 flow [2023-08-30 15:19:19,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=953, PETRI_PLACES=179, PETRI_TRANSITIONS=80} [2023-08-30 15:19:19,683 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 142 predicate places. [2023-08-30 15:19:19,683 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 80 transitions, 953 flow [2023-08-30 15:19:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.3157894736842) internal successors, (1811), 19 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states 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 15:19:19,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:19,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:19,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-30 15:19:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:19,883 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:19,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash 135157845, now seen corresponding path program 1 times [2023-08-30 15:19:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:19,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117704297] [2023-08-30 15:19:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117704297] [2023-08-30 15:19:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117704297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615481729] [2023-08-30 15:19:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:19,923 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 15:19:19,952 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 15:19:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:19:20,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615481729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:20,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:20,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 15:19:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421243255] [2023-08-30 15:19:20,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 15:19:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 15:19:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 15:19:20,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:19:20,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 80 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 15:19:20,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:20,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:19:20,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:20,590 INFO L130 PetriNetUnfolder]: 1943/3547 cut-off events. [2023-08-30 15:19:20,590 INFO L131 PetriNetUnfolder]: For 51727/52329 co-relation queries the response was YES. [2023-08-30 15:19:20,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 3547 events. 1943/3547 cut-off events. For 51727/52329 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24345 event pairs, 406 based on Foata normal form. 776/4323 useless extension candidates. Maximal degree in co-relation 22360. Up to 787 conditions per place. [2023-08-30 15:19:20,611 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 151 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2023-08-30 15:19:20,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 182 transitions, 2449 flow [2023-08-30 15:19:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:19:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:19:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 941 transitions. [2023-08-30 15:19:20,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47621457489878544 [2023-08-30 15:19:20,612 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 941 transitions. [2023-08-30 15:19:20,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 941 transitions. [2023-08-30 15:19:20,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:20,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 941 transitions. [2023-08-30 15:19:20,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.625) internal successors, (941), 8 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 15:19:20,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:19:20,614 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 15:19:20,615 INFO L175 Difference]: Start difference. First operand has 179 places, 80 transitions, 953 flow. Second operand 8 states and 941 transitions. [2023-08-30 15:19:20,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 182 transitions, 2449 flow [2023-08-30 15:19:20,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 182 transitions, 2110 flow, removed 113 selfloop flow, removed 21 redundant places. [2023-08-30 15:19:20,687 INFO L231 Difference]: Finished difference. Result has 148 places, 83 transitions, 977 flow [2023-08-30 15:19:20,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=148, PETRI_TRANSITIONS=83} [2023-08-30 15:19:20,690 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2023-08-30 15:19:20,690 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 83 transitions, 977 flow [2023-08-30 15:19:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 15:19:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:20,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:20,890 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:20,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -270081404, now seen corresponding path program 3 times [2023-08-30 15:19:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114106601] [2023-08-30 15:19:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114106601] [2023-08-30 15:19:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114106601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564645384] [2023-08-30 15:19:21,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:21,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:21,106 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 15:19:21,109 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 15:19:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:19:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 15:19:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:21,316 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 15:19:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:21,346 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 15:19:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:21,371 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 15:19:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:21,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:21,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:21,528 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 27 treesize of output 28 [2023-08-30 15:19:21,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:21,534 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 141 treesize of output 129 [2023-08-30 15:19:21,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:19:21,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:19:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:21,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564645384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:21,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:21,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 15:19:21,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137448061] [2023-08-30 15:19:21,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:21,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:19:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:19:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=609, Unknown=9, NotChecked=0, Total=702 [2023-08-30 15:19:21,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:19:21,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 83 transitions, 977 flow. Second operand has 27 states, 27 states have (on average 78.25925925925925) internal successors, (2113), 27 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states 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 15:19:21,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:21,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:19:21,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:22,521 INFO L130 PetriNetUnfolder]: 2587/4724 cut-off events. [2023-08-30 15:19:22,522 INFO L131 PetriNetUnfolder]: For 51235/51435 co-relation queries the response was YES. [2023-08-30 15:19:22,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27061 conditions, 4724 events. 2587/4724 cut-off events. For 51235/51435 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33555 event pairs, 586 based on Foata normal form. 608/5324 useless extension candidates. Maximal degree in co-relation 27018. Up to 1504 conditions per place. [2023-08-30 15:19:22,549 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 227 selfloop transitions, 15 changer transitions 0/248 dead transitions. [2023-08-30 15:19:22,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 3605 flow [2023-08-30 15:19:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:19:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:19:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 998 transitions. [2023-08-30 15:19:22,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367071524966262 [2023-08-30 15:19:22,550 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 998 transitions. [2023-08-30 15:19:22,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 998 transitions. [2023-08-30 15:19:22,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:22,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 998 transitions. [2023-08-30 15:19:22,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 83.16666666666667) internal successors, (998), 12 states have internal predecessors, (998), 0 states have call successors, (0), 0 states 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 15:19:22,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:22,553 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:22,553 INFO L175 Difference]: Start difference. First operand has 148 places, 83 transitions, 977 flow. Second operand 12 states and 998 transitions. [2023-08-30 15:19:22,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 3605 flow [2023-08-30 15:19:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 248 transitions, 3458 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-30 15:19:22,591 INFO L231 Difference]: Finished difference. Result has 159 places, 85 transitions, 996 flow [2023-08-30 15:19:22,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=996, PETRI_PLACES=159, PETRI_TRANSITIONS=85} [2023-08-30 15:19:22,592 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 122 predicate places. [2023-08-30 15:19:22,592 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 85 transitions, 996 flow [2023-08-30 15:19:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.25925925925925) internal successors, (2113), 27 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states 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 15:19:22,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:22,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:22,601 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 15:19:22,799 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,SelfDestructingSolverStorable33 [2023-08-30 15:19:22,800 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:22,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -270081403, now seen corresponding path program 3 times [2023-08-30 15:19:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:22,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417097229] [2023-08-30 15:19:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417097229] [2023-08-30 15:19:23,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417097229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755341057] [2023-08-30 15:19:23,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:23,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:23,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:23,030 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 15:19:23,032 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 15:19:23,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:19:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:19:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:23,255 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 15:19:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:23,298 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 20 treesize of output 22 [2023-08-30 15:19:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:23,335 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 20 treesize of output 22 [2023-08-30 15:19:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:23,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:23,558 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_93| Int) (v_ArrVal_1037 (Array Int Int))) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_93|) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1037) c_~A~0.base) (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_93|))))) (< |v_thread2Thread1of1ForFork1_~i~1#1_93| 2))) is different from false [2023-08-30 15:19:23,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:23,614 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 31 treesize of output 32 [2023-08-30 15:19:23,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:23,621 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 89 treesize of output 81 [2023-08-30 15:19:23,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2023-08-30 15:19:23,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 24 [2023-08-30 15:19:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755341057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:23,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:23,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:19:23,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453490797] [2023-08-30 15:19:23,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:23,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:19:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:19:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-30 15:19:23,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:19:23,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 85 transitions, 996 flow. Second operand has 29 states, 29 states have (on average 69.24137931034483) internal successors, (2008), 29 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 15:19:23,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:23,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:19:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:30,949 INFO L130 PetriNetUnfolder]: 2330/4295 cut-off events. [2023-08-30 15:19:30,949 INFO L131 PetriNetUnfolder]: For 38962/39100 co-relation queries the response was YES. [2023-08-30 15:19:30,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25970 conditions, 4295 events. 2330/4295 cut-off events. For 38962/39100 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 29768 event pairs, 269 based on Foata normal form. 394/4685 useless extension candidates. Maximal degree in co-relation 25923. Up to 931 conditions per place. [2023-08-30 15:19:30,974 INFO L137 encePairwiseOnDemand]: 236/247 looper letters, 311 selfloop transitions, 37 changer transitions 55/409 dead transitions. [2023-08-30 15:19:30,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 409 transitions, 5480 flow [2023-08-30 15:19:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:19:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:19:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2243 transitions. [2023-08-30 15:19:30,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026990553306343 [2023-08-30 15:19:30,977 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2243 transitions. [2023-08-30 15:19:30,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2243 transitions. [2023-08-30 15:19:30,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:30,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2243 transitions. [2023-08-30 15:19:30,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.76666666666667) internal successors, (2243), 30 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states 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 15:19:30,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states 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 15:19:30,982 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states 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 15:19:30,982 INFO L175 Difference]: Start difference. First operand has 159 places, 85 transitions, 996 flow. Second operand 30 states and 2243 transitions. [2023-08-30 15:19:30,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 409 transitions, 5480 flow [2023-08-30 15:19:31,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 409 transitions, 5411 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-30 15:19:31,024 INFO L231 Difference]: Finished difference. Result has 183 places, 109 transitions, 1239 flow [2023-08-30 15:19:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1239, PETRI_PLACES=183, PETRI_TRANSITIONS=109} [2023-08-30 15:19:31,024 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 146 predicate places. [2023-08-30 15:19:31,024 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 109 transitions, 1239 flow [2023-08-30 15:19:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.24137931034483) internal successors, (2008), 29 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states 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 15:19:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-30 15:19:31,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 15:19:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 15:19:31,225 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:31,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash 215794124, now seen corresponding path program 3 times [2023-08-30 15:19:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033939471] [2023-08-30 15:19:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:31,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033939471] [2023-08-30 15:19:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033939471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928434735] [2023-08-30 15:19:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:31,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:31,519 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 15:19:31,522 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 15:19:31,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:19:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:19:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:31,767 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 13 treesize of output 9 [2023-08-30 15:19:31,809 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 15:19:31,809 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 25 treesize of output 24 [2023-08-30 15:19:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:31,832 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 15:19:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:31,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:32,122 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:19:32,123 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 31 treesize of output 37 [2023-08-30 15:19:32,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:32,130 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 37 treesize of output 31 [2023-08-30 15:19:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:32,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928434735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:32,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:32,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 15:19:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194930962] [2023-08-30 15:19:32,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:32,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 15:19:32,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 15:19:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1076, Unknown=8, NotChecked=0, Total=1190 [2023-08-30 15:19:32,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:19:32,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 109 transitions, 1239 flow. Second operand has 35 states, 35 states have (on average 81.11428571428571) internal successors, (2839), 35 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states 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 15:19:32,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:32,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:19:32,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:33,609 INFO L130 PetriNetUnfolder]: 2206/4042 cut-off events. [2023-08-30 15:19:33,609 INFO L131 PetriNetUnfolder]: For 48137/48700 co-relation queries the response was YES. [2023-08-30 15:19:33,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25784 conditions, 4042 events. 2206/4042 cut-off events. For 48137/48700 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27764 event pairs, 1463 based on Foata normal form. 564/4562 useless extension candidates. Maximal degree in co-relation 25734. Up to 3036 conditions per place. [2023-08-30 15:19:33,634 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 122 selfloop transitions, 31 changer transitions 4/160 dead transitions. [2023-08-30 15:19:33,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 160 transitions, 2070 flow [2023-08-30 15:19:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:19:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:19:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1268 transitions. [2023-08-30 15:19:33,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34224021592442644 [2023-08-30 15:19:33,637 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1268 transitions. [2023-08-30 15:19:33,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1268 transitions. [2023-08-30 15:19:33,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:33,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1268 transitions. [2023-08-30 15:19:33,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.53333333333333) internal successors, (1268), 15 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states 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 15:19:33,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states 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 15:19:33,640 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states 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 15:19:33,640 INFO L175 Difference]: Start difference. First operand has 183 places, 109 transitions, 1239 flow. Second operand 15 states and 1268 transitions. [2023-08-30 15:19:33,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 160 transitions, 2070 flow [2023-08-30 15:19:33,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 160 transitions, 1981 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 15:19:33,690 INFO L231 Difference]: Finished difference. Result has 193 places, 113 transitions, 1334 flow [2023-08-30 15:19:33,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1334, PETRI_PLACES=193, PETRI_TRANSITIONS=113} [2023-08-30 15:19:33,691 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 156 predicate places. [2023-08-30 15:19:33,691 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 113 transitions, 1334 flow [2023-08-30 15:19:33,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 81.11428571428571) internal successors, (2839), 35 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states 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 15:19:33,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:33,691 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-30 15:19:33,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 15:19:33,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 15:19:33,892 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:33,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 215794123, now seen corresponding path program 4 times [2023-08-30 15:19:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148429507] [2023-08-30 15:19:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:34,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148429507] [2023-08-30 15:19:34,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148429507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:34,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943893726] [2023-08-30 15:19:34,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:34,203 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 15:19:34,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 15:19:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:34,434 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 15:19:34,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:34,462 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 23 treesize of output 22 [2023-08-30 15:19:34,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:34,490 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 15:19:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:34,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:34,638 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1131 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1131) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:19:34,688 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:19:34,688 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 33 treesize of output 39 [2023-08-30 15:19:34,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:34,693 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 43 treesize of output 37 [2023-08-30 15:19:34,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:19:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 15:19:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943893726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:34,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:34,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 15:19:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599632531] [2023-08-30 15:19:34,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:19:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:19:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=889, Unknown=6, NotChecked=60, Total=1056 [2023-08-30 15:19:34,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:19:34,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 113 transitions, 1334 flow. Second operand has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 15:19:34,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:34,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:19:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:35,755 INFO L130 PetriNetUnfolder]: 2061/3763 cut-off events. [2023-08-30 15:19:35,755 INFO L131 PetriNetUnfolder]: For 41865/42445 co-relation queries the response was YES. [2023-08-30 15:19:35,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23891 conditions, 3763 events. 2061/3763 cut-off events. For 41865/42445 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25310 event pairs, 1412 based on Foata normal form. 577/4301 useless extension candidates. Maximal degree in co-relation 23836. Up to 2998 conditions per place. [2023-08-30 15:19:35,779 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 121 selfloop transitions, 30 changer transitions 0/154 dead transitions. [2023-08-30 15:19:35,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 154 transitions, 2024 flow [2023-08-30 15:19:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:19:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:19:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1266 transitions. [2023-08-30 15:19:35,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3417004048582996 [2023-08-30 15:19:35,780 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1266 transitions. [2023-08-30 15:19:35,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1266 transitions. [2023-08-30 15:19:35,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:35,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1266 transitions. [2023-08-30 15:19:35,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.4) internal successors, (1266), 15 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 15:19:35,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states 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 15:19:35,784 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 247.0) internal successors, (3952), 16 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states 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 15:19:35,784 INFO L175 Difference]: Start difference. First operand has 193 places, 113 transitions, 1334 flow. Second operand 15 states and 1266 transitions. [2023-08-30 15:19:35,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 154 transitions, 2024 flow [2023-08-30 15:19:35,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 154 transitions, 1960 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 15:19:35,820 INFO L231 Difference]: Finished difference. Result has 197 places, 111 transitions, 1303 flow [2023-08-30 15:19:35,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1303, PETRI_PLACES=197, PETRI_TRANSITIONS=111} [2023-08-30 15:19:35,820 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 15:19:35,820 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 111 transitions, 1303 flow [2023-08-30 15:19:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 15:19:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:35,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:35,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 15:19:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:36,021 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:36,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash 217413527, now seen corresponding path program 4 times [2023-08-30 15:19:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:36,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445380574] [2023-08-30 15:19:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445380574] [2023-08-30 15:19:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445380574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228636655] [2023-08-30 15:19:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:36,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:36,114 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:36,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 15:19:36,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:19:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:36,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:36,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228636655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:36,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:36,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 15:19:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696147281] [2023-08-30 15:19:36,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:19:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:19:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:19:36,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:19:36,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 111 transitions, 1303 flow. Second operand has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states 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 15:19:36,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:36,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:19:36,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:37,277 INFO L130 PetriNetUnfolder]: 2121/3900 cut-off events. [2023-08-30 15:19:37,277 INFO L131 PetriNetUnfolder]: For 34387/34521 co-relation queries the response was YES. [2023-08-30 15:19:37,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24449 conditions, 3900 events. 2121/3900 cut-off events. For 34387/34521 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25942 event pairs, 1147 based on Foata normal form. 186/4082 useless extension candidates. Maximal degree in co-relation 24395. Up to 2509 conditions per place. [2023-08-30 15:19:37,297 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 86 selfloop transitions, 13 changer transitions 78/181 dead transitions. [2023-08-30 15:19:37,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 181 transitions, 2298 flow [2023-08-30 15:19:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:19:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:19:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-08-30 15:19:37,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-30 15:19:37,298 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-08-30 15:19:37,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-08-30 15:19:37,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:37,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-08-30 15:19:37,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states 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 15:19:37,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:37,315 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 247.0) internal successors, (3211), 13 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states 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 15:19:37,315 INFO L175 Difference]: Start difference. First operand has 197 places, 111 transitions, 1303 flow. Second operand 12 states and 1196 transitions. [2023-08-30 15:19:37,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 181 transitions, 2298 flow [2023-08-30 15:19:37,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 181 transitions, 2240 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-30 15:19:37,353 INFO L231 Difference]: Finished difference. Result has 197 places, 87 transitions, 1045 flow [2023-08-30 15:19:37,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1045, PETRI_PLACES=197, PETRI_TRANSITIONS=87} [2023-08-30 15:19:37,353 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 15:19:37,353 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 87 transitions, 1045 flow [2023-08-30 15:19:37,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.25) internal successors, (2286), 24 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states 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 15:19:37,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:37,354 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:37,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-30 15:19:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 15:19:37,554 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:37,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2140846785, now seen corresponding path program 1 times [2023-08-30 15:19:37,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:37,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260601441] [2023-08-30 15:19:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:37,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:37,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260601441] [2023-08-30 15:19:37,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260601441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047326204] [2023-08-30 15:19:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:37,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:37,600 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:37,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 15:19:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:19:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:37,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047326204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:37,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:37,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 15:19:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385750742] [2023-08-30 15:19:37,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 15:19:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 15:19:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-08-30 15:19:37,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:19:37,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 87 transitions, 1045 flow. Second operand has 11 states, 11 states have (on average 105.63636363636364) internal successors, (1162), 11 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 15:19:37,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:37,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:19:37,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:39,004 INFO L130 PetriNetUnfolder]: 5300/9130 cut-off events. [2023-08-30 15:19:39,005 INFO L131 PetriNetUnfolder]: For 105801/106175 co-relation queries the response was YES. [2023-08-30 15:19:39,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62529 conditions, 9130 events. 5300/9130 cut-off events. For 105801/106175 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 63878 event pairs, 713 based on Foata normal form. 944/10070 useless extension candidates. Maximal degree in co-relation 62474. Up to 2071 conditions per place. [2023-08-30 15:19:39,063 INFO L137 encePairwiseOnDemand]: 243/247 looper letters, 321 selfloop transitions, 27 changer transitions 0/352 dead transitions. [2023-08-30 15:19:39,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 352 transitions, 5325 flow [2023-08-30 15:19:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:19:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:19:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1273 transitions. [2023-08-30 15:19:39,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46853146853146854 [2023-08-30 15:19:39,065 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1273 transitions. [2023-08-30 15:19:39,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1273 transitions. [2023-08-30 15:19:39,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:39,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1273 transitions. [2023-08-30 15:19:39,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.72727272727273) internal successors, (1273), 11 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 15:19:39,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states 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 15:19:39,068 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states 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 15:19:39,068 INFO L175 Difference]: Start difference. First operand has 197 places, 87 transitions, 1045 flow. Second operand 11 states and 1273 transitions. [2023-08-30 15:19:39,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 352 transitions, 5325 flow [2023-08-30 15:19:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 352 transitions, 4925 flow, removed 117 selfloop flow, removed 25 redundant places. [2023-08-30 15:19:39,383 INFO L231 Difference]: Finished difference. Result has 163 places, 102 transitions, 1201 flow [2023-08-30 15:19:39,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1201, PETRI_PLACES=163, PETRI_TRANSITIONS=102} [2023-08-30 15:19:39,384 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 126 predicate places. [2023-08-30 15:19:39,384 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 102 transitions, 1201 flow [2023-08-30 15:19:39,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.63636363636364) internal successors, (1162), 11 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 15:19:39,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:39,384 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:39,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 15:19:39,584 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:39,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1941740290, now seen corresponding path program 1 times [2023-08-30 15:19:39,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:39,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058847908] [2023-08-30 15:19:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:39,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058847908] [2023-08-30 15:19:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058847908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26177872] [2023-08-30 15:19:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:39,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:39,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:39,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:39,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 15:19:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:39,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:19:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:19:39,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:19:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26177872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:19:39,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:19:39,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-08-30 15:19:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590659013] [2023-08-30 15:19:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:19:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:19:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:19:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:19:39,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:19:39,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 102 transitions, 1201 flow. Second operand has 7 states, 7 states have (on average 105.71428571428571) internal successors, (740), 7 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 15:19:39,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:39,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:19:39,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:40,736 INFO L130 PetriNetUnfolder]: 4539/8247 cut-off events. [2023-08-30 15:19:40,736 INFO L131 PetriNetUnfolder]: For 58566/58928 co-relation queries the response was YES. [2023-08-30 15:19:40,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53811 conditions, 8247 events. 4539/8247 cut-off events. For 58566/58928 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 60784 event pairs, 80 based on Foata normal form. 1094/9337 useless extension candidates. Maximal degree in co-relation 53766. Up to 5304 conditions per place. [2023-08-30 15:19:40,788 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 203 selfloop transitions, 11 changer transitions 0/218 dead transitions. [2023-08-30 15:19:40,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 218 transitions, 3066 flow [2023-08-30 15:19:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:19:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:19:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 800 transitions. [2023-08-30 15:19:40,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626951995373048 [2023-08-30 15:19:40,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 800 transitions. [2023-08-30 15:19:40,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 800 transitions. [2023-08-30 15:19:40,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:40,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 800 transitions. [2023-08-30 15:19:40,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 15:19:40,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:19:40,791 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 15:19:40,791 INFO L175 Difference]: Start difference. First operand has 163 places, 102 transitions, 1201 flow. Second operand 7 states and 800 transitions. [2023-08-30 15:19:40,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 218 transitions, 3066 flow [2023-08-30 15:19:40,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 218 transitions, 3050 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:19:40,840 INFO L231 Difference]: Finished difference. Result has 164 places, 90 transitions, 1011 flow [2023-08-30 15:19:40,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=164, PETRI_TRANSITIONS=90} [2023-08-30 15:19:40,840 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 127 predicate places. [2023-08-30 15:19:40,840 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 90 transitions, 1011 flow [2023-08-30 15:19:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.71428571428571) internal successors, (740), 7 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 15:19:40,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:40,841 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:40,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 15:19:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 15:19:41,041 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:41,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2140846846, now seen corresponding path program 5 times [2023-08-30 15:19:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250124824] [2023-08-30 15:19:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:41,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250124824] [2023-08-30 15:19:41,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250124824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:41,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508103639] [2023-08-30 15:19:41,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:19:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:41,306 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:41,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 15:19:41,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:19:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:19:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:41,540 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 15:19:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:41,570 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 15:19:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:41,597 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 15:19:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:41,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:41,807 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 27 treesize of output 28 [2023-08-30 15:19:41,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:41,813 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 71 treesize of output 65 [2023-08-30 15:19:41,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 46 [2023-08-30 15:19:41,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-08-30 15:19:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508103639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:41,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:41,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 15:19:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014700414] [2023-08-30 15:19:41,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:19:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:19:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=939, Unknown=12, NotChecked=0, Total=1056 [2023-08-30 15:19:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 247 [2023-08-30 15:19:43,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 90 transitions, 1011 flow. Second operand has 33 states, 33 states have (on average 91.21212121212122) internal successors, (3010), 33 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states 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 15:19:43,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:43,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 247 [2023-08-30 15:19:43,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:44,379 INFO L130 PetriNetUnfolder]: 4388/7974 cut-off events. [2023-08-30 15:19:44,379 INFO L131 PetriNetUnfolder]: For 58384/58734 co-relation queries the response was YES. [2023-08-30 15:19:44,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 7974 events. 4388/7974 cut-off events. For 58384/58734 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 58461 event pairs, 2165 based on Foata normal form. 472/8442 useless extension candidates. Maximal degree in co-relation 52160. Up to 4531 conditions per place. [2023-08-30 15:19:44,437 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 210 selfloop transitions, 21 changer transitions 0/235 dead transitions. [2023-08-30 15:19:44,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 235 transitions, 3319 flow [2023-08-30 15:19:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:19:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:19:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1342 transitions. [2023-08-30 15:19:44,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880855986119144 [2023-08-30 15:19:44,439 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1342 transitions. [2023-08-30 15:19:44,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1342 transitions. [2023-08-30 15:19:44,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:44,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1342 transitions. [2023-08-30 15:19:44,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 95.85714285714286) internal successors, (1342), 14 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 15:19:44,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:44,446 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:44,446 INFO L175 Difference]: Start difference. First operand has 164 places, 90 transitions, 1011 flow. Second operand 14 states and 1342 transitions. [2023-08-30 15:19:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 235 transitions, 3319 flow [2023-08-30 15:19:44,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 235 transitions, 3294 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 15:19:44,505 INFO L231 Difference]: Finished difference. Result has 174 places, 91 transitions, 1055 flow [2023-08-30 15:19:44,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1055, PETRI_PLACES=174, PETRI_TRANSITIONS=91} [2023-08-30 15:19:44,505 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 137 predicate places. [2023-08-30 15:19:44,505 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 91 transitions, 1055 flow [2023-08-30 15:19:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.21212121212122) internal successors, (3010), 33 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states 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 15:19:44,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:44,506 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:44,706 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:44,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1831633926, now seen corresponding path program 4 times [2023-08-30 15:19:44,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432470117] [2023-08-30 15:19:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:45,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432470117] [2023-08-30 15:19:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432470117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201990144] [2023-08-30 15:19:45,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:45,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:45,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:45,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 15:19:45,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:45,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:19:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:45,297 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 15:19:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:45,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 15:19:45,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:45,359 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 15:19:45,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:45,389 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 15:19:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:45,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:45,665 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:19:45,666 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 34 treesize of output 40 [2023-08-30 15:19:45,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:45,679 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 141 treesize of output 129 [2023-08-30 15:19:45,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:19:45,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:19:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201990144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:45,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 15:19:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667675423] [2023-08-30 15:19:45,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:19:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:19:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1127, Unknown=14, NotChecked=0, Total=1260 [2023-08-30 15:19:46,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:19:46,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 91 transitions, 1055 flow. Second operand has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 15:19:46,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:46,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:19:46,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:47,602 INFO L130 PetriNetUnfolder]: 4281/7758 cut-off events. [2023-08-30 15:19:47,603 INFO L131 PetriNetUnfolder]: For 67859/68405 co-relation queries the response was YES. [2023-08-30 15:19:47,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52487 conditions, 7758 events. 4281/7758 cut-off events. For 67859/68405 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 57568 event pairs, 2109 based on Foata normal form. 607/8351 useless extension candidates. Maximal degree in co-relation 52438. Up to 3333 conditions per place. [2023-08-30 15:19:47,649 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 221 selfloop transitions, 33 changer transitions 5/261 dead transitions. [2023-08-30 15:19:47,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 261 transitions, 3508 flow [2023-08-30 15:19:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:19:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:19:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1168 transitions. [2023-08-30 15:19:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3377674956622325 [2023-08-30 15:19:47,651 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1168 transitions. [2023-08-30 15:19:47,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1168 transitions. [2023-08-30 15:19:47,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:47,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1168 transitions. [2023-08-30 15:19:47,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.42857142857143) internal successors, (1168), 14 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 15:19:47,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:47,654 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:47,654 INFO L175 Difference]: Start difference. First operand has 174 places, 91 transitions, 1055 flow. Second operand 14 states and 1168 transitions. [2023-08-30 15:19:47,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 261 transitions, 3508 flow [2023-08-30 15:19:47,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3359 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 15:19:47,711 INFO L231 Difference]: Finished difference. Result has 178 places, 92 transitions, 1127 flow [2023-08-30 15:19:47,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1127, PETRI_PLACES=178, PETRI_TRANSITIONS=92} [2023-08-30 15:19:47,711 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 141 predicate places. [2023-08-30 15:19:47,712 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 92 transitions, 1127 flow [2023-08-30 15:19:47,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 15:19:47,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:47,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:47,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 15:19:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 15:19:47,912 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:47,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1831633925, now seen corresponding path program 3 times [2023-08-30 15:19:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695267666] [2023-08-30 15:19:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:48,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695267666] [2023-08-30 15:19:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695267666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239524360] [2023-08-30 15:19:48,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:19:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:48,243 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:48,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 15:19:48,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:19:48,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:19:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:48,534 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 15:19:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:48,566 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 23 treesize of output 22 [2023-08-30 15:19:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:48,596 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 15:19:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:48,623 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 15:19:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:48,800 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1402) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1403) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:19:48,854 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:19:48,854 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 36 treesize of output 42 [2023-08-30 15:19:48,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:48,859 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 81 treesize of output 75 [2023-08-30 15:19:48,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:19:48,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:19:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 15:19:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239524360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:48,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 15:19:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743954575] [2023-08-30 15:19:48,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:19:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:19:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1069, Unknown=11, NotChecked=66, Total=1260 [2023-08-30 15:19:49,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:19:49,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 92 transitions, 1127 flow. Second operand has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 15:19:49,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:49,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:19:49,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:50,455 INFO L130 PetriNetUnfolder]: 4190/7606 cut-off events. [2023-08-30 15:19:50,455 INFO L131 PetriNetUnfolder]: For 67738/68270 co-relation queries the response was YES. [2023-08-30 15:19:50,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52088 conditions, 7606 events. 4190/7606 cut-off events. For 67738/68270 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 55944 event pairs, 2217 based on Foata normal form. 593/8185 useless extension candidates. Maximal degree in co-relation 52038. Up to 3333 conditions per place. [2023-08-30 15:19:50,506 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 220 selfloop transitions, 33 changer transitions 5/260 dead transitions. [2023-08-30 15:19:50,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 260 transitions, 3425 flow [2023-08-30 15:19:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:19:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:19:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1167 transitions. [2023-08-30 15:19:50,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374783111625217 [2023-08-30 15:19:50,508 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1167 transitions. [2023-08-30 15:19:50,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1167 transitions. [2023-08-30 15:19:50,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:50,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1167 transitions. [2023-08-30 15:19:50,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 15:19:50,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:50,511 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:19:50,511 INFO L175 Difference]: Start difference. First operand has 178 places, 92 transitions, 1127 flow. Second operand 14 states and 1167 transitions. [2023-08-30 15:19:50,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 260 transitions, 3425 flow [2023-08-30 15:19:50,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3323 flow, removed 6 selfloop flow, removed 14 redundant places. [2023-08-30 15:19:50,571 INFO L231 Difference]: Finished difference. Result has 177 places, 91 transitions, 1069 flow [2023-08-30 15:19:50,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1069, PETRI_PLACES=177, PETRI_TRANSITIONS=91} [2023-08-30 15:19:50,572 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2023-08-30 15:19:50,572 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 91 transitions, 1069 flow [2023-08-30 15:19:50,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.13888888888889) internal successors, (2813), 36 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 15:19:50,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:50,572 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 15:19:50,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:50,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:50,773 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:50,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1900314435, now seen corresponding path program 4 times [2023-08-30 15:19:50,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:50,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265332299] [2023-08-30 15:19:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265332299] [2023-08-30 15:19:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265332299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020331313] [2023-08-30 15:19:51,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:51,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:51,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:51,067 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:51,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 15:19:51,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:51,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 15:19:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:51,321 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 15:19:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:51,345 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 15:19:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:51,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:51,528 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1448 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1448) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:19:51,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:51,533 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 24 treesize of output 25 [2023-08-30 15:19:51,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:51,538 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 37 treesize of output 31 [2023-08-30 15:19:51,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-08-30 15:19:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 15:19:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020331313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:51,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:51,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 15:19:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782960120] [2023-08-30 15:19:51,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:19:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:19:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2023-08-30 15:19:51,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:19:51,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 91 transitions, 1069 flow. Second operand has 36 states, 36 states have (on average 81.11111111111111) internal successors, (2920), 36 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 15:19:51,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:51,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:19:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:53,056 INFO L130 PetriNetUnfolder]: 4158/7514 cut-off events. [2023-08-30 15:19:53,056 INFO L131 PetriNetUnfolder]: For 59779/60260 co-relation queries the response was YES. [2023-08-30 15:19:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50706 conditions, 7514 events. 4158/7514 cut-off events. For 59779/60260 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 53895 event pairs, 3213 based on Foata normal form. 474/7954 useless extension candidates. Maximal degree in co-relation 50659. Up to 4140 conditions per place. [2023-08-30 15:19:53,109 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 129 selfloop transitions, 30 changer transitions 0/161 dead transitions. [2023-08-30 15:19:53,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 161 transitions, 2134 flow [2023-08-30 15:19:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:19:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:19:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1519 transitions. [2023-08-30 15:19:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34165542060278903 [2023-08-30 15:19:53,111 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1519 transitions. [2023-08-30 15:19:53,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1519 transitions. [2023-08-30 15:19:53,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:53,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1519 transitions. [2023-08-30 15:19:53,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.38888888888889) internal successors, (1519), 18 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states 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 15:19:53,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:53,114 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:53,114 INFO L175 Difference]: Start difference. First operand has 177 places, 91 transitions, 1069 flow. Second operand 18 states and 1519 transitions. [2023-08-30 15:19:53,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 161 transitions, 2134 flow [2023-08-30 15:19:53,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 161 transitions, 2054 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-30 15:19:53,163 INFO L231 Difference]: Finished difference. Result has 188 places, 102 transitions, 1192 flow [2023-08-30 15:19:53,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1192, PETRI_PLACES=188, PETRI_TRANSITIONS=102} [2023-08-30 15:19:53,163 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2023-08-30 15:19:53,163 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 102 transitions, 1192 flow [2023-08-30 15:19:53,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.11111111111111) internal successors, (2920), 36 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 15:19:53,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:53,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-30 15:19:53,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-30 15:19:53,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 15:19:53,364 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:53,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1900314436, now seen corresponding path program 5 times [2023-08-30 15:19:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697340365] [2023-08-30 15:19:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:53,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697340365] [2023-08-30 15:19:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697340365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593889027] [2023-08-30 15:19:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:19:53,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:53,665 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:53,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 15:19:53,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:19:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 15:19:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:53,946 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 15:19:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:53,976 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 15:19:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:54,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:54,166 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1493 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1493) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:19:54,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:54,172 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 26 treesize of output 27 [2023-08-30 15:19:54,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:54,176 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 43 treesize of output 37 [2023-08-30 15:19:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:19:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-30 15:19:54,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593889027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:54,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:54,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 15:19:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776419165] [2023-08-30 15:19:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:54,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:19:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:19:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2023-08-30 15:19:54,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:19:54,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 102 transitions, 1192 flow. Second operand has 36 states, 36 states have (on average 81.11111111111111) internal successors, (2920), 36 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 15:19:54,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:54,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:19:54,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:55,815 INFO L130 PetriNetUnfolder]: 4127/7423 cut-off events. [2023-08-30 15:19:55,815 INFO L131 PetriNetUnfolder]: For 54922/55374 co-relation queries the response was YES. [2023-08-30 15:19:55,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49667 conditions, 7423 events. 4127/7423 cut-off events. For 54922/55374 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 52721 event pairs, 3002 based on Foata normal form. 449/7837 useless extension candidates. Maximal degree in co-relation 49615. Up to 4048 conditions per place. [2023-08-30 15:19:55,857 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 128 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2023-08-30 15:19:55,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 159 transitions, 2127 flow [2023-08-30 15:19:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:19:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:19:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1518 transitions. [2023-08-30 15:19:55,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34143049932523617 [2023-08-30 15:19:55,859 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1518 transitions. [2023-08-30 15:19:55,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1518 transitions. [2023-08-30 15:19:55,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:55,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1518 transitions. [2023-08-30 15:19:55,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.33333333333333) internal successors, (1518), 18 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 15:19:55,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:55,862 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:55,862 INFO L175 Difference]: Start difference. First operand has 188 places, 102 transitions, 1192 flow. Second operand 18 states and 1518 transitions. [2023-08-30 15:19:55,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 159 transitions, 2127 flow [2023-08-30 15:19:55,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 159 transitions, 2075 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 15:19:55,903 INFO L231 Difference]: Finished difference. Result has 197 places, 100 transitions, 1177 flow [2023-08-30 15:19:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1177, PETRI_PLACES=197, PETRI_TRANSITIONS=100} [2023-08-30 15:19:55,903 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 15:19:55,903 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 100 transitions, 1177 flow [2023-08-30 15:19:55,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.11111111111111) internal successors, (2920), 36 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states 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 15:19:55,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:55,904 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:55,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-30 15:19:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:56,109 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:56,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1941740327, now seen corresponding path program 6 times [2023-08-30 15:19:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982741452] [2023-08-30 15:19:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982741452] [2023-08-30 15:19:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982741452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088731504] [2023-08-30 15:19:56,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:19:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:56,224 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:56,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 15:19:56,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:19:56,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:19:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:56,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:56,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088731504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:56,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:56,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 15:19:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982087998] [2023-08-30 15:19:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:56,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:19:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:19:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-30 15:19:56,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:19:56,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 100 transitions, 1177 flow. Second operand has 29 states, 29 states have (on average 95.20689655172414) internal successors, (2761), 29 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states 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 15:19:56,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:56,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:19:56,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:19:57,776 INFO L130 PetriNetUnfolder]: 3217/5872 cut-off events. [2023-08-30 15:19:57,777 INFO L131 PetriNetUnfolder]: For 40658/40700 co-relation queries the response was YES. [2023-08-30 15:19:57,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38700 conditions, 5872 events. 3217/5872 cut-off events. For 40658/40700 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 40148 event pairs, 1554 based on Foata normal form. 148/6020 useless extension candidates. Maximal degree in co-relation 38649. Up to 3410 conditions per place. [2023-08-30 15:19:57,807 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 66 selfloop transitions, 10 changer transitions 171/249 dead transitions. [2023-08-30 15:19:57,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 249 transitions, 3026 flow [2023-08-30 15:19:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:19:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:19:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1800 transitions. [2023-08-30 15:19:57,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048582995951417 [2023-08-30 15:19:57,809 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1800 transitions. [2023-08-30 15:19:57,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1800 transitions. [2023-08-30 15:19:57,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:19:57,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1800 transitions. [2023-08-30 15:19:57,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 100.0) internal successors, (1800), 18 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states 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 15:19:57,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:57,813 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:19:57,813 INFO L175 Difference]: Start difference. First operand has 197 places, 100 transitions, 1177 flow. Second operand 18 states and 1800 transitions. [2023-08-30 15:19:57,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 249 transitions, 3026 flow [2023-08-30 15:19:57,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 249 transitions, 2883 flow, removed 29 selfloop flow, removed 18 redundant places. [2023-08-30 15:19:57,850 INFO L231 Difference]: Finished difference. Result has 196 places, 66 transitions, 748 flow [2023-08-30 15:19:57,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=748, PETRI_PLACES=196, PETRI_TRANSITIONS=66} [2023-08-30 15:19:57,850 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 159 predicate places. [2023-08-30 15:19:57,850 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 66 transitions, 748 flow [2023-08-30 15:19:57,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.20689655172414) internal successors, (2761), 29 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states 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 15:19:57,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:57,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:57,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 15:19:58,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 15:19:58,056 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:19:58,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1219796692, now seen corresponding path program 4 times [2023-08-30 15:19:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:58,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496903326] [2023-08-30 15:19:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496903326] [2023-08-30 15:19:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496903326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287298847] [2023-08-30 15:19:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:19:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:58,431 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:58,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 15:19:58,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:19:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:19:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:58,719 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 15:19:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:58,749 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 15:19:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:19:58,904 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 15:19:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:58,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:59,015 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 8)) 9223372039002259456))) is different from false [2023-08-30 15:19:59,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:59,143 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 29 treesize of output 30 [2023-08-30 15:19:59,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:19:59,148 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 81 treesize of output 75 [2023-08-30 15:19:59,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:19:59,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:19:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-30 15:19:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287298847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:59,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-30 15:19:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180691435] [2023-08-30 15:19:59,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 15:19:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 15:19:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1394, Unknown=31, NotChecked=76, Total=1640 [2023-08-30 15:19:59,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:19:59,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 66 transitions, 748 flow. Second operand has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states 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 15:19:59,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:59,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:19:59,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:00,690 INFO L130 PetriNetUnfolder]: 2497/4539 cut-off events. [2023-08-30 15:20:00,690 INFO L131 PetriNetUnfolder]: For 32950/33278 co-relation queries the response was YES. [2023-08-30 15:20:00,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30942 conditions, 4539 events. 2497/4539 cut-off events. For 32950/33278 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 30982 event pairs, 1056 based on Foata normal form. 389/4928 useless extension candidates. Maximal degree in co-relation 30891. Up to 1502 conditions per place. [2023-08-30 15:20:00,715 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 187 selfloop transitions, 24 changer transitions 0/212 dead transitions. [2023-08-30 15:20:00,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 212 transitions, 2749 flow [2023-08-30 15:20:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:20:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:20:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1335 transitions. [2023-08-30 15:20:00,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33780364372469635 [2023-08-30 15:20:00,717 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1335 transitions. [2023-08-30 15:20:00,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1335 transitions. [2023-08-30 15:20:00,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:00,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1335 transitions. [2023-08-30 15:20:00,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.4375) internal successors, (1335), 16 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 15:20:00,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:00,720 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:00,720 INFO L175 Difference]: Start difference. First operand has 196 places, 66 transitions, 748 flow. Second operand 16 states and 1335 transitions. [2023-08-30 15:20:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 212 transitions, 2749 flow [2023-08-30 15:20:00,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 212 transitions, 2589 flow, removed 37 selfloop flow, removed 21 redundant places. [2023-08-30 15:20:00,788 INFO L231 Difference]: Finished difference. Result has 168 places, 67 transitions, 754 flow [2023-08-30 15:20:00,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=754, PETRI_PLACES=168, PETRI_TRANSITIONS=67} [2023-08-30 15:20:00,788 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2023-08-30 15:20:00,788 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 67 transitions, 754 flow [2023-08-30 15:20:00,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.09756097560975) internal successors, (3202), 41 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states 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 15:20:00,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:00,789 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:00,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 15:20:00,993 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:00,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 962134613, now seen corresponding path program 5 times [2023-08-30 15:20:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525907888] [2023-08-30 15:20:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525907888] [2023-08-30 15:20:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525907888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799915389] [2023-08-30 15:20:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:01,357 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 15:20:01,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:20:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:20:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:01,656 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 15:20:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:01,686 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 15:20:01,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:01,737 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 15:20:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:01,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:01,909 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1635 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1635) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 16)) 4294967296)) is different from false [2023-08-30 15:20:01,912 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1635 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1635) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296)) is different from false [2023-08-30 15:20:01,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:01,968 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 27 treesize of output 28 [2023-08-30 15:20:01,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:01,977 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 141 treesize of output 129 [2023-08-30 15:20:01,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:20:01,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:20:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:02,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799915389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:02,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:02,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-30 15:20:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544419762] [2023-08-30 15:20:02,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 15:20:02,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 15:20:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1288, Unknown=9, NotChecked=146, Total=1560 [2023-08-30 15:20:02,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:20:02,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 67 transitions, 754 flow. Second operand has 40 states, 40 states have (on average 78.125) internal successors, (3125), 40 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states 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 15:20:02,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:02,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:20:02,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:03,406 INFO L130 PetriNetUnfolder]: 2406/4387 cut-off events. [2023-08-30 15:20:03,406 INFO L131 PetriNetUnfolder]: For 30230/30546 co-relation queries the response was YES. [2023-08-30 15:20:03,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29748 conditions, 4387 events. 2406/4387 cut-off events. For 30230/30546 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 29758 event pairs, 1056 based on Foata normal form. 377/4764 useless extension candidates. Maximal degree in co-relation 29703. Up to 1502 conditions per place. [2023-08-30 15:20:03,429 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 186 selfloop transitions, 24 changer transitions 0/211 dead transitions. [2023-08-30 15:20:03,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 211 transitions, 2633 flow [2023-08-30 15:20:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:20:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:20:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1334 transitions. [2023-08-30 15:20:03,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375506072874494 [2023-08-30 15:20:03,431 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1334 transitions. [2023-08-30 15:20:03,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1334 transitions. [2023-08-30 15:20:03,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:03,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1334 transitions. [2023-08-30 15:20:03,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.375) internal successors, (1334), 16 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states 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 15:20:03,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:03,434 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:03,434 INFO L175 Difference]: Start difference. First operand has 168 places, 67 transitions, 754 flow. Second operand 16 states and 1334 transitions. [2023-08-30 15:20:03,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 211 transitions, 2633 flow [2023-08-30 15:20:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 211 transitions, 2572 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-08-30 15:20:03,459 INFO L231 Difference]: Finished difference. Result has 168 places, 66 transitions, 722 flow [2023-08-30 15:20:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=722, PETRI_PLACES=168, PETRI_TRANSITIONS=66} [2023-08-30 15:20:03,459 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2023-08-30 15:20:03,459 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 66 transitions, 722 flow [2023-08-30 15:20:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 78.125) internal successors, (3125), 40 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states 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 15:20:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 15:20:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:03,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 15:20:03,660 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:03,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1219796972, now seen corresponding path program 5 times [2023-08-30 15:20:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42122384] [2023-08-30 15:20:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:03,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42122384] [2023-08-30 15:20:03,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42122384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:03,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299468101] [2023-08-30 15:20:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:03,806 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 15:20:03,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:20:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:20:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:04,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299468101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:04,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:04,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 15:20:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467245858] [2023-08-30 15:20:04,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:20:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:20:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:20:04,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:20:04,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 66 transitions, 722 flow. Second operand has 34 states, 34 states have (on average 95.11764705882354) internal successors, (3234), 34 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states 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 15:20:04,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:04,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:20:04,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:05,663 INFO L130 PetriNetUnfolder]: 3852/6964 cut-off events. [2023-08-30 15:20:05,663 INFO L131 PetriNetUnfolder]: For 47570/48091 co-relation queries the response was YES. [2023-08-30 15:20:05,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44475 conditions, 6964 events. 3852/6964 cut-off events. For 47570/48091 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 51362 event pairs, 1177 based on Foata normal form. 735/7699 useless extension candidates. Maximal degree in co-relation 44432. Up to 2460 conditions per place. [2023-08-30 15:20:05,699 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 271 selfloop transitions, 30 changer transitions 52/354 dead transitions. [2023-08-30 15:20:05,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 354 transitions, 4153 flow [2023-08-30 15:20:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:20:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:20:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2132 transitions. [2023-08-30 15:20:05,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2023-08-30 15:20:05,701 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2132 transitions. [2023-08-30 15:20:05,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2132 transitions. [2023-08-30 15:20:05,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:05,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2132 transitions. [2023-08-30 15:20:05,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states 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 15:20:05,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:20:05,705 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:20:05,705 INFO L175 Difference]: Start difference. First operand has 168 places, 66 transitions, 722 flow. Second operand 21 states and 2132 transitions. [2023-08-30 15:20:05,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 354 transitions, 4153 flow [2023-08-30 15:20:05,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 354 transitions, 4071 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-30 15:20:05,735 INFO L231 Difference]: Finished difference. Result has 186 places, 87 transitions, 1049 flow [2023-08-30 15:20:05,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1049, PETRI_PLACES=186, PETRI_TRANSITIONS=87} [2023-08-30 15:20:05,736 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 149 predicate places. [2023-08-30 15:20:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 87 transitions, 1049 flow [2023-08-30 15:20:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.11764705882354) internal successors, (3234), 34 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states 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 15:20:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:05,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 15:20:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 15:20:05,937 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:05,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2062492920, now seen corresponding path program 4 times [2023-08-30 15:20:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:05,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180896742] [2023-08-30 15:20:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:06,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:06,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180896742] [2023-08-30 15:20:06,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180896742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:06,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644004040] [2023-08-30 15:20:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:20:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:06,262 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:06,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 15:20:06,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:20:06,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:20:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:06,537 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 15:20:06,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:06,569 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 23 treesize of output 22 [2023-08-30 15:20:06,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:06,598 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 15:20:06,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:06,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:20:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:06,772 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1729 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1729) c_~A~0.base) (+ c_~A~0.offset 12)) 4294967296))) is different from false [2023-08-30 15:20:06,866 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:20:06,867 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 36 treesize of output 42 [2023-08-30 15:20:06,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:06,872 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 81 treesize of output 75 [2023-08-30 15:20:06,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:20:06,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:20:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644004040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:06,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:06,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-30 15:20:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929964599] [2023-08-30 15:20:06,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:06,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:20:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:20:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1070, Unknown=7, NotChecked=66, Total=1260 [2023-08-30 15:20:07,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:20:07,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 87 transitions, 1049 flow. Second operand has 36 states, 36 states have (on average 78.19444444444444) internal successors, (2815), 36 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 15:20:07,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:07,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:20:07,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:08,395 INFO L130 PetriNetUnfolder]: 3705/6749 cut-off events. [2023-08-30 15:20:08,395 INFO L131 PetriNetUnfolder]: For 50315/50602 co-relation queries the response was YES. [2023-08-30 15:20:08,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 6749 events. 3705/6749 cut-off events. For 50315/50602 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 48176 event pairs, 1758 based on Foata normal form. 383/7128 useless extension candidates. Maximal degree in co-relation 44920. Up to 3702 conditions per place. [2023-08-30 15:20:08,439 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 225 selfloop transitions, 15 changer transitions 0/244 dead transitions. [2023-08-30 15:20:08,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 3590 flow [2023-08-30 15:20:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:20:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:20:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1159 transitions. [2023-08-30 15:20:08,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33516483516483514 [2023-08-30 15:20:08,441 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1159 transitions. [2023-08-30 15:20:08,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1159 transitions. [2023-08-30 15:20:08,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:08,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1159 transitions. [2023-08-30 15:20:08,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.78571428571429) internal successors, (1159), 14 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states 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 15:20:08,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:20:08,444 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states 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 15:20:08,444 INFO L175 Difference]: Start difference. First operand has 186 places, 87 transitions, 1049 flow. Second operand 14 states and 1159 transitions. [2023-08-30 15:20:08,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 3590 flow [2023-08-30 15:20:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 244 transitions, 3454 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-08-30 15:20:08,502 INFO L231 Difference]: Finished difference. Result has 191 places, 86 transitions, 1011 flow [2023-08-30 15:20:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1011, PETRI_PLACES=191, PETRI_TRANSITIONS=86} [2023-08-30 15:20:08,502 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 154 predicate places. [2023-08-30 15:20:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 86 transitions, 1011 flow [2023-08-30 15:20:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.19444444444444) internal successors, (2815), 36 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 15:20:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:08,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-30 15:20:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 15:20:08,703 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:08,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash -487226491, now seen corresponding path program 5 times [2023-08-30 15:20:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881145479] [2023-08-30 15:20:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:08,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:09,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:09,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881145479] [2023-08-30 15:20:09,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881145479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:09,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337430632] [2023-08-30 15:20:09,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:09,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:09,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:09,035 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:09,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 15:20:09,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:20:09,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:20:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:09,375 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 15:20:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:09,408 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 15:20:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:09,435 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 15:20:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:09,635 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1779 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1779) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296))) is different from false [2023-08-30 15:20:09,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:09,675 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 29 treesize of output 30 [2023-08-30 15:20:09,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:09,680 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 159 treesize of output 147 [2023-08-30 15:20:09,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2023-08-30 15:20:09,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 20 [2023-08-30 15:20:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:09,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337430632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:09,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:09,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 15:20:09,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227093585] [2023-08-30 15:20:09,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:09,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:20:09,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:20:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=5, NotChecked=72, Total=1482 [2023-08-30 15:20:09,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:20:09,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 86 transitions, 1011 flow. Second operand has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states 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 15:20:09,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:09,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:20:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:11,366 INFO L130 PetriNetUnfolder]: 3582/6526 cut-off events. [2023-08-30 15:20:11,366 INFO L131 PetriNetUnfolder]: For 46930/47203 co-relation queries the response was YES. [2023-08-30 15:20:11,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43238 conditions, 6526 events. 3582/6526 cut-off events. For 46930/47203 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 46365 event pairs, 1419 based on Foata normal form. 373/6895 useless extension candidates. Maximal degree in co-relation 43185. Up to 3033 conditions per place. [2023-08-30 15:20:11,408 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 253 selfloop transitions, 17 changer transitions 0/274 dead transitions. [2023-08-30 15:20:11,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 274 transitions, 3918 flow [2023-08-30 15:20:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:20:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:20:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1325 transitions. [2023-08-30 15:20:11,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352732793522267 [2023-08-30 15:20:11,414 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1325 transitions. [2023-08-30 15:20:11,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1325 transitions. [2023-08-30 15:20:11,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:11,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1325 transitions. [2023-08-30 15:20:11,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.8125) internal successors, (1325), 16 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states 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 15:20:11,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:11,417 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:11,417 INFO L175 Difference]: Start difference. First operand has 191 places, 86 transitions, 1011 flow. Second operand 16 states and 1325 transitions. [2023-08-30 15:20:11,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 274 transitions, 3918 flow [2023-08-30 15:20:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 274 transitions, 3888 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-08-30 15:20:11,471 INFO L231 Difference]: Finished difference. Result has 197 places, 87 transitions, 1041 flow [2023-08-30 15:20:11,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1041, PETRI_PLACES=197, PETRI_TRANSITIONS=87} [2023-08-30 15:20:11,472 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 15:20:11,472 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 87 transitions, 1041 flow [2023-08-30 15:20:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states 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 15:20:11,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:11,472 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:11,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:11,673 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:11,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -487226492, now seen corresponding path program 7 times [2023-08-30 15:20:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:11,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393449272] [2023-08-30 15:20:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:11,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:11,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393449272] [2023-08-30 15:20:11,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393449272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:11,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211860078] [2023-08-30 15:20:11,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:20:11,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:11,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:11,986 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:11,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 15:20:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:20:12,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:12,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2023-08-30 15:20:12,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:20:12,322 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 15:20:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:12,349 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 15:20:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:12,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:12,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:12,615 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 27 treesize of output 28 [2023-08-30 15:20:12,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:12,630 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 71 treesize of output 65 [2023-08-30 15:20:12,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 46 [2023-08-30 15:20:12,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-08-30 15:20:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:12,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211860078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:12,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:12,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-30 15:20:12,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209923455] [2023-08-30 15:20:12,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:20:12,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:20:12,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1348, Unknown=10, NotChecked=0, Total=1482 [2023-08-30 15:20:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:20:13,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 87 transitions, 1041 flow. Second operand has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states 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 15:20:13,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:13,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:20:13,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:15,432 INFO L130 PetriNetUnfolder]: 3459/6303 cut-off events. [2023-08-30 15:20:15,432 INFO L131 PetriNetUnfolder]: For 48449/48712 co-relation queries the response was YES. [2023-08-30 15:20:15,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42762 conditions, 6303 events. 3459/6303 cut-off events. For 48449/48712 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 44406 event pairs, 1419 based on Foata normal form. 363/6662 useless extension candidates. Maximal degree in co-relation 42708. Up to 3033 conditions per place. [2023-08-30 15:20:15,476 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 252 selfloop transitions, 17 changer transitions 0/273 dead transitions. [2023-08-30 15:20:15,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 273 transitions, 3918 flow [2023-08-30 15:20:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:20:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:20:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1324 transitions. [2023-08-30 15:20:15,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350202429149798 [2023-08-30 15:20:15,478 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1324 transitions. [2023-08-30 15:20:15,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1324 transitions. [2023-08-30 15:20:15,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:15,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1324 transitions. [2023-08-30 15:20:15,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.75) internal successors, (1324), 16 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 15:20:15,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:15,481 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:20:15,481 INFO L175 Difference]: Start difference. First operand has 197 places, 87 transitions, 1041 flow. Second operand 16 states and 1324 transitions. [2023-08-30 15:20:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 273 transitions, 3918 flow [2023-08-30 15:20:15,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 273 transitions, 3872 flow, removed 3 selfloop flow, removed 15 redundant places. [2023-08-30 15:20:15,532 INFO L231 Difference]: Finished difference. Result has 197 places, 86 transitions, 1015 flow [2023-08-30 15:20:15,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1015, PETRI_PLACES=197, PETRI_TRANSITIONS=86} [2023-08-30 15:20:15,533 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 160 predicate places. [2023-08-30 15:20:15,533 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 86 transitions, 1015 flow [2023-08-30 15:20:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.17948717948718) internal successors, (3049), 39 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states 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 15:20:15,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:15,533 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-30 15:20:15,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 15:20:15,734 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:15,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1620656489, now seen corresponding path program 6 times [2023-08-30 15:20:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:15,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718219304] [2023-08-30 15:20:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:16,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718219304] [2023-08-30 15:20:16,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718219304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:16,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005629118] [2023-08-30 15:20:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:16,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:16,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:16,089 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:16,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 15:20:16,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 15:20:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 15:20:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:16,458 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 15:20:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:16,484 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 15:20:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:16,733 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1880 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1880) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:20:16,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:16,738 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 24 treesize of output 25 [2023-08-30 15:20:16,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:16,742 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 37 treesize of output 31 [2023-08-30 15:20:16,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-08-30 15:20:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 15:20:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005629118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:16,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:16,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-30 15:20:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543011069] [2023-08-30 15:20:16,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 15:20:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 15:20:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1514, Unknown=1, NotChecked=78, Total=1722 [2023-08-30 15:20:16,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:20:16,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 86 transitions, 1015 flow. Second operand has 42 states, 42 states have (on average 81.0952380952381) internal successors, (3406), 42 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:16,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:16,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:20:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:18,231 INFO L130 PetriNetUnfolder]: 3440/6191 cut-off events. [2023-08-30 15:20:18,231 INFO L131 PetriNetUnfolder]: For 45294/45686 co-relation queries the response was YES. [2023-08-30 15:20:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41839 conditions, 6191 events. 3440/6191 cut-off events. For 45294/45686 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 42167 event pairs, 2765 based on Foata normal form. 391/6581 useless extension candidates. Maximal degree in co-relation 41787. Up to 3429 conditions per place. [2023-08-30 15:20:18,273 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 108 selfloop transitions, 30 changer transitions 4/143 dead transitions. [2023-08-30 15:20:18,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 143 transitions, 1883 flow [2023-08-30 15:20:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 15:20:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 15:20:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1595 transitions. [2023-08-30 15:20:18,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398678883443426 [2023-08-30 15:20:18,275 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1595 transitions. [2023-08-30 15:20:18,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1595 transitions. [2023-08-30 15:20:18,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:18,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1595 transitions. [2023-08-30 15:20:18,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.94736842105263) internal successors, (1595), 19 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states 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 15:20:18,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states 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 15:20:18,279 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 247.0) internal successors, (4940), 20 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states 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 15:20:18,279 INFO L175 Difference]: Start difference. First operand has 197 places, 86 transitions, 1015 flow. Second operand 19 states and 1595 transitions. [2023-08-30 15:20:18,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 143 transitions, 1883 flow [2023-08-30 15:20:18,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 143 transitions, 1810 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-08-30 15:20:18,330 INFO L231 Difference]: Finished difference. Result has 208 places, 96 transitions, 1168 flow [2023-08-30 15:20:18,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1168, PETRI_PLACES=208, PETRI_TRANSITIONS=96} [2023-08-30 15:20:18,330 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 171 predicate places. [2023-08-30 15:20:18,330 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 96 transitions, 1168 flow [2023-08-30 15:20:18,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 81.0952380952381) internal successors, (3406), 42 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:18,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:18,331 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-30 15:20:18,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-30 15:20:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:18,531 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:18,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1620656490, now seen corresponding path program 6 times [2023-08-30 15:20:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:18,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932787668] [2023-08-30 15:20:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:18,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932787668] [2023-08-30 15:20:18,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932787668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435661802] [2023-08-30 15:20:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:18,881 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:18,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 15:20:19,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 15:20:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:20:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:19,243 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 15:20:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:19,281 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 20 treesize of output 22 [2023-08-30 15:20:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:19,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:19,824 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 28 treesize of output 29 [2023-08-30 15:20:19,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:19,831 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 47 treesize of output 39 [2023-08-30 15:20:19,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 9 [2023-08-30 15:20:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435661802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:20,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-30 15:20:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50300713] [2023-08-30 15:20:20,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 15:20:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 15:20:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 15:20:25,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:20:26,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 247 [2023-08-30 15:20:26,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 96 transitions, 1168 flow. Second operand has 44 states, 44 states have (on average 85.0909090909091) internal successors, (3744), 44 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 15:20:26,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:26,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 247 [2023-08-30 15:20:26,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:27,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:20:33,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:20:38,107 INFO L130 PetriNetUnfolder]: 7074/12849 cut-off events. [2023-08-30 15:20:38,107 INFO L131 PetriNetUnfolder]: For 93347/94135 co-relation queries the response was YES. [2023-08-30 15:20:38,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85828 conditions, 12849 events. 7074/12849 cut-off events. For 93347/94135 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 103881 event pairs, 3015 based on Foata normal form. 846/13688 useless extension candidates. Maximal degree in co-relation 85770. Up to 2860 conditions per place. [2023-08-30 15:20:38,186 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 319 selfloop transitions, 157 changer transitions 32/509 dead transitions. [2023-08-30 15:20:38,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 509 transitions, 6420 flow [2023-08-30 15:20:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-30 15:20:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-30 15:20:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6861 transitions. [2023-08-30 15:20:38,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561195889131112 [2023-08-30 15:20:38,191 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6861 transitions. [2023-08-30 15:20:38,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6861 transitions. [2023-08-30 15:20:38,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:38,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6861 transitions. [2023-08-30 15:20:38,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 87.96153846153847) internal successors, (6861), 78 states have internal predecessors, (6861), 0 states have call successors, (0), 0 states 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 15:20:38,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 247.0) internal successors, (19513), 79 states have internal predecessors, (19513), 0 states have call successors, (0), 0 states 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 15:20:38,205 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 247.0) internal successors, (19513), 79 states have internal predecessors, (19513), 0 states have call successors, (0), 0 states 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 15:20:38,205 INFO L175 Difference]: Start difference. First operand has 208 places, 96 transitions, 1168 flow. Second operand 78 states and 6861 transitions. [2023-08-30 15:20:38,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 509 transitions, 6420 flow [2023-08-30 15:20:38,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 509 transitions, 6241 flow, removed 37 selfloop flow, removed 10 redundant places. [2023-08-30 15:20:38,343 INFO L231 Difference]: Finished difference. Result has 288 places, 208 transitions, 2839 flow [2023-08-30 15:20:38,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2839, PETRI_PLACES=288, PETRI_TRANSITIONS=208} [2023-08-30 15:20:38,344 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 251 predicate places. [2023-08-30 15:20:38,344 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 208 transitions, 2839 flow [2023-08-30 15:20:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.0909090909091) internal successors, (3744), 44 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 15:20:38,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:38,344 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:38,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-30 15:20:38,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 15:20:38,545 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:38,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1403941466, now seen corresponding path program 5 times [2023-08-30 15:20:38,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:38,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682328304] [2023-08-30 15:20:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:39,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682328304] [2023-08-30 15:20:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682328304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831941586] [2023-08-30 15:20:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:20:39,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:39,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:39,035 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:39,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 15:20:39,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 15:20:39,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 15:20:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:39,398 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 13 treesize of output 9 [2023-08-30 15:20:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:39,430 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 18 treesize of output 20 [2023-08-30 15:20:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:39,459 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 18 treesize of output 20 [2023-08-30 15:20:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:39,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:39,846 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1983 (Array Int Int)) (v_ArrVal_1982 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1982) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1983) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:20:39,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:39,852 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 29 treesize of output 30 [2023-08-30 15:20:39,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:39,857 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 81 treesize of output 75 [2023-08-30 15:20:39,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:20:39,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:20:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-30 15:20:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831941586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:40,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:40,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 15:20:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482053684] [2023-08-30 15:20:40,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 15:20:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 15:20:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1922, Unknown=10, NotChecked=88, Total=2162 [2023-08-30 15:20:40,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:20:40,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 208 transitions, 2839 flow. Second operand has 47 states, 47 states have (on average 78.08510638297872) internal successors, (3670), 47 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states 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 15:20:40,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:40,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:20:40,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:43,189 INFO L130 PetriNetUnfolder]: 6910/12578 cut-off events. [2023-08-30 15:20:43,189 INFO L131 PetriNetUnfolder]: For 111107/111834 co-relation queries the response was YES. [2023-08-30 15:20:43,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87196 conditions, 12578 events. 6910/12578 cut-off events. For 111107/111834 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 99336 event pairs, 3751 based on Foata normal form. 833/13390 useless extension candidates. Maximal degree in co-relation 87126. Up to 4285 conditions per place. [2023-08-30 15:20:43,293 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 331 selfloop transitions, 55 changer transitions 4/391 dead transitions. [2023-08-30 15:20:43,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 391 transitions, 5535 flow [2023-08-30 15:20:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:20:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:20:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1516 transitions. [2023-08-30 15:20:43,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34098065677013045 [2023-08-30 15:20:43,295 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1516 transitions. [2023-08-30 15:20:43,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1516 transitions. [2023-08-30 15:20:43,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:43,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1516 transitions. [2023-08-30 15:20:43,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.22222222222223) internal successors, (1516), 18 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 15:20:43,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:20:43,299 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:20:43,299 INFO L175 Difference]: Start difference. First operand has 288 places, 208 transitions, 2839 flow. Second operand 18 states and 1516 transitions. [2023-08-30 15:20:43,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 391 transitions, 5535 flow [2023-08-30 15:20:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 391 transitions, 5161 flow, removed 58 selfloop flow, removed 28 redundant places. [2023-08-30 15:20:43,495 INFO L231 Difference]: Finished difference. Result has 279 places, 210 transitions, 2660 flow [2023-08-30 15:20:43,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2660, PETRI_PLACES=279, PETRI_TRANSITIONS=210} [2023-08-30 15:20:43,496 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 242 predicate places. [2023-08-30 15:20:43,496 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 210 transitions, 2660 flow [2023-08-30 15:20:43,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 78.08510638297872) internal successors, (3670), 47 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states 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 15:20:43,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:43,497 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:43,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 15:20:43,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:43,702 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:43,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2075850391, now seen corresponding path program 8 times [2023-08-30 15:20:43,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:43,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765912546] [2023-08-30 15:20:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:43,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765912546] [2023-08-30 15:20:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765912546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425934778] [2023-08-30 15:20:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:20:43,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:43,856 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:43,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 15:20:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:20:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:20:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:44,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425934778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:44,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:44,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-30 15:20:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380438964] [2023-08-30 15:20:44,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:20:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:20:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:20:44,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:20:44,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 210 transitions, 2660 flow. Second operand has 34 states, 34 states have (on average 95.17647058823529) internal successors, (3236), 34 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 15:20:44,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:44,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:20:44,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:46,299 INFO L130 PetriNetUnfolder]: 5724/10501 cut-off events. [2023-08-30 15:20:46,299 INFO L131 PetriNetUnfolder]: For 101345/101667 co-relation queries the response was YES. [2023-08-30 15:20:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73732 conditions, 10501 events. 5724/10501 cut-off events. For 101345/101667 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 80092 event pairs, 2489 based on Foata normal form. 538/11037 useless extension candidates. Maximal degree in co-relation 73668. Up to 5770 conditions per place. [2023-08-30 15:20:46,369 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 172 selfloop transitions, 11 changer transitions 329/516 dead transitions. [2023-08-30 15:20:46,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 516 transitions, 7551 flow [2023-08-30 15:20:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:20:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:20:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2087 transitions. [2023-08-30 15:20:46,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023520339309813 [2023-08-30 15:20:46,371 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2087 transitions. [2023-08-30 15:20:46,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2087 transitions. [2023-08-30 15:20:46,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:20:46,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2087 transitions. [2023-08-30 15:20:46,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.38095238095238) internal successors, (2087), 21 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states 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 15:20:46,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:20:46,375 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:20:46,375 INFO L175 Difference]: Start difference. First operand has 279 places, 210 transitions, 2660 flow. Second operand 21 states and 2087 transitions. [2023-08-30 15:20:46,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 516 transitions, 7551 flow [2023-08-30 15:20:46,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 516 transitions, 7252 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-08-30 15:20:46,495 INFO L231 Difference]: Finished difference. Result has 293 places, 163 transitions, 2051 flow [2023-08-30 15:20:46,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2051, PETRI_PLACES=293, PETRI_TRANSITIONS=163} [2023-08-30 15:20:46,495 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 256 predicate places. [2023-08-30 15:20:46,495 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 163 transitions, 2051 flow [2023-08-30 15:20:46,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 95.17647058823529) internal successors, (3236), 34 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 15:20:46,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:46,496 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:46,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-30 15:20:46,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:46,704 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:20:46,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1403941467, now seen corresponding path program 6 times [2023-08-30 15:20:46,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:46,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212111126] [2023-08-30 15:20:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:47,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212111126] [2023-08-30 15:20:47,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212111126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767409332] [2023-08-30 15:20:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:20:47,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:47,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:47,123 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 15:20:47,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 15:20:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:20:47,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:47,536 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 15:20:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:47,582 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 18 treesize of output 20 [2023-08-30 15:20:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:20:47,623 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 18 treesize of output 20 [2023-08-30 15:20:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:48,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:48,207 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 29 treesize of output 30 [2023-08-30 15:20:48,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:20:48,213 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 157 treesize of output 141 [2023-08-30 15:20:48,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 21 [2023-08-30 15:20:48,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 20 [2023-08-30 15:20:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767409332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:48,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:48,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 15:20:48,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568897954] [2023-08-30 15:20:48,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 15:20:48,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 15:20:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1939, Unknown=4, NotChecked=0, Total=2162 [2023-08-30 15:20:53,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:20:53,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 163 transitions, 2051 flow. Second operand has 47 states, 47 states have (on average 69.08510638297872) internal successors, (3247), 47 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states 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 15:20:53,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:53,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:20:53,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:20:55,088 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 15:21:15,004 INFO L130 PetriNetUnfolder]: 7925/14595 cut-off events. [2023-08-30 15:21:15,004 INFO L131 PetriNetUnfolder]: For 156636/157639 co-relation queries the response was YES. [2023-08-30 15:21:15,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102682 conditions, 14595 events. 7925/14595 cut-off events. For 156636/157639 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 122879 event pairs, 1975 based on Foata normal form. 1670/16265 useless extension candidates. Maximal degree in co-relation 102620. Up to 2509 conditions per place. [2023-08-30 15:21:15,120 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 749 selfloop transitions, 106 changer transitions 64/920 dead transitions. [2023-08-30 15:21:15,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 920 transitions, 12492 flow [2023-08-30 15:21:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 15:21:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 15:21:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3899 transitions. [2023-08-30 15:21:15,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30951813923950144 [2023-08-30 15:21:15,123 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3899 transitions. [2023-08-30 15:21:15,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3899 transitions. [2023-08-30 15:21:15,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:15,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3899 transitions. [2023-08-30 15:21:15,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 76.45098039215686) internal successors, (3899), 51 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 15:21:15,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 247.0) internal successors, (12844), 52 states have internal predecessors, (12844), 0 states have call successors, (0), 0 states 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 15:21:15,132 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 247.0) internal successors, (12844), 52 states have internal predecessors, (12844), 0 states have call successors, (0), 0 states 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 15:21:15,132 INFO L175 Difference]: Start difference. First operand has 293 places, 163 transitions, 2051 flow. Second operand 51 states and 3899 transitions. [2023-08-30 15:21:15,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 920 transitions, 12492 flow [2023-08-30 15:21:16,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 920 transitions, 10901 flow, removed 622 selfloop flow, removed 30 redundant places. [2023-08-30 15:21:16,305 INFO L231 Difference]: Finished difference. Result has 284 places, 189 transitions, 2399 flow [2023-08-30 15:21:16,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2399, PETRI_PLACES=284, PETRI_TRANSITIONS=189} [2023-08-30 15:21:16,305 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 247 predicate places. [2023-08-30 15:21:16,305 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 189 transitions, 2399 flow [2023-08-30 15:21:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.08510638297872) internal successors, (3247), 47 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states 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 15:21:16,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:16,306 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:16,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-30 15:21:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 15:21:16,506 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:16,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash 572514829, now seen corresponding path program 6 times [2023-08-30 15:21:16,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:16,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699084469] [2023-08-30 15:21:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699084469] [2023-08-30 15:21:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699084469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270839376] [2023-08-30 15:21:16,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:21:16,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:16,720 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:16,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 15:21:17,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 15:21:17,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:21:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270839376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:17,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:17,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 15:21:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109236002] [2023-08-30 15:21:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:21:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:21:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 15:21:17,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:21:17,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 189 transitions, 2399 flow. Second operand has 39 states, 39 states have (on average 95.12820512820512) internal successors, (3710), 39 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 15:21:17,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:17,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:21:17,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:19,880 INFO L130 PetriNetUnfolder]: 7607/14171 cut-off events. [2023-08-30 15:21:19,881 INFO L131 PetriNetUnfolder]: For 130960/131878 co-relation queries the response was YES. [2023-08-30 15:21:19,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96924 conditions, 14171 events. 7607/14171 cut-off events. For 130960/131878 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 120296 event pairs, 3125 based on Foata normal form. 1184/15353 useless extension candidates. Maximal degree in co-relation 96868. Up to 5726 conditions per place. [2023-08-30 15:21:19,977 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 328 selfloop transitions, 74 changer transitions 60/463 dead transitions. [2023-08-30 15:21:19,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 463 transitions, 5773 flow [2023-08-30 15:21:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:21:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:21:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2421 transitions. [2023-08-30 15:21:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084008097165992 [2023-08-30 15:21:19,979 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2421 transitions. [2023-08-30 15:21:19,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2421 transitions. [2023-08-30 15:21:19,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:19,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2421 transitions. [2023-08-30 15:21:19,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states 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 15:21:19,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:21:19,983 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:21:19,984 INFO L175 Difference]: Start difference. First operand has 284 places, 189 transitions, 2399 flow. Second operand 24 states and 2421 transitions. [2023-08-30 15:21:19,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 463 transitions, 5773 flow [2023-08-30 15:21:20,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 463 transitions, 5531 flow, removed 35 selfloop flow, removed 19 redundant places. [2023-08-30 15:21:20,287 INFO L231 Difference]: Finished difference. Result has 290 places, 188 transitions, 2292 flow [2023-08-30 15:21:20,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2292, PETRI_PLACES=290, PETRI_TRANSITIONS=188} [2023-08-30 15:21:20,287 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 253 predicate places. [2023-08-30 15:21:20,287 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 188 transitions, 2292 flow [2023-08-30 15:21:20,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 95.12820512820512) internal successors, (3710), 39 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 15:21:20,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:20,288 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2023-08-30 15:21:20,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 15:21:20,488 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:20,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1072284316, now seen corresponding path program 1 times [2023-08-30 15:21:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:20,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900531763] [2023-08-30 15:21:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:21:20,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900531763] [2023-08-30 15:21:20,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900531763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512026425] [2023-08-30 15:21:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:20,572 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:20,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 15:21:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:21:20,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:21:20,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 15:21:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512026425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:20,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 15:21:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884872020] [2023-08-30 15:21:20,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:20,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:21:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:21:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:21:20,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:21:20,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 188 transitions, 2292 flow. Second operand has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states 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 15:21:20,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:20,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:21:20,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:25,123 INFO L130 PetriNetUnfolder]: 14839/28048 cut-off events. [2023-08-30 15:21:25,123 INFO L131 PetriNetUnfolder]: For 282571/284495 co-relation queries the response was YES. [2023-08-30 15:21:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202097 conditions, 28048 events. 14839/28048 cut-off events. For 282571/284495 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 252855 event pairs, 4552 based on Foata normal form. 2788/30816 useless extension candidates. Maximal degree in co-relation 202041. Up to 4873 conditions per place. [2023-08-30 15:21:25,358 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 529 selfloop transitions, 58 changer transitions 0/588 dead transitions. [2023-08-30 15:21:25,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 588 transitions, 8380 flow [2023-08-30 15:21:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:21:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:21:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1876 transitions. [2023-08-30 15:21:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47469635627530365 [2023-08-30 15:21:25,362 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1876 transitions. [2023-08-30 15:21:25,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1876 transitions. [2023-08-30 15:21:25,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:25,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1876 transitions. [2023-08-30 15:21:25,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.25) internal successors, (1876), 16 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 15:21:25,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:21:25,365 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 247.0) internal successors, (4199), 17 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states 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 15:21:25,365 INFO L175 Difference]: Start difference. First operand has 290 places, 188 transitions, 2292 flow. Second operand 16 states and 1876 transitions. [2023-08-30 15:21:25,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 588 transitions, 8380 flow [2023-08-30 15:21:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 588 transitions, 8305 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-08-30 15:21:26,865 INFO L231 Difference]: Finished difference. Result has 299 places, 196 transitions, 2581 flow [2023-08-30 15:21:26,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2581, PETRI_PLACES=299, PETRI_TRANSITIONS=196} [2023-08-30 15:21:26,866 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 262 predicate places. [2023-08-30 15:21:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 196 transitions, 2581 flow [2023-08-30 15:21:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.29411764705883) internal successors, (1790), 17 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states 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 15:21:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:26,866 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:26,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:27,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 15:21:27,067 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:27,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -295692670, now seen corresponding path program 9 times [2023-08-30 15:21:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021720475] [2023-08-30 15:21:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021720475] [2023-08-30 15:21:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021720475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337873361] [2023-08-30 15:21:27,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:21:27,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:27,474 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:27,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 15:21:27,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 15:21:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:21:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:27,894 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 15:21:27,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:27,929 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 15:21:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:27,960 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 15:21:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:28,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:28,275 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2237 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2237) c_~A~0.base) (+ c_~A~0.offset 20)) 9223372039002259456)) is different from false [2023-08-30 15:21:28,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:28,326 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 27 treesize of output 28 [2023-08-30 15:21:28,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:28,331 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 71 treesize of output 65 [2023-08-30 15:21:28,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 46 [2023-08-30 15:21:28,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-08-30 15:21:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337873361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:28,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-30 15:21:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977031255] [2023-08-30 15:21:28,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 15:21:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 15:21:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1747, Unknown=7, NotChecked=84, Total=1980 [2023-08-30 15:21:28,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:21:28,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 196 transitions, 2581 flow. Second operand has 45 states, 45 states have (on average 78.15555555555555) internal successors, (3517), 45 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states 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 15:21:28,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:28,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:21:28,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:33,491 INFO L130 PetriNetUnfolder]: 14655/27749 cut-off events. [2023-08-30 15:21:33,491 INFO L131 PetriNetUnfolder]: For 273678/273829 co-relation queries the response was YES. [2023-08-30 15:21:33,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200999 conditions, 27749 events. 14655/27749 cut-off events. For 273678/273829 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 249272 event pairs, 4799 based on Foata normal form. 629/28374 useless extension candidates. Maximal degree in co-relation 200934. Up to 10646 conditions per place. [2023-08-30 15:21:33,729 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 693 selfloop transitions, 20 changer transitions 0/719 dead transitions. [2023-08-30 15:21:33,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 719 transitions, 12784 flow [2023-08-30 15:21:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:21:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:21:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1490 transitions. [2023-08-30 15:21:33,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351327035537562 [2023-08-30 15:21:33,731 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1490 transitions. [2023-08-30 15:21:33,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1490 transitions. [2023-08-30 15:21:33,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:33,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1490 transitions. [2023-08-30 15:21:33,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.77777777777777) internal successors, (1490), 18 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states 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 15:21:33,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:21:33,734 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states 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 15:21:33,734 INFO L175 Difference]: Start difference. First operand has 299 places, 196 transitions, 2581 flow. Second operand 18 states and 1490 transitions. [2023-08-30 15:21:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 719 transitions, 12784 flow [2023-08-30 15:21:34,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 719 transitions, 11736 flow, removed 300 selfloop flow, removed 8 redundant places. [2023-08-30 15:21:34,520 INFO L231 Difference]: Finished difference. Result has 310 places, 197 transitions, 2470 flow [2023-08-30 15:21:34,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2470, PETRI_PLACES=310, PETRI_TRANSITIONS=197} [2023-08-30 15:21:34,520 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 273 predicate places. [2023-08-30 15:21:34,520 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 197 transitions, 2470 flow [2023-08-30 15:21:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.15555555555555) internal successors, (3517), 45 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states 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 15:21:34,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:21:34,521 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:21:34,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 15:21:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 15:21:34,725 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:21:34,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:21:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -295692669, now seen corresponding path program 6 times [2023-08-30 15:21:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:21:34,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477231825] [2023-08-30 15:21:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:21:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:21:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:21:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:35,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:21:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477231825] [2023-08-30 15:21:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477231825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:21:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655643447] [2023-08-30 15:21:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:21:35,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:21:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:21:35,233 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:21:35,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 15:21:35,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 15:21:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:21:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:21:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:21:35,766 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 15:21:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:35,812 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 20 treesize of output 22 [2023-08-30 15:21:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:21:35,854 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 20 treesize of output 22 [2023-08-30 15:21:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:36,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:21:36,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:36,456 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 31 treesize of output 32 [2023-08-30 15:21:36,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:21:36,461 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 89 treesize of output 81 [2023-08-30 15:21:36,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 30 [2023-08-30 15:21:36,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 50 [2023-08-30 15:21:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:21:36,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655643447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:21:36,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:21:36,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-30 15:21:36,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707287102] [2023-08-30 15:21:36,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:21:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-30 15:21:36,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:21:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-30 15:21:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1941, Unknown=2, NotChecked=0, Total=2162 [2023-08-30 15:21:40,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:21:40,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 197 transitions, 2470 flow. Second operand has 47 states, 47 states have (on average 69.14893617021276) internal successors, (3250), 47 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states 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 15:21:40,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:21:40,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:21:40,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:14,514 INFO L130 PetriNetUnfolder]: 13382/25467 cut-off events. [2023-08-30 15:22:14,514 INFO L131 PetriNetUnfolder]: For 236861/236861 co-relation queries the response was YES. [2023-08-30 15:22:14,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186469 conditions, 25467 events. 13382/25467 cut-off events. For 236861/236861 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 224956 event pairs, 1630 based on Foata normal form. 1268/26735 useless extension candidates. Maximal degree in co-relation 186403. Up to 4927 conditions per place. [2023-08-30 15:22:14,720 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 990 selfloop transitions, 57 changer transitions 241/1294 dead transitions. [2023-08-30 15:22:14,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1294 transitions, 20525 flow [2023-08-30 15:22:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 15:22:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 15:22:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3814 transitions. [2023-08-30 15:22:14,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3027705009129158 [2023-08-30 15:22:14,723 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3814 transitions. [2023-08-30 15:22:14,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3814 transitions. [2023-08-30 15:22:14,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:14,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3814 transitions. [2023-08-30 15:22:14,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 74.7843137254902) internal successors, (3814), 51 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states 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 15:22:14,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 247.0) internal successors, (12844), 52 states have internal predecessors, (12844), 0 states have call successors, (0), 0 states 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 15:22:14,731 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 247.0) internal successors, (12844), 52 states have internal predecessors, (12844), 0 states have call successors, (0), 0 states 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 15:22:14,731 INFO L175 Difference]: Start difference. First operand has 310 places, 197 transitions, 2470 flow. Second operand 51 states and 3814 transitions. [2023-08-30 15:22:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1294 transitions, 20525 flow [2023-08-30 15:22:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1294 transitions, 20426 flow, removed 5 selfloop flow, removed 17 redundant places. [2023-08-30 15:22:15,426 INFO L231 Difference]: Finished difference. Result has 346 places, 232 transitions, 2902 flow [2023-08-30 15:22:15,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2902, PETRI_PLACES=346, PETRI_TRANSITIONS=232} [2023-08-30 15:22:15,426 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 309 predicate places. [2023-08-30 15:22:15,426 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 232 transitions, 2902 flow [2023-08-30 15:22:15,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.14893617021276) internal successors, (3250), 47 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states 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 15:22:15,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:15,427 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:15,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:15,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:15,627 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:15,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -576535719, now seen corresponding path program 10 times [2023-08-30 15:22:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668985546] [2023-08-30 15:22:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:15,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:15,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668985546] [2023-08-30 15:22:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668985546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:15,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451938397] [2023-08-30 15:22:15,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:22:15,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:15,795 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:15,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 15:22:16,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:22:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:22:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:16,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:16,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451938397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:16,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-30 15:22:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204445216] [2023-08-30 15:22:16,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 15:22:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 15:22:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 15:22:16,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:22:16,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 232 transitions, 2902 flow. Second operand has 39 states, 39 states have (on average 95.15384615384616) internal successors, (3711), 39 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states 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 15:22:16,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:16,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:22:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:20,815 INFO L130 PetriNetUnfolder]: 12547/24030 cut-off events. [2023-08-30 15:22:20,815 INFO L131 PetriNetUnfolder]: For 228261/228261 co-relation queries the response was YES. [2023-08-30 15:22:20,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182950 conditions, 24030 events. 12547/24030 cut-off events. For 228261/228261 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 210650 event pairs, 6489 based on Foata normal form. 172/24202 useless extension candidates. Maximal degree in co-relation 182883. Up to 13562 conditions per place. [2023-08-30 15:22:21,025 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 164 selfloop transitions, 22 changer transitions 454/644 dead transitions. [2023-08-30 15:22:21,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 644 transitions, 9528 flow [2023-08-30 15:22:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:22:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:22:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2381 transitions. [2023-08-30 15:22:21,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016531713900135 [2023-08-30 15:22:21,027 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2381 transitions. [2023-08-30 15:22:21,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2381 transitions. [2023-08-30 15:22:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:21,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2381 transitions. [2023-08-30 15:22:21,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 99.20833333333333) internal successors, (2381), 24 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states 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 15:22:21,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:22:21,031 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:22:21,031 INFO L175 Difference]: Start difference. First operand has 346 places, 232 transitions, 2902 flow. Second operand 24 states and 2381 transitions. [2023-08-30 15:22:21,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 644 transitions, 9528 flow [2023-08-30 15:22:22,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 644 transitions, 9404 flow, removed 22 selfloop flow, removed 17 redundant places. [2023-08-30 15:22:22,076 INFO L231 Difference]: Finished difference. Result has 353 places, 161 transitions, 1983 flow [2023-08-30 15:22:22,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1983, PETRI_PLACES=353, PETRI_TRANSITIONS=161} [2023-08-30 15:22:22,076 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 316 predicate places. [2023-08-30 15:22:22,076 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 161 transitions, 1983 flow [2023-08-30 15:22:22,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 95.15384615384616) internal successors, (3711), 39 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states 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 15:22:22,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:22,077 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:22,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-08-30 15:22:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:22,277 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:22,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1681465452, now seen corresponding path program 7 times [2023-08-30 15:22:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135184828] [2023-08-30 15:22:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:23,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135184828] [2023-08-30 15:22:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135184828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832980742] [2023-08-30 15:22:23,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:22:23,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:23,019 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:23,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 15:22:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 15:22:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:23,482 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 13 treesize of output 9 [2023-08-30 15:22:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:23,522 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 18 treesize of output 20 [2023-08-30 15:22:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:23,589 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 18 treesize of output 20 [2023-08-30 15:22:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:23,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:24,078 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2399 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2399) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456))) is different from false [2023-08-30 15:22:24,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:24,148 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 29 treesize of output 30 [2023-08-30 15:22:24,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:24,153 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 81 treesize of output 75 [2023-08-30 15:22:24,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:22:24,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:22:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832980742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:24,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:24,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-30 15:22:24,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112063816] [2023-08-30 15:22:24,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:24,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 15:22:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 15:22:24,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2492, Unknown=29, NotChecked=100, Total=2756 [2023-08-30 15:22:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 247 [2023-08-30 15:22:24,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 161 transitions, 1983 flow. Second operand has 53 states, 53 states have (on average 74.0754716981132) internal successors, (3926), 53 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states 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 15:22:24,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:24,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 247 [2023-08-30 15:22:24,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:29,931 INFO L130 PetriNetUnfolder]: 10469/20122 cut-off events. [2023-08-30 15:22:29,931 INFO L131 PetriNetUnfolder]: For 217225/218657 co-relation queries the response was YES. [2023-08-30 15:22:30,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152986 conditions, 20122 events. 10469/20122 cut-off events. For 217225/218657 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 176247 event pairs, 6783 based on Foata normal form. 1529/21613 useless extension candidates. Maximal degree in co-relation 152919. Up to 10823 conditions per place. [2023-08-30 15:22:30,092 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 445 selfloop transitions, 47 changer transitions 0/494 dead transitions. [2023-08-30 15:22:30,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 494 transitions, 6888 flow [2023-08-30 15:22:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:22:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:22:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1589 transitions. [2023-08-30 15:22:30,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32165991902834007 [2023-08-30 15:22:30,094 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1589 transitions. [2023-08-30 15:22:30,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1589 transitions. [2023-08-30 15:22:30,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:30,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1589 transitions. [2023-08-30 15:22:30,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.45) internal successors, (1589), 20 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 15:22:30,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:22:30,097 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:22:30,097 INFO L175 Difference]: Start difference. First operand has 353 places, 161 transitions, 1983 flow. Second operand 20 states and 1589 transitions. [2023-08-30 15:22:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 494 transitions, 6888 flow [2023-08-30 15:22:31,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 494 transitions, 6397 flow, removed 146 selfloop flow, removed 26 redundant places. [2023-08-30 15:22:31,669 INFO L231 Difference]: Finished difference. Result has 283 places, 163 transitions, 2027 flow [2023-08-30 15:22:31,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2027, PETRI_PLACES=283, PETRI_TRANSITIONS=163} [2023-08-30 15:22:31,669 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 246 predicate places. [2023-08-30 15:22:31,669 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 163 transitions, 2027 flow [2023-08-30 15:22:31,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 74.0754716981132) internal successors, (3926), 53 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states 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 15:22:31,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:31,670 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1] [2023-08-30 15:22:31,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:31,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:31,870 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:31,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1575675214, now seen corresponding path program 7 times [2023-08-30 15:22:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:31,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133904985] [2023-08-30 15:22:31,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:31,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:32,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133904985] [2023-08-30 15:22:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133904985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901156610] [2023-08-30 15:22:32,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:22:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:32,476 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:32,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 15:22:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 15:22:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:32,902 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 15:22:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:32,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 15:22:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:32,960 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 15:22:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:33,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:33,286 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2458 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2458) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:22:33,356 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:22:33,356 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 31 treesize of output 37 [2023-08-30 15:22:33,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:33,362 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 37 treesize of output 31 [2023-08-30 15:22:33,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-08-30 15:22:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-30 15:22:33,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901156610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:33,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:33,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 15:22:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918971574] [2023-08-30 15:22:33,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 15:22:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 15:22:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2277, Unknown=16, NotChecked=96, Total=2550 [2023-08-30 15:22:33,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:22:33,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 163 transitions, 2027 flow. Second operand has 51 states, 51 states have (on average 81.07843137254902) internal successors, (4135), 51 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states 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 15:22:33,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:33,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:22:33,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:37,268 INFO L130 PetriNetUnfolder]: 10443/20049 cut-off events. [2023-08-30 15:22:37,269 INFO L131 PetriNetUnfolder]: For 133473/134726 co-relation queries the response was YES. [2023-08-30 15:22:37,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150788 conditions, 20049 events. 10443/20049 cut-off events. For 133473/134726 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 174333 event pairs, 8127 based on Foata normal form. 1251/21213 useless extension candidates. Maximal degree in co-relation 150737. Up to 17749 conditions per place. [2023-08-30 15:22:37,433 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 145 selfloop transitions, 65 changer transitions 0/212 dead transitions. [2023-08-30 15:22:37,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 212 transitions, 3018 flow [2023-08-30 15:22:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:22:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:22:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1744 transitions. [2023-08-30 15:22:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33622517833044147 [2023-08-30 15:22:37,435 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1744 transitions. [2023-08-30 15:22:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1744 transitions. [2023-08-30 15:22:37,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:37,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1744 transitions. [2023-08-30 15:22:37,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.04761904761905) internal successors, (1744), 21 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 15:22:37,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:22:37,439 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 247.0) internal successors, (5434), 22 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states 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 15:22:37,439 INFO L175 Difference]: Start difference. First operand has 283 places, 163 transitions, 2027 flow. Second operand 21 states and 1744 transitions. [2023-08-30 15:22:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 212 transitions, 3018 flow [2023-08-30 15:22:37,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 212 transitions, 2924 flow, removed 6 selfloop flow, removed 17 redundant places. [2023-08-30 15:22:37,706 INFO L231 Difference]: Finished difference. Result has 287 places, 166 transitions, 2091 flow [2023-08-30 15:22:37,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2091, PETRI_PLACES=287, PETRI_TRANSITIONS=166} [2023-08-30 15:22:37,706 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 250 predicate places. [2023-08-30 15:22:37,706 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 166 transitions, 2091 flow [2023-08-30 15:22:37,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 81.07843137254902) internal successors, (4135), 51 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states 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 15:22:37,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:37,707 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:37,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:37,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:37,913 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:37,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2142845413, now seen corresponding path program 8 times [2023-08-30 15:22:37,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:37,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044340395] [2023-08-30 15:22:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:37,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:38,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:38,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044340395] [2023-08-30 15:22:38,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044340395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:38,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626363836] [2023-08-30 15:22:38,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:38,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:38,150 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:38,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 15:22:38,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:22:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:38,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:22:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:38,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626363836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-30 15:22:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003402537] [2023-08-30 15:22:38,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 15:22:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 15:22:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 15:22:39,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:22:39,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 166 transitions, 2091 flow. Second operand has 44 states, 44 states have (on average 95.11363636363636) internal successors, (4185), 44 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states 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 15:22:39,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:39,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:22:39,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:41,871 INFO L130 PetriNetUnfolder]: 7967/15460 cut-off events. [2023-08-30 15:22:41,871 INFO L131 PetriNetUnfolder]: For 89563/90856 co-relation queries the response was YES. [2023-08-30 15:22:41,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113597 conditions, 15460 events. 7967/15460 cut-off events. For 89563/90856 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 132100 event pairs, 4360 based on Foata normal form. 1454/16912 useless extension candidates. Maximal degree in co-relation 113546. Up to 6064 conditions per place. [2023-08-30 15:22:41,980 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 320 selfloop transitions, 55 changer transitions 119/496 dead transitions. [2023-08-30 15:22:41,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 496 transitions, 6041 flow [2023-08-30 15:22:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:22:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:22:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2721 transitions. [2023-08-30 15:22:41,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080071974808817 [2023-08-30 15:22:41,982 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2721 transitions. [2023-08-30 15:22:41,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2721 transitions. [2023-08-30 15:22:41,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:41,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2721 transitions. [2023-08-30 15:22:41,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 100.77777777777777) internal successors, (2721), 27 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states 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 15:22:41,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states 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 15:22:41,986 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states 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 15:22:41,986 INFO L175 Difference]: Start difference. First operand has 287 places, 166 transitions, 2091 flow. Second operand 27 states and 2721 transitions. [2023-08-30 15:22:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 496 transitions, 6041 flow [2023-08-30 15:22:42,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 496 transitions, 5784 flow, removed 12 selfloop flow, removed 25 redundant places. [2023-08-30 15:22:42,166 INFO L231 Difference]: Finished difference. Result has 290 places, 158 transitions, 1812 flow [2023-08-30 15:22:42,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1812, PETRI_PLACES=290, PETRI_TRANSITIONS=158} [2023-08-30 15:22:42,167 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 253 predicate places. [2023-08-30 15:22:42,167 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 158 transitions, 1812 flow [2023-08-30 15:22:42,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 95.11363636363636) internal successors, (4185), 44 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states 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 15:22:42,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:42,167 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1] [2023-08-30 15:22:42,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-30 15:22:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:42,374 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:42,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1643876526, now seen corresponding path program 7 times [2023-08-30 15:22:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626763448] [2023-08-30 15:22:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626763448] [2023-08-30 15:22:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626763448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382322582] [2023-08-30 15:22:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:22:42,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:42,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:42,917 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:42,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 15:22:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 15:22:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:43,475 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 15:22:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:43,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 15:22:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:43,545 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 15:22:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:43,579 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 15:22:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:43,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:43,919 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2576 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2576) c_~A~0.base) (+ c_~A~0.offset 24)) 4294967296)) is different from false [2023-08-30 15:22:44,038 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:22:44,038 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 34 treesize of output 40 [2023-08-30 15:22:44,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:44,043 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 71 treesize of output 65 [2023-08-30 15:22:44,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:22:44,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 42 [2023-08-30 15:22:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382322582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:44,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 15:22:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735676282] [2023-08-30 15:22:44,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:44,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 15:22:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 15:22:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2570, Unknown=13, NotChecked=102, Total=2862 [2023-08-30 15:22:44,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:22:44,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 158 transitions, 1812 flow. Second operand has 54 states, 54 states have (on average 78.0925925925926) internal successors, (4217), 54 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states 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 15:22:44,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:44,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:22:44,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:47,598 INFO L130 PetriNetUnfolder]: 7090/13797 cut-off events. [2023-08-30 15:22:47,598 INFO L131 PetriNetUnfolder]: For 68642/69584 co-relation queries the response was YES. [2023-08-30 15:22:47,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99494 conditions, 13797 events. 7090/13797 cut-off events. For 68642/69584 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 115201 event pairs, 4319 based on Foata normal form. 991/14746 useless extension candidates. Maximal degree in co-relation 99444. Up to 6344 conditions per place. [2023-08-30 15:22:47,697 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 361 selfloop transitions, 48 changer transitions 0/411 dead transitions. [2023-08-30 15:22:47,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 411 transitions, 5027 flow [2023-08-30 15:22:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:22:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:22:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1668 transitions. [2023-08-30 15:22:47,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33765182186234816 [2023-08-30 15:22:47,698 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1668 transitions. [2023-08-30 15:22:47,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1668 transitions. [2023-08-30 15:22:47,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:47,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1668 transitions. [2023-08-30 15:22:47,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.4) internal successors, (1668), 20 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states 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 15:22:47,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:22:47,702 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:22:47,702 INFO L175 Difference]: Start difference. First operand has 290 places, 158 transitions, 1812 flow. Second operand 20 states and 1668 transitions. [2023-08-30 15:22:47,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 411 transitions, 5027 flow [2023-08-30 15:22:47,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 411 transitions, 4907 flow, removed 9 selfloop flow, removed 18 redundant places. [2023-08-30 15:22:47,974 INFO L231 Difference]: Finished difference. Result has 287 places, 157 transitions, 1767 flow [2023-08-30 15:22:47,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1767, PETRI_PLACES=287, PETRI_TRANSITIONS=157} [2023-08-30 15:22:47,975 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 250 predicate places. [2023-08-30 15:22:47,975 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 157 transitions, 1767 flow [2023-08-30 15:22:47,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 78.0925925925926) internal successors, (4217), 54 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states 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 15:22:47,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:47,975 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2023-08-30 15:22:47,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 15:22:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 15:22:48,176 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:48,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1601289066, now seen corresponding path program 7 times [2023-08-30 15:22:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984042459] [2023-08-30 15:22:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:48,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984042459] [2023-08-30 15:22:48,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984042459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378113486] [2023-08-30 15:22:48,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:22:48,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:48,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:48,777 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:48,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 15:22:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 15:22:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:49,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 15:22:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:49,274 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 15:22:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:49,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:49,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:49,738 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 26 treesize of output 27 [2023-08-30 15:22:49,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:49,744 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 43 treesize of output 37 [2023-08-30 15:22:49,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:22:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378113486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:49,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:49,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 15:22:49,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309803783] [2023-08-30 15:22:49,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:49,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 15:22:49,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 15:22:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2688, Unknown=3, NotChecked=0, Total=2862 [2023-08-30 15:22:52,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 15:22:52,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 157 transitions, 1767 flow. Second operand has 54 states, 54 states have (on average 93.07407407407408) internal successors, (5026), 54 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states 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 15:22:52,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:22:52,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 15:22:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:22:55,659 INFO L130 PetriNetUnfolder]: 7064/13724 cut-off events. [2023-08-30 15:22:55,660 INFO L131 PetriNetUnfolder]: For 76959/77942 co-relation queries the response was YES. [2023-08-30 15:22:55,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99106 conditions, 13724 events. 7064/13724 cut-off events. For 76959/77942 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 112921 event pairs, 5528 based on Foata normal form. 980/14691 useless extension candidates. Maximal degree in co-relation 99057. Up to 10346 conditions per place. [2023-08-30 15:22:55,759 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 175 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2023-08-30 15:22:55,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 222 transitions, 2907 flow [2023-08-30 15:22:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:22:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:22:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2296 transitions. [2023-08-30 15:22:55,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873144399460189 [2023-08-30 15:22:55,761 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2296 transitions. [2023-08-30 15:22:55,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2296 transitions. [2023-08-30 15:22:55,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:22:55,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2296 transitions. [2023-08-30 15:22:55,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.66666666666667) internal successors, (2296), 24 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 15:22:55,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:22:55,765 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:22:55,765 INFO L175 Difference]: Start difference. First operand has 287 places, 157 transitions, 1767 flow. Second operand 24 states and 2296 transitions. [2023-08-30 15:22:55,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 222 transitions, 2907 flow [2023-08-30 15:22:55,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 222 transitions, 2815 flow, removed 3 selfloop flow, removed 17 redundant places. [2023-08-30 15:22:55,876 INFO L231 Difference]: Finished difference. Result has 296 places, 163 transitions, 1854 flow [2023-08-30 15:22:55,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1854, PETRI_PLACES=296, PETRI_TRANSITIONS=163} [2023-08-30 15:22:55,876 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 259 predicate places. [2023-08-30 15:22:55,876 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 163 transitions, 1854 flow [2023-08-30 15:22:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 93.07407407407408) internal successors, (5026), 54 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states 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 15:22:55,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:22:55,877 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2023-08-30 15:22:55,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-08-30 15:22:56,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 15:22:56,077 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:22:56,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:22:56,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1601289065, now seen corresponding path program 8 times [2023-08-30 15:22:56,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:22:56,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579692616] [2023-08-30 15:22:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:22:56,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:22:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:22:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:56,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:22:56,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579692616] [2023-08-30 15:22:56,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579692616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:22:56,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613999224] [2023-08-30 15:22:56,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:22:56,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:22:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:22:56,584 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:22:56,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 15:22:56,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:22:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:22:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 15:22:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:22:57,073 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 15:22:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:22:57,118 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 18 treesize of output 20 [2023-08-30 15:22:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:22:57,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:57,891 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 26 treesize of output 27 [2023-08-30 15:22:57,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:22:57,897 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 41 treesize of output 33 [2023-08-30 15:22:57,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2023-08-30 15:22:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:22:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613999224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:22:58,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:22:58,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2023-08-30 15:22:58,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784102367] [2023-08-30 15:22:58,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:22:58,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-08-30 15:22:58,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:22:58,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-08-30 15:22:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2759, Unknown=0, NotChecked=0, Total=3080 [2023-08-30 15:23:01,352 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 [0] [2023-08-30 15:23:03,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:23:06,162 WARN L539 Checker$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 15:23:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 247 [2023-08-30 15:23:06,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 163 transitions, 1854 flow. Second operand has 56 states, 56 states have (on average 85.07142857142857) internal successors, (4764), 56 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states 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 15:23:06,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:06,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 247 [2023-08-30 15:23:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:26,521 INFO L130 PetriNetUnfolder]: 13114/23717 cut-off events. [2023-08-30 15:23:26,521 INFO L131 PetriNetUnfolder]: For 143889/145480 co-relation queries the response was YES. [2023-08-30 15:23:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186249 conditions, 23717 events. 13114/23717 cut-off events. For 143889/145480 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 197244 event pairs, 6653 based on Foata normal form. 1963/25675 useless extension candidates. Maximal degree in co-relation 186198. Up to 7316 conditions per place. [2023-08-30 15:23:26,704 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 444 selfloop transitions, 214 changer transitions 7/667 dead transitions. [2023-08-30 15:23:26,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 667 transitions, 8426 flow [2023-08-30 15:23:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 15:23:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 15:23:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 8767 transitions. [2023-08-30 15:23:26,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35493927125506075 [2023-08-30 15:23:26,709 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 8767 transitions. [2023-08-30 15:23:26,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 8767 transitions. [2023-08-30 15:23:26,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:26,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 8767 transitions. [2023-08-30 15:23:26,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 87.67) internal successors, (8767), 100 states have internal predecessors, (8767), 0 states have call successors, (0), 0 states 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 15:23:26,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 247.0) internal successors, (24947), 101 states have internal predecessors, (24947), 0 states have call successors, (0), 0 states 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 15:23:26,726 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 247.0) internal successors, (24947), 101 states have internal predecessors, (24947), 0 states have call successors, (0), 0 states 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 15:23:26,726 INFO L175 Difference]: Start difference. First operand has 296 places, 163 transitions, 1854 flow. Second operand 100 states and 8767 transitions. [2023-08-30 15:23:26,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 667 transitions, 8426 flow [2023-08-30 15:23:27,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 667 transitions, 8262 flow, removed 24 selfloop flow, removed 18 redundant places. [2023-08-30 15:23:27,074 INFO L231 Difference]: Finished difference. Result has 394 places, 287 transitions, 3965 flow [2023-08-30 15:23:27,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=3965, PETRI_PLACES=394, PETRI_TRANSITIONS=287} [2023-08-30 15:23:27,074 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 357 predicate places. [2023-08-30 15:23:27,074 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 287 transitions, 3965 flow [2023-08-30 15:23:27,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 85.07142857142857) internal successors, (4764), 56 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states 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 15:23:27,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:27,075 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:27,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 15:23:27,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 15:23:27,276 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:23:27,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash 998216836, now seen corresponding path program 11 times [2023-08-30 15:23:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:27,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117277659] [2023-08-30 15:23:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117277659] [2023-08-30 15:23:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117277659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999060602] [2023-08-30 15:23:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:23:27,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:27,700 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:23:27,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 15:23:27,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 15:23:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 15:23:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:28,180 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 15:23:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:28,213 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 15:23:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:28,241 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 15:23:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:28,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:28,616 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2748 (Array Int Int)) (v_ArrVal_2747 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2748) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 15:23:28,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:28,622 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 27 treesize of output 28 [2023-08-30 15:23:28,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:28,626 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 71 treesize of output 65 [2023-08-30 15:23:28,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:23:28,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 42 [2023-08-30 15:23:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-30 15:23:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999060602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:28,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:28,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-30 15:23:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287251568] [2023-08-30 15:23:28,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:28,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 15:23:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 15:23:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2284, Unknown=7, NotChecked=96, Total=2550 [2023-08-30 15:23:28,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:23:28,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 287 transitions, 3965 flow. Second operand has 51 states, 51 states have (on average 78.13725490196079) internal successors, (3985), 51 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states 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 15:23:28,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:28,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:23:28,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:33,746 INFO L130 PetriNetUnfolder]: 13042/23563 cut-off events. [2023-08-30 15:23:33,747 INFO L131 PetriNetUnfolder]: For 213294/213294 co-relation queries the response was YES. [2023-08-30 15:23:33,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190785 conditions, 23563 events. 13042/23563 cut-off events. For 213294/213294 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 194969 event pairs, 2840 based on Foata normal form. 458/24021 useless extension candidates. Maximal degree in co-relation 190718. Up to 7378 conditions per place. [2023-08-30 15:23:33,972 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 934 selfloop transitions, 31 changer transitions 0/971 dead transitions. [2023-08-30 15:23:33,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 971 transitions, 17954 flow [2023-08-30 15:23:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:23:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:23:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1655 transitions. [2023-08-30 15:23:33,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350202429149798 [2023-08-30 15:23:33,974 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1655 transitions. [2023-08-30 15:23:33,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1655 transitions. [2023-08-30 15:23:33,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:23:33,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1655 transitions. [2023-08-30 15:23:33,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.75) internal successors, (1655), 20 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 15:23:33,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:23:33,978 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:23:33,978 INFO L175 Difference]: Start difference. First operand has 394 places, 287 transitions, 3965 flow. Second operand 20 states and 1655 transitions. [2023-08-30 15:23:33,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 971 transitions, 17954 flow [2023-08-30 15:23:34,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 971 transitions, 16883 flow, removed 421 selfloop flow, removed 37 redundant places. [2023-08-30 15:23:34,325 INFO L231 Difference]: Finished difference. Result has 378 places, 288 transitions, 3711 flow [2023-08-30 15:23:34,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3711, PETRI_PLACES=378, PETRI_TRANSITIONS=288} [2023-08-30 15:23:34,325 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 341 predicate places. [2023-08-30 15:23:34,325 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 288 transitions, 3711 flow [2023-08-30 15:23:34,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 78.13725490196079) internal successors, (3985), 51 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states 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 15:23:34,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:23:34,326 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 15:23:34,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-30 15:23:34,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:34,532 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:23:34,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:23:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash -900742277, now seen corresponding path program 8 times [2023-08-30 15:23:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:23:34,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684594919] [2023-08-30 15:23:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:23:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:23:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:23:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:23:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684594919] [2023-08-30 15:23:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684594919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:23:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466196041] [2023-08-30 15:23:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:23:35,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:23:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:23:35,124 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:23:35,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 15:23:35,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:23:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:23:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:23:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:23:35,882 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 15:23:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:35,938 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 18 treesize of output 20 [2023-08-30 15:23:36,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:23:36,073 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 18 treesize of output 20 [2023-08-30 15:23:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:23:36,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:36,866 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 29 treesize of output 30 [2023-08-30 15:23:36,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:23:36,872 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 79 treesize of output 71 [2023-08-30 15:23:36,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 48 [2023-08-30 15:23:36,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 20 [2023-08-30 15:23:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:23:37,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466196041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:23:37,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:23:37,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 15:23:37,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507135729] [2023-08-30 15:23:37,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:23:37,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 15:23:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:23:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 15:23:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3105, Unknown=2, NotChecked=0, Total=3422 [2023-08-30 15:23:43,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:23:43,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 288 transitions, 3711 flow. Second operand has 59 states, 59 states have (on average 69.0677966101695) internal successors, (4075), 59 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states 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 15:23:43,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:23:43,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:23:43,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:23:44,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:19,687 INFO L130 PetriNetUnfolder]: 19825/36323 cut-off events. [2023-08-30 15:24:19,687 INFO L131 PetriNetUnfolder]: For 277746/281174 co-relation queries the response was YES. [2023-08-30 15:24:19,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288404 conditions, 36323 events. 19825/36323 cut-off events. For 277746/281174 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 329216 event pairs, 5348 based on Foata normal form. 4988/41308 useless extension candidates. Maximal degree in co-relation 288335. Up to 7109 conditions per place. [2023-08-30 15:24:20,100 INFO L137 encePairwiseOnDemand]: 237/247 looper letters, 1365 selfloop transitions, 184 changer transitions 154/1705 dead transitions. [2023-08-30 15:24:20,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1705 transitions, 22475 flow [2023-08-30 15:24:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-30 15:24:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-30 15:24:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6178 transitions. [2023-08-30 15:24:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30879192282701057 [2023-08-30 15:24:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6178 transitions. [2023-08-30 15:24:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6178 transitions. [2023-08-30 15:24:20,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:20,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6178 transitions. [2023-08-30 15:24:20,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 76.27160493827161) internal successors, (6178), 81 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states 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 15:24:20,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 247.0) internal successors, (20254), 82 states have internal predecessors, (20254), 0 states have call successors, (0), 0 states 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 15:24:20,117 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 247.0) internal successors, (20254), 82 states have internal predecessors, (20254), 0 states have call successors, (0), 0 states 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 15:24:20,117 INFO L175 Difference]: Start difference. First operand has 378 places, 288 transitions, 3711 flow. Second operand 81 states and 6178 transitions. [2023-08-30 15:24:20,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1705 transitions, 22475 flow [2023-08-30 15:24:21,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1705 transitions, 21311 flow, removed 60 selfloop flow, removed 17 redundant places. [2023-08-30 15:24:21,348 INFO L231 Difference]: Finished difference. Result has 461 places, 331 transitions, 4809 flow [2023-08-30 15:24:21,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4809, PETRI_PLACES=461, PETRI_TRANSITIONS=331} [2023-08-30 15:24:21,348 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 424 predicate places. [2023-08-30 15:24:21,348 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 331 transitions, 4809 flow [2023-08-30 15:24:21,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 69.0677966101695) internal successors, (4075), 59 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states 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 15:24:21,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:21,349 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:21,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-08-30 15:24:21,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-30 15:24:21,549 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:24:21,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash 879953303, now seen corresponding path program 12 times [2023-08-30 15:24:21,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:21,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202501612] [2023-08-30 15:24:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:21,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202501612] [2023-08-30 15:24:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202501612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009363740] [2023-08-30 15:24:21,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:24:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:21,757 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:24:21,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 15:24:22,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 15:24:22,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:24:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009363740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:22,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:22,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-30 15:24:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221530681] [2023-08-30 15:24:22,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 15:24:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 15:24:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 15:24:23,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:24:23,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 331 transitions, 4809 flow. Second operand has 44 states, 44 states have (on average 95.13636363636364) internal successors, (4186), 44 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states 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 15:24:23,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:23,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:24:23,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:30,036 INFO L130 PetriNetUnfolder]: 20067/36853 cut-off events. [2023-08-30 15:24:30,036 INFO L131 PetriNetUnfolder]: For 429924/430249 co-relation queries the response was YES. [2023-08-30 15:24:30,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301585 conditions, 36853 events. 20067/36853 cut-off events. For 429924/430249 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 328484 event pairs, 10170 based on Foata normal form. 517/37366 useless extension candidates. Maximal degree in co-relation 301497. Up to 22359 conditions per place. [2023-08-30 15:24:30,516 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 296 selfloop transitions, 16 changer transitions 361/679 dead transitions. [2023-08-30 15:24:30,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 679 transitions, 11417 flow [2023-08-30 15:24:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:24:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:24:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1975 transitions. [2023-08-30 15:24:30,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39979757085020245 [2023-08-30 15:24:30,518 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1975 transitions. [2023-08-30 15:24:30,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1975 transitions. [2023-08-30 15:24:30,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:24:30,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1975 transitions. [2023-08-30 15:24:30,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 98.75) internal successors, (1975), 20 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states 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 15:24:30,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:24:30,521 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:24:30,521 INFO L175 Difference]: Start difference. First operand has 461 places, 331 transitions, 4809 flow. Second operand 20 states and 1975 transitions. [2023-08-30 15:24:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 679 transitions, 11417 flow [2023-08-30 15:24:32,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 679 transitions, 10530 flow, removed 74 selfloop flow, removed 29 redundant places. [2023-08-30 15:24:32,276 INFO L231 Difference]: Finished difference. Result has 453 places, 259 transitions, 3665 flow [2023-08-30 15:24:32,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3665, PETRI_PLACES=453, PETRI_TRANSITIONS=259} [2023-08-30 15:24:32,276 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 416 predicate places. [2023-08-30 15:24:32,276 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 259 transitions, 3665 flow [2023-08-30 15:24:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 95.13636363636364) internal successors, (4186), 44 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states 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 15:24:32,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:24:32,277 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2023-08-30 15:24:32,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 15:24:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:32,481 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:24:32,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:24:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -900742278, now seen corresponding path program 9 times [2023-08-30 15:24:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:24:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132681575] [2023-08-30 15:24:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:24:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:24:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:24:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:24:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132681575] [2023-08-30 15:24:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132681575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:24:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357189501] [2023-08-30 15:24:33,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:24:33,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:24:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:24:33,045 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:24:33,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 15:24:33,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 15:24:33,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:24:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:24:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:24:33,763 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 15:24:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:24:33,814 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 20 treesize of output 22 [2023-08-30 15:24:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:24:33,945 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 20 treesize of output 22 [2023-08-30 15:24:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:24:34,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:24:34,765 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 31 treesize of output 32 [2023-08-30 15:24:34,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:24:34,772 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 89 treesize of output 81 [2023-08-30 15:24:34,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2023-08-30 15:24:34,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 24 [2023-08-30 15:24:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:24:35,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357189501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:24:35,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:24:35,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 15:24:35,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42525758] [2023-08-30 15:24:35,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:24:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 15:24:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:24:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 15:24:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3101, Unknown=6, NotChecked=0, Total=3422 [2023-08-30 15:24:41,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:24:42,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:24:42,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 259 transitions, 3665 flow. Second operand has 59 states, 59 states have (on average 69.0677966101695) internal successors, (4075), 59 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:24:42,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:24:42,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:24:42,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:24:43,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:25:38,311 INFO L130 PetriNetUnfolder]: 15988/29474 cut-off events. [2023-08-30 15:25:38,311 INFO L131 PetriNetUnfolder]: For 340211/342861 co-relation queries the response was YES. [2023-08-30 15:25:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236535 conditions, 29474 events. 15988/29474 cut-off events. For 340211/342861 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 261283 event pairs, 4710 based on Foata normal form. 4186/33658 useless extension candidates. Maximal degree in co-relation 236446. Up to 5835 conditions per place. [2023-08-30 15:25:38,649 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 1052 selfloop transitions, 134 changer transitions 233/1420 dead transitions. [2023-08-30 15:25:38,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1420 transitions, 20286 flow [2023-08-30 15:25:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 15:25:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 15:25:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4954 transitions. [2023-08-30 15:25:38,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30856431018374336 [2023-08-30 15:25:38,652 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4954 transitions. [2023-08-30 15:25:38,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4954 transitions. [2023-08-30 15:25:38,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:38,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4954 transitions. [2023-08-30 15:25:38,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 76.21538461538462) internal successors, (4954), 65 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states 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 15:25:38,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 247.0) internal successors, (16302), 66 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states 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 15:25:38,663 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 247.0) internal successors, (16302), 66 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states 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 15:25:38,663 INFO L175 Difference]: Start difference. First operand has 453 places, 259 transitions, 3665 flow. Second operand 65 states and 4954 transitions. [2023-08-30 15:25:38,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1420 transitions, 20286 flow [2023-08-30 15:25:41,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1420 transitions, 19283 flow, removed 215 selfloop flow, removed 15 redundant places. [2023-08-30 15:25:41,736 INFO L231 Difference]: Finished difference. Result has 430 places, 249 transitions, 3455 flow [2023-08-30 15:25:41,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3455, PETRI_PLACES=430, PETRI_TRANSITIONS=249} [2023-08-30 15:25:41,737 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 393 predicate places. [2023-08-30 15:25:41,737 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 249 transitions, 3455 flow [2023-08-30 15:25:41,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 69.0677966101695) internal successors, (4075), 59 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states 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 15:25:41,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:41,737 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:41,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:41,944 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:41,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1724061510, now seen corresponding path program 7 times [2023-08-30 15:25:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:41,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043139517] [2023-08-30 15:25:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:42,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043139517] [2023-08-30 15:25:42,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043139517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:42,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608102779] [2023-08-30 15:25:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:25:42,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:42,509 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:42,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 15:25:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 15:25:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:43,029 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 15:25:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:43,066 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 23 treesize of output 22 [2023-08-30 15:25:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:43,110 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 15:25:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:43,144 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 15:25:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:43,522 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2990 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2990) c_~A~0.base) (+ c_~A~0.offset 24)) 4294967296))) is different from false [2023-08-30 15:25:43,668 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:25:43,668 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 36 treesize of output 42 [2023-08-30 15:25:43,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:43,674 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 159 treesize of output 147 [2023-08-30 15:25:43,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2023-08-30 15:25:43,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 20 [2023-08-30 15:25:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608102779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:43,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-30 15:25:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767467039] [2023-08-30 15:25:43,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 15:25:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 15:25:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2573, Unknown=10, NotChecked=102, Total=2862 [2023-08-30 15:25:43,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:25:43,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 249 transitions, 3455 flow. Second operand has 54 states, 54 states have (on average 78.12962962962963) internal successors, (4219), 54 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states 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 15:25:43,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:25:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:49,992 INFO L130 PetriNetUnfolder]: 15850/29259 cut-off events. [2023-08-30 15:25:49,992 INFO L131 PetriNetUnfolder]: For 304723/304723 co-relation queries the response was YES. [2023-08-30 15:25:50,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232216 conditions, 29259 events. 15850/29259 cut-off events. For 304723/304723 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 258486 event pairs, 3756 based on Foata normal form. 554/29813 useless extension candidates. Maximal degree in co-relation 232132. Up to 9062 conditions per place. [2023-08-30 15:25:50,295 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 965 selfloop transitions, 22 changer transitions 0/993 dead transitions. [2023-08-30 15:25:50,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 993 transitions, 18223 flow [2023-08-30 15:25:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:25:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:25:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1654 transitions. [2023-08-30 15:25:50,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33481781376518216 [2023-08-30 15:25:50,297 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1654 transitions. [2023-08-30 15:25:50,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1654 transitions. [2023-08-30 15:25:50,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:50,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1654 transitions. [2023-08-30 15:25:50,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.7) internal successors, (1654), 20 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states 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 15:25:50,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:25:50,301 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 247.0) internal successors, (5187), 21 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 15:25:50,301 INFO L175 Difference]: Start difference. First operand has 430 places, 249 transitions, 3455 flow. Second operand 20 states and 1654 transitions. [2023-08-30 15:25:50,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 993 transitions, 18223 flow [2023-08-30 15:25:51,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 993 transitions, 17210 flow, removed 33 selfloop flow, removed 42 redundant places. [2023-08-30 15:25:51,163 INFO L231 Difference]: Finished difference. Result has 407 places, 248 transitions, 3260 flow [2023-08-30 15:25:51,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3260, PETRI_PLACES=407, PETRI_TRANSITIONS=248} [2023-08-30 15:25:51,163 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 370 predicate places. [2023-08-30 15:25:51,163 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 248 transitions, 3260 flow [2023-08-30 15:25:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 78.12962962962963) internal successors, (4219), 54 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states 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 15:25:51,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:51,164 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:51,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:51,370 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:51,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1906296830, now seen corresponding path program 13 times [2023-08-30 15:25:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:51,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576187731] [2023-08-30 15:25:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576187731] [2023-08-30 15:25:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576187731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033218265] [2023-08-30 15:25:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:25:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:52,040 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:52,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 15:25:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 15:25:52,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:52,623 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 15:25:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:52,666 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 15:25:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:25:52,702 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 15:25:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:52,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:53,264 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3052 (Array Int Int)) (v_ArrVal_3051 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3051) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3052) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-30 15:25:53,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:53,270 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 27 treesize of output 28 [2023-08-30 15:25:53,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:25:53,276 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 141 treesize of output 129 [2023-08-30 15:25:53,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:25:53,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:25:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-30 15:25:53,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033218265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:53,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:53,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-30 15:25:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813167641] [2023-08-30 15:25:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-30 15:25:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-30 15:25:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2894, Unknown=8, NotChecked=108, Total=3192 [2023-08-30 15:25:53,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:25:53,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 248 transitions, 3260 flow. Second operand has 57 states, 57 states have (on average 78.12280701754386) internal successors, (4453), 57 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states 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 15:25:53,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:53,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:25:53,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:59,620 INFO L130 PetriNetUnfolder]: 15165/27976 cut-off events. [2023-08-30 15:25:59,620 INFO L131 PetriNetUnfolder]: For 299639/299723 co-relation queries the response was YES. [2023-08-30 15:25:59,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221627 conditions, 27976 events. 15165/27976 cut-off events. For 299639/299723 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 246490 event pairs, 1996 based on Foata normal form. 636/28608 useless extension candidates. Maximal degree in co-relation 221547. Up to 5463 conditions per place. [2023-08-30 15:25:59,895 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 1052 selfloop transitions, 24 changer transitions 0/1082 dead transitions. [2023-08-30 15:25:59,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1082 transitions, 18856 flow [2023-08-30 15:25:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:25:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:25:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1820 transitions. [2023-08-30 15:25:59,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349282296650718 [2023-08-30 15:25:59,897 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1820 transitions. [2023-08-30 15:25:59,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1820 transitions. [2023-08-30 15:25:59,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:59,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1820 transitions. [2023-08-30 15:25:59,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 82.72727272727273) internal successors, (1820), 22 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states 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 15:25:59,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states 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 15:25:59,901 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 247.0) internal successors, (5681), 23 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states 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 15:25:59,901 INFO L175 Difference]: Start difference. First operand has 407 places, 248 transitions, 3260 flow. Second operand 22 states and 1820 transitions. [2023-08-30 15:25:59,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1082 transitions, 18856 flow [2023-08-30 15:26:00,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1082 transitions, 18375 flow, removed 3 selfloop flow, removed 18 redundant places. [2023-08-30 15:26:00,851 INFO L231 Difference]: Finished difference. Result has 412 places, 249 transitions, 3248 flow [2023-08-30 15:26:00,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3248, PETRI_PLACES=412, PETRI_TRANSITIONS=249} [2023-08-30 15:26:00,851 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 375 predicate places. [2023-08-30 15:26:00,851 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 249 transitions, 3248 flow [2023-08-30 15:26:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 78.12280701754386) internal successors, (4453), 57 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states 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 15:26:00,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:00,852 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:00,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-30 15:26:01,052 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:01,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1906296829, now seen corresponding path program 8 times [2023-08-30 15:26:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:01,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964215338] [2023-08-30 15:26:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964215338] [2023-08-30 15:26:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964215338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156186690] [2023-08-30 15:26:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:01,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:01,704 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:01,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 15:26:02,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:26:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:26:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:02,309 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 15:26:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:02,369 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 20 treesize of output 22 [2023-08-30 15:26:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:02,425 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 20 treesize of output 22 [2023-08-30 15:26:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:02,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:03,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:03,405 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 31 treesize of output 32 [2023-08-30 15:26:03,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:03,414 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 89 treesize of output 81 [2023-08-30 15:26:03,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 56 [2023-08-30 15:26:03,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 24 [2023-08-30 15:26:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:04,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156186690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:04,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:04,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-08-30 15:26:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645754502] [2023-08-30 15:26:04,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 15:26:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 15:26:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3088, Unknown=3, NotChecked=0, Total=3422 [2023-08-30 15:26:09,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:26:09,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 249 transitions, 3248 flow. Second operand has 59 states, 59 states have (on average 69.11864406779661) internal successors, (4078), 59 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states 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 15:26:09,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:09,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:26:09,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:10,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:26:24,067 INFO L130 PetriNetUnfolder]: 14192/26270 cut-off events. [2023-08-30 15:26:24,068 INFO L131 PetriNetUnfolder]: For 265722/265800 co-relation queries the response was YES. [2023-08-30 15:26:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208724 conditions, 26270 events. 14192/26270 cut-off events. For 265722/265800 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 228527 event pairs, 678 based on Foata normal form. 986/27254 useless extension candidates. Maximal degree in co-relation 208644. Up to 5525 conditions per place. [2023-08-30 15:26:24,366 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 1481 selfloop transitions, 71 changer transitions 518/2076 dead transitions. [2023-08-30 15:26:24,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 2076 transitions, 34888 flow [2023-08-30 15:26:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 15:26:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 15:26:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4844 transitions. [2023-08-30 15:26:24,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3017128620367487 [2023-08-30 15:26:24,369 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4844 transitions. [2023-08-30 15:26:24,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4844 transitions. [2023-08-30 15:26:24,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:24,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4844 transitions. [2023-08-30 15:26:24,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 74.52307692307693) internal successors, (4844), 65 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states 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 15:26:24,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 247.0) internal successors, (16302), 66 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states 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 15:26:24,379 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 247.0) internal successors, (16302), 66 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states 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 15:26:24,379 INFO L175 Difference]: Start difference. First operand has 412 places, 249 transitions, 3248 flow. Second operand 65 states and 4844 transitions. [2023-08-30 15:26:24,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 2076 transitions, 34888 flow [2023-08-30 15:26:25,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2076 transitions, 34773 flow, removed 5 selfloop flow, removed 21 redundant places. [2023-08-30 15:26:25,197 INFO L231 Difference]: Finished difference. Result has 458 places, 291 transitions, 3826 flow [2023-08-30 15:26:25,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3826, PETRI_PLACES=458, PETRI_TRANSITIONS=291} [2023-08-30 15:26:25,198 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 421 predicate places. [2023-08-30 15:26:25,198 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 291 transitions, 3826 flow [2023-08-30 15:26:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 69.11864406779661) internal successors, (4078), 59 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states 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 15:26:25,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:25,198 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:25,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:25,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-30 15:26:25,404 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:25,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1034342873, now seen corresponding path program 14 times [2023-08-30 15:26:25,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:25,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829174697] [2023-08-30 15:26:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:25,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829174697] [2023-08-30 15:26:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829174697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651333283] [2023-08-30 15:26:25,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:25,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:25,647 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-30 15:26:25,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:26:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 15:26:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:26,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651333283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:26,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:26,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-30 15:26:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950750624] [2023-08-30 15:26:26,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:26,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 15:26:26,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 15:26:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 15:26:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:26:26,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 291 transitions, 3826 flow. Second operand has 49 states, 49 states have (on average 95.12244897959184) internal successors, (4661), 49 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states 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 15:26:26,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:26,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:26:26,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:31,989 INFO L130 PetriNetUnfolder]: 13727/25611 cut-off events. [2023-08-30 15:26:31,990 INFO L131 PetriNetUnfolder]: For 243979/244057 co-relation queries the response was YES. [2023-08-30 15:26:32,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207943 conditions, 25611 events. 13727/25611 cut-off events. For 243979/244057 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 222545 event pairs, 4683 based on Foata normal form. 466/26075 useless extension candidates. Maximal degree in co-relation 207862. Up to 9911 conditions per place. [2023-08-30 15:26:32,283 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 189 selfloop transitions, 28 changer transitions 963/1184 dead transitions. [2023-08-30 15:26:32,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1184 transitions, 18906 flow [2023-08-30 15:26:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:26:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:26:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2971 transitions. [2023-08-30 15:26:32,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400944669365722 [2023-08-30 15:26:32,285 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2971 transitions. [2023-08-30 15:26:32,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2971 transitions. [2023-08-30 15:26:32,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:32,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2971 transitions. [2023-08-30 15:26:32,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 99.03333333333333) internal successors, (2971), 30 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states 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 15:26:32,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states 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 15:26:32,291 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 247.0) internal successors, (7657), 31 states have internal predecessors, (7657), 0 states have call successors, (0), 0 states 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 15:26:32,291 INFO L175 Difference]: Start difference. First operand has 458 places, 291 transitions, 3826 flow. Second operand 30 states and 2971 transitions. [2023-08-30 15:26:32,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1184 transitions, 18906 flow [2023-08-30 15:26:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1184 transitions, 18726 flow, removed 22 selfloop flow, removed 22 redundant places. [2023-08-30 15:26:33,274 INFO L231 Difference]: Finished difference. Result has 466 places, 192 transitions, 2456 flow [2023-08-30 15:26:33,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2456, PETRI_PLACES=466, PETRI_TRANSITIONS=192} [2023-08-30 15:26:33,275 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 429 predicate places. [2023-08-30 15:26:33,275 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 192 transitions, 2456 flow [2023-08-30 15:26:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 95.12244897959184) internal successors, (4661), 49 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states 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 15:26:33,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:33,276 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2023-08-30 15:26:33,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:33,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-30 15:26:33,483 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:33,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1361009486, now seen corresponding path program 9 times [2023-08-30 15:26:33,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:33,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083484534] [2023-08-30 15:26:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:33,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083484534] [2023-08-30 15:26:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083484534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820036811] [2023-08-30 15:26:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:26:34,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:34,158 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:34,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-30 15:26:34,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:26:34,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 15:26:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:34,888 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 13 treesize of output 9 [2023-08-30 15:26:34,927 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 15:26:34,927 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 25 treesize of output 24 [2023-08-30 15:26:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:34,958 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 15:26:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:35,500 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3239 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3239) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:26:35,570 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:26:35,571 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 31 treesize of output 37 [2023-08-30 15:26:35,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:35,576 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 37 treesize of output 31 [2023-08-30 15:26:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 15:26:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820036811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:35,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2023-08-30 15:26:35,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493213290] [2023-08-30 15:26:35,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:35,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-30 15:26:35,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-30 15:26:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3795, Unknown=17, NotChecked=124, Total=4160 [2023-08-30 15:26:35,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:26:35,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 192 transitions, 2456 flow. Second operand has 65 states, 65 states have (on average 81.06153846153846) internal successors, (5269), 65 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states 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 15:26:35,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:35,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:26:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:40,291 INFO L130 PetriNetUnfolder]: 8349/16131 cut-off events. [2023-08-30 15:26:40,291 INFO L131 PetriNetUnfolder]: For 137366/138512 co-relation queries the response was YES. [2023-08-30 15:26:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132632 conditions, 16131 events. 8349/16131 cut-off events. For 137366/138512 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 135656 event pairs, 6937 based on Foata normal form. 1143/17161 useless extension candidates. Maximal degree in co-relation 132551. Up to 15030 conditions per place. [2023-08-30 15:26:40,427 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 165 selfloop transitions, 82 changer transitions 0/249 dead transitions. [2023-08-30 15:26:40,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 249 transitions, 3722 flow [2023-08-30 15:26:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:26:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:26:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1992 transitions. [2023-08-30 15:26:40,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3360323886639676 [2023-08-30 15:26:40,429 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1992 transitions. [2023-08-30 15:26:40,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1992 transitions. [2023-08-30 15:26:40,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:40,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1992 transitions. [2023-08-30 15:26:40,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.0) internal successors, (1992), 24 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 15:26:40,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:26:40,433 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:26:40,433 INFO L175 Difference]: Start difference. First operand has 466 places, 192 transitions, 2456 flow. Second operand 24 states and 1992 transitions. [2023-08-30 15:26:40,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 249 transitions, 3722 flow [2023-08-30 15:26:41,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 249 transitions, 3546 flow, removed 60 selfloop flow, removed 30 redundant places. [2023-08-30 15:26:41,838 INFO L231 Difference]: Finished difference. Result has 377 places, 199 transitions, 2628 flow [2023-08-30 15:26:41,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2628, PETRI_PLACES=377, PETRI_TRANSITIONS=199} [2023-08-30 15:26:41,839 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 340 predicate places. [2023-08-30 15:26:41,839 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 199 transitions, 2628 flow [2023-08-30 15:26:41,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 81.06153846153846) internal successors, (5269), 65 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states 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 15:26:41,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:41,839 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2023-08-30 15:26:41,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:42,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 15:26:42,040 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:42,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1361009487, now seen corresponding path program 8 times [2023-08-30 15:26:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:42,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746765550] [2023-08-30 15:26:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746765550] [2023-08-30 15:26:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746765550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684988303] [2023-08-30 15:26:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:42,707 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:42,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-30 15:26:43,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:26:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 15:26:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:43,293 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 15:26:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:43,324 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 23 treesize of output 22 [2023-08-30 15:26:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:43,362 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 15:26:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:43,666 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3306 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3306) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-30 15:26:43,733 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:26:43,734 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 33 treesize of output 39 [2023-08-30 15:26:43,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:43,739 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 43 treesize of output 37 [2023-08-30 15:26:43,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2023-08-30 15:26:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 15:26:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684988303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:43,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:43,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2023-08-30 15:26:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154139135] [2023-08-30 15:26:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-08-30 15:26:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-08-30 15:26:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2682, Unknown=15, NotChecked=104, Total=2970 [2023-08-30 15:26:44,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 247 [2023-08-30 15:26:44,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 199 transitions, 2628 flow. Second operand has 55 states, 55 states have (on average 81.05454545454545) internal successors, (4458), 55 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states 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 15:26:44,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:44,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 247 [2023-08-30 15:26:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:47,359 INFO L130 PetriNetUnfolder]: 8327/16064 cut-off events. [2023-08-30 15:26:47,359 INFO L131 PetriNetUnfolder]: For 86948/88094 co-relation queries the response was YES. [2023-08-30 15:26:47,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128083 conditions, 16064 events. 8327/16064 cut-off events. For 86948/88094 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 134809 event pairs, 6877 based on Foata normal form. 1143/17096 useless extension candidates. Maximal degree in co-relation 128020. Up to 14965 conditions per place. [2023-08-30 15:26:47,484 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 164 selfloop transitions, 81 changer transitions 0/247 dead transitions. [2023-08-30 15:26:47,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 247 transitions, 3698 flow [2023-08-30 15:26:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:26:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:26:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1991 transitions. [2023-08-30 15:26:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335863697705803 [2023-08-30 15:26:47,485 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1991 transitions. [2023-08-30 15:26:47,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1991 transitions. [2023-08-30 15:26:47,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:47,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1991 transitions. [2023-08-30 15:26:47,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 82.95833333333333) internal successors, (1991), 24 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 15:26:47,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:26:47,489 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:26:47,489 INFO L175 Difference]: Start difference. First operand has 377 places, 199 transitions, 2628 flow. Second operand 24 states and 1991 transitions. [2023-08-30 15:26:47,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 247 transitions, 3698 flow [2023-08-30 15:26:47,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 247 transitions, 3509 flow, removed 7 selfloop flow, removed 22 redundant places. [2023-08-30 15:26:47,679 INFO L231 Difference]: Finished difference. Result has 378 places, 197 transitions, 2565 flow [2023-08-30 15:26:47,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2565, PETRI_PLACES=378, PETRI_TRANSITIONS=197} [2023-08-30 15:26:47,679 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 341 predicate places. [2023-08-30 15:26:47,680 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 197 transitions, 2565 flow [2023-08-30 15:26:47,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 81.05454545454545) internal successors, (4458), 55 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states 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 15:26:47,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:47,680 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:47,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-08-30 15:26:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:47,881 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:47,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash -787409471, now seen corresponding path program 2 times [2023-08-30 15:26:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:47,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699101600] [2023-08-30 15:26:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 15:26:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699101600] [2023-08-30 15:26:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699101600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243253927] [2023-08-30 15:26:47,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:47,993 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:47,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-30 15:26:48,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:26:48,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:26:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-08-30 15:26:48,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:26:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243253927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:26:48,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:26:48,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [10] total 11 [2023-08-30 15:26:48,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080657979] [2023-08-30 15:26:48,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:26:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:26:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:48,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:26:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:26:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 247 [2023-08-30 15:26:48,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 197 transitions, 2565 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:26:48,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:48,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 247 [2023-08-30 15:26:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:50,384 INFO L130 PetriNetUnfolder]: 7709/14924 cut-off events. [2023-08-30 15:26:50,384 INFO L131 PetriNetUnfolder]: For 62289/63438 co-relation queries the response was YES. [2023-08-30 15:26:50,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112355 conditions, 14924 events. 7709/14924 cut-off events. For 62289/63438 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 124516 event pairs, 7041 based on Foata normal form. 1563/16382 useless extension candidates. Maximal degree in co-relation 112293. Up to 14870 conditions per place. [2023-08-30 15:26:50,652 INFO L137 encePairwiseOnDemand]: 244/247 looper letters, 182 selfloop transitions, 1 changer transitions 0/189 dead transitions. [2023-08-30 15:26:50,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 189 transitions, 2637 flow [2023-08-30 15:26:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:26:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:26:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-30 15:26:50,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446693657219973 [2023-08-30 15:26:50,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-30 15:26:50,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-30 15:26:50,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:50,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-30 15:26:50,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 15:26:50,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:26:50,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 15:26:50,655 INFO L175 Difference]: Start difference. First operand has 378 places, 197 transitions, 2565 flow. Second operand 3 states and 331 transitions. [2023-08-30 15:26:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 189 transitions, 2637 flow [2023-08-30 15:26:50,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 189 transitions, 2348 flow, removed 20 selfloop flow, removed 39 redundant places. [2023-08-30 15:26:50,830 INFO L231 Difference]: Finished difference. Result has 309 places, 189 transitions, 1984 flow [2023-08-30 15:26:50,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1984, PETRI_PLACES=309, PETRI_TRANSITIONS=189} [2023-08-30 15:26:50,831 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 272 predicate places. [2023-08-30 15:26:50,831 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 189 transitions, 1984 flow [2023-08-30 15:26:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:26:50,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:50,831 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:50,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-08-30 15:26:51,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:51,034 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:51,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1360782669, now seen corresponding path program 10 times [2023-08-30 15:26:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:51,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376288709] [2023-08-30 15:26:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:51,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376288709] [2023-08-30 15:26:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376288709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194017882] [2023-08-30 15:26:51,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:26:51,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:51,857 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:51,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-30 15:26:52,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:26:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-30 15:26:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:52,485 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 15:26:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:52,527 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 23 treesize of output 22 [2023-08-30 15:26:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:52,569 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 15:26:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:52,743 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 15:26:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:52,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:53,104 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3440 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3440) c_~A~0.base) (+ c_~A~0.offset 32 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 9223372039002259456))) is different from false [2023-08-30 15:26:53,107 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3440 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3440) c_~A~0.base) (+ c_~A~0.offset 32)) 9223372039002259456))) is different from false [2023-08-30 15:26:53,243 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:26:53,244 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 36 treesize of output 42 [2023-08-30 15:26:53,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:26:53,249 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 81 treesize of output 75 [2023-08-30 15:26:53,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:26:53,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:26:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-30 15:26:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194017882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:53,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:53,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2023-08-30 15:26:53,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384468419] [2023-08-30 15:26:53,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:53,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-30 15:26:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-30 15:26:53,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3306, Unknown=49, NotChecked=234, Total=3782 [2023-08-30 15:26:53,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:26:53,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 189 transitions, 1984 flow. Second operand has 62 states, 62 states have (on average 78.06451612903226) internal successors, (4840), 62 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states 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 15:26:53,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:53,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:26:53,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:57,571 INFO L130 PetriNetUnfolder]: 7726/14896 cut-off events. [2023-08-30 15:26:57,571 INFO L131 PetriNetUnfolder]: For 39657/40522 co-relation queries the response was YES. [2023-08-30 15:26:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108434 conditions, 14896 events. 7726/14896 cut-off events. For 39657/40522 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 124783 event pairs, 4142 based on Foata normal form. 906/15756 useless extension candidates. Maximal degree in co-relation 108386. Up to 6219 conditions per place. [2023-08-30 15:26:57,659 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 448 selfloop transitions, 54 changer transitions 90/594 dead transitions. [2023-08-30 15:26:57,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 594 transitions, 7236 flow [2023-08-30 15:26:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:26:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:26:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1906 transitions. [2023-08-30 15:26:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33550431262101743 [2023-08-30 15:26:57,661 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1906 transitions. [2023-08-30 15:26:57,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1906 transitions. [2023-08-30 15:26:57,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:57,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1906 transitions. [2023-08-30 15:26:57,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.8695652173913) internal successors, (1906), 23 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states 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 15:26:57,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:26:57,665 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:26:57,665 INFO L175 Difference]: Start difference. First operand has 309 places, 189 transitions, 1984 flow. Second operand 23 states and 1906 transitions. [2023-08-30 15:26:57,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 594 transitions, 7236 flow [2023-08-30 15:26:57,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 594 transitions, 7209 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 15:26:57,790 INFO L231 Difference]: Finished difference. Result has 331 places, 181 transitions, 1981 flow [2023-08-30 15:26:57,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1981, PETRI_PLACES=331, PETRI_TRANSITIONS=181} [2023-08-30 15:26:57,791 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 294 predicate places. [2023-08-30 15:26:57,791 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 181 transitions, 1981 flow [2023-08-30 15:26:57,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 78.06451612903226) internal successors, (4840), 62 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states 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 15:26:57,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:57,791 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:57,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-08-30 15:26:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-30 15:26:57,992 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:57,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -787409532, now seen corresponding path program 15 times [2023-08-30 15:26:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:57,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039025833] [2023-08-30 15:26:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:58,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:58,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039025833] [2023-08-30 15:26:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039025833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802746095] [2023-08-30 15:26:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:26:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:58,640 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:58,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-30 15:26:59,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:26:59,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 15:26:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:59,594 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 15:26:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:59,631 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 15:26:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:26:59,665 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 15:26:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:59,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:59,971 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3506 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3506) c_~A~0.base) (+ c_~A~0.offset 32)) 9223372039002259456)) is different from false [2023-08-30 15:27:00,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:00,022 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 27 treesize of output 28 [2023-08-30 15:27:00,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:00,026 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 71 treesize of output 65 [2023-08-30 15:27:00,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 46 [2023-08-30 15:27:00,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-08-30 15:27:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802746095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:00,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2023-08-30 15:27:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350851601] [2023-08-30 15:27:00,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-08-30 15:27:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-08-30 15:27:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2690, Unknown=6, NotChecked=104, Total=2970 [2023-08-30 15:27:00,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:27:00,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 181 transitions, 1981 flow. Second operand has 55 states, 55 states have (on average 78.10909090909091) internal successors, (4296), 55 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states 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 15:27:00,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:00,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:27:00,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:03,795 INFO L130 PetriNetUnfolder]: 7339/14191 cut-off events. [2023-08-30 15:27:03,795 INFO L131 PetriNetUnfolder]: For 56882/56906 co-relation queries the response was YES. [2023-08-30 15:27:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98935 conditions, 14191 events. 7339/14191 cut-off events. For 56882/56906 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 117332 event pairs, 1100 based on Foata normal form. 376/14567 useless extension candidates. Maximal degree in co-relation 98886. Up to 3597 conditions per place. [2023-08-30 15:27:03,912 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 599 selfloop transitions, 34 changer transitions 0/637 dead transitions. [2023-08-30 15:27:03,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 637 transitions, 9462 flow [2023-08-30 15:27:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:27:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:27:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1888 transitions. [2023-08-30 15:27:03,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323358563633163 [2023-08-30 15:27:03,914 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1888 transitions. [2023-08-30 15:27:03,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1888 transitions. [2023-08-30 15:27:03,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:03,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1888 transitions. [2023-08-30 15:27:03,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.08695652173913) internal successors, (1888), 23 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states 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 15:27:03,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:27:03,918 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:27:03,918 INFO L175 Difference]: Start difference. First operand has 331 places, 181 transitions, 1981 flow. Second operand 23 states and 1888 transitions. [2023-08-30 15:27:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 637 transitions, 9462 flow [2023-08-30 15:27:04,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 637 transitions, 9052 flow, removed 0 selfloop flow, removed 20 redundant places. [2023-08-30 15:27:04,018 INFO L231 Difference]: Finished difference. Result has 329 places, 183 transitions, 1997 flow [2023-08-30 15:27:04,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1997, PETRI_PLACES=329, PETRI_TRANSITIONS=183} [2023-08-30 15:27:04,019 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 292 predicate places. [2023-08-30 15:27:04,019 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 183 transitions, 1997 flow [2023-08-30 15:27:04,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 78.10909090909091) internal successors, (4296), 55 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states 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 15:27:04,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:04,019 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1] [2023-08-30 15:27:04,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-08-30 15:27:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:04,220 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:04,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1767964544, now seen corresponding path program 9 times [2023-08-30 15:27:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:04,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759768723] [2023-08-30 15:27:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759768723] [2023-08-30 15:27:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759768723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337145405] [2023-08-30 15:27:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:27:05,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:05,029 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:27:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-30 15:27:05,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:27:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:27:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 15:27:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:05,803 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 13 treesize of output 9 [2023-08-30 15:27:05,850 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 15:27:05,850 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 25 treesize of output 24 [2023-08-30 15:27:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:05,892 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 15:27:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:05,966 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 15:27:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:06,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:27:06,654 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3578 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3578) c_~A~0.base) (+ c_~A~0.offset 32)) 4294967296)) is different from false [2023-08-30 15:27:06,659 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3577 (Array Int Int)) (v_ArrVal_3578 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3577) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3578) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-30 15:27:06,767 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:27:06,767 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 34 treesize of output 40 [2023-08-30 15:27:06,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:06,773 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 71 treesize of output 65 [2023-08-30 15:27:06,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:27:06,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 42 [2023-08-30 15:27:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 15:27:07,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337145405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:07,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:07,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 15:27:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251350982] [2023-08-30 15:27:07,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 15:27:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 15:27:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4086, Unknown=22, NotChecked=258, Total=4556 [2023-08-30 15:27:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:27:07,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 183 transitions, 1997 flow. Second operand has 68 states, 68 states have (on average 78.05882352941177) internal successors, (5308), 68 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states 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 15:27:07,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:07,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:27:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:12,019 INFO L130 PetriNetUnfolder]: 6967/13489 cut-off events. [2023-08-30 15:27:12,019 INFO L131 PetriNetUnfolder]: For 55513/56649 co-relation queries the response was YES. [2023-08-30 15:27:12,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99260 conditions, 13489 events. 6967/13489 cut-off events. For 55513/56649 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 111096 event pairs, 3895 based on Foata normal form. 1182/14633 useless extension candidates. Maximal degree in co-relation 99209. Up to 5708 conditions per place. [2023-08-30 15:27:12,114 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 469 selfloop transitions, 54 changer transitions 0/525 dead transitions. [2023-08-30 15:27:12,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 525 transitions, 6641 flow [2023-08-30 15:27:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:27:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:27:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1905 transitions. [2023-08-30 15:27:12,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3353282872733674 [2023-08-30 15:27:12,115 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1905 transitions. [2023-08-30 15:27:12,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1905 transitions. [2023-08-30 15:27:12,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:12,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1905 transitions. [2023-08-30 15:27:12,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.82608695652173) internal successors, (1905), 23 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 15:27:12,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:27:12,119 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:27:12,119 INFO L175 Difference]: Start difference. First operand has 329 places, 183 transitions, 1997 flow. Second operand 23 states and 1905 transitions. [2023-08-30 15:27:12,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 525 transitions, 6641 flow [2023-08-30 15:27:12,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 525 transitions, 6220 flow, removed 34 selfloop flow, removed 20 redundant places. [2023-08-30 15:27:12,285 INFO L231 Difference]: Finished difference. Result has 331 places, 182 transitions, 2004 flow [2023-08-30 15:27:12,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2004, PETRI_PLACES=331, PETRI_TRANSITIONS=182} [2023-08-30 15:27:12,286 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 294 predicate places. [2023-08-30 15:27:12,286 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 182 transitions, 2004 flow [2023-08-30 15:27:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 78.05882352941177) internal successors, (5308), 68 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states 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 15:27:12,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:12,287 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2023-08-30 15:27:12,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-30 15:27:12,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:12,487 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:12,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash 758381207, now seen corresponding path program 10 times [2023-08-30 15:27:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:12,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076853271] [2023-08-30 15:27:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:13,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076853271] [2023-08-30 15:27:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076853271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925902046] [2023-08-30 15:27:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:27:13,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:13,137 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:27:13,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-30 15:27:13,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:27:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:27:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 15:27:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:13,773 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 13 treesize of output 9 [2023-08-30 15:27:13,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:13,809 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 15:27:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:27:14,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:14,636 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 24 treesize of output 25 [2023-08-30 15:27:14,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:14,640 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 37 treesize of output 31 [2023-08-30 15:27:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925902046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:15,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:15,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 15:27:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039086703] [2023-08-30 15:27:15,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 15:27:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 15:27:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4346, Unknown=8, NotChecked=0, Total=4556 [2023-08-30 15:27:21,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 247 [2023-08-30 15:27:21,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 182 transitions, 2004 flow. Second operand has 68 states, 68 states have (on average 93.05882352941177) internal successors, (6328), 68 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states 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 15:27:21,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:21,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 247 [2023-08-30 15:27:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:25,367 INFO L130 PetriNetUnfolder]: 6943/13422 cut-off events. [2023-08-30 15:27:25,367 INFO L131 PetriNetUnfolder]: For 52699/53676 co-relation queries the response was YES. [2023-08-30 15:27:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95788 conditions, 13422 events. 6943/13422 cut-off events. For 52699/53676 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 108730 event pairs, 5694 based on Foata normal form. 974/14306 useless extension candidates. Maximal degree in co-relation 95738. Up to 8952 conditions per place. [2023-08-30 15:27:25,473 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 182 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2023-08-30 15:27:25,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 234 transitions, 3023 flow [2023-08-30 15:27:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:27:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:27:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2476 transitions. [2023-08-30 15:27:25,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38554967299906573 [2023-08-30 15:27:25,475 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2476 transitions. [2023-08-30 15:27:25,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2476 transitions. [2023-08-30 15:27:25,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:25,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2476 transitions. [2023-08-30 15:27:25,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.23076923076923) internal successors, (2476), 26 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states 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 15:27:25,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states 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 15:27:25,480 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 247.0) internal successors, (6669), 27 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states 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 15:27:25,480 INFO L175 Difference]: Start difference. First operand has 331 places, 182 transitions, 2004 flow. Second operand 26 states and 2476 transitions. [2023-08-30 15:27:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 234 transitions, 3023 flow [2023-08-30 15:27:25,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 234 transitions, 2909 flow, removed 4 selfloop flow, removed 21 redundant places. [2023-08-30 15:27:25,605 INFO L231 Difference]: Finished difference. Result has 339 places, 189 transitions, 2100 flow [2023-08-30 15:27:25,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2100, PETRI_PLACES=339, PETRI_TRANSITIONS=189} [2023-08-30 15:27:25,606 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 302 predicate places. [2023-08-30 15:27:25,606 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 189 transitions, 2100 flow [2023-08-30 15:27:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 93.05882352941177) internal successors, (6328), 68 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states 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 15:27:25,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:25,606 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2023-08-30 15:27:25,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-30 15:27:25,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:25,807 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:25,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash 758381206, now seen corresponding path program 9 times [2023-08-30 15:27:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:25,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742762008] [2023-08-30 15:27:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:26,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742762008] [2023-08-30 15:27:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742762008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579917275] [2023-08-30 15:27:26,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:27:26,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:26,451 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:27:26,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-30 15:27:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:27:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:27:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:27:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:27,397 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 15:27:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:27:27,450 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 20 treesize of output 22 [2023-08-30 15:27:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:27,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:27:28,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:28,602 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 28 treesize of output 29 [2023-08-30 15:27:28,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:27:28,608 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 47 treesize of output 39 [2023-08-30 15:27:28,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 9 [2023-08-30 15:27:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:29,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579917275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:27:29,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:27:29,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 15:27:29,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85541461] [2023-08-30 15:27:29,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:27:29,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 15:27:29,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 15:27:29,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2023-08-30 15:27:35,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 247 [2023-08-30 15:27:35,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 189 transitions, 2100 flow. Second operand has 68 states, 68 states have (on average 85.05882352941177) internal successors, (5784), 68 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states 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 15:27:35,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:35,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 247 [2023-08-30 15:27:35,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:37,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:27:42,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:27:44,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:27:59,172 INFO L130 PetriNetUnfolder]: 12455/22420 cut-off events. [2023-08-30 15:27:59,173 INFO L131 PetriNetUnfolder]: For 104067/105747 co-relation queries the response was YES. [2023-08-30 15:27:59,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173758 conditions, 22420 events. 12455/22420 cut-off events. For 104067/105747 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 183282 event pairs, 5942 based on Foata normal form. 1922/24286 useless extension candidates. Maximal degree in co-relation 173705. Up to 5832 conditions per place. [2023-08-30 15:27:59,390 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 577 selfloop transitions, 259 changer transitions 9/847 dead transitions. [2023-08-30 15:27:59,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 847 transitions, 10430 flow [2023-08-30 15:27:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-08-30 15:27:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-08-30 15:27:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 10588 transitions. [2023-08-30 15:27:59,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35426774182755044 [2023-08-30 15:27:59,395 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 10588 transitions. [2023-08-30 15:27:59,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 10588 transitions. [2023-08-30 15:27:59,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:59,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 10588 transitions. [2023-08-30 15:27:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 87.50413223140495) internal successors, (10588), 121 states have internal predecessors, (10588), 0 states have call successors, (0), 0 states 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 15:27:59,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 247.0) internal successors, (30134), 122 states have internal predecessors, (30134), 0 states have call successors, (0), 0 states 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 15:27:59,414 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 247.0) internal successors, (30134), 122 states have internal predecessors, (30134), 0 states have call successors, (0), 0 states 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 15:27:59,414 INFO L175 Difference]: Start difference. First operand has 339 places, 189 transitions, 2100 flow. Second operand 121 states and 10588 transitions. [2023-08-30 15:27:59,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 847 transitions, 10430 flow [2023-08-30 15:27:59,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 847 transitions, 10267 flow, removed 14 selfloop flow, removed 20 redundant places. [2023-08-30 15:27:59,706 INFO L231 Difference]: Finished difference. Result has 461 places, 337 transitions, 4642 flow [2023-08-30 15:27:59,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=4642, PETRI_PLACES=461, PETRI_TRANSITIONS=337} [2023-08-30 15:27:59,706 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 424 predicate places. [2023-08-30 15:27:59,706 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 337 transitions, 4642 flow [2023-08-30 15:27:59,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 85.05882352941177) internal successors, (5784), 68 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states 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 15:27:59,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:59,707 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2023-08-30 15:27:59,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-08-30 15:27:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-30 15:27:59,907 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:59,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash -950728230, now seen corresponding path program 11 times [2023-08-30 15:27:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:59,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105668090] [2023-08-30 15:27:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105668090] [2023-08-30 15:28:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105668090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281794397] [2023-08-30 15:28:00,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:28:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:00,652 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:00,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-30 15:28:01,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:28:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 15:28:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:01,420 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 15:28:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:01,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 15:28:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:01,503 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 15:28:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:01,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:02,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:02,286 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 29 treesize of output 30 [2023-08-30 15:28:02,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:02,291 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 81 treesize of output 75 [2023-08-30 15:28:02,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 54 [2023-08-30 15:28:02,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:28:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:02,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281794397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:02,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:02,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2023-08-30 15:28:02,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847071879] [2023-08-30 15:28:02,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:02,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 15:28:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:02,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 15:28:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4453, Unknown=14, NotChecked=0, Total=4692 [2023-08-30 15:28:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:28:04,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 337 transitions, 4642 flow. Second operand has 69 states, 69 states have (on average 78.07246376811594) internal successors, (5387), 69 states have internal predecessors, (5387), 0 states have call successors, (0), 0 states 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 15:28:04,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:04,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:28:04,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:11,050 INFO L130 PetriNetUnfolder]: 12315/22192 cut-off events. [2023-08-30 15:28:11,050 INFO L131 PetriNetUnfolder]: For 138354/139939 co-relation queries the response was YES. [2023-08-30 15:28:11,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180021 conditions, 22192 events. 12315/22192 cut-off events. For 138354/139939 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 179421 event pairs, 7296 based on Foata normal form. 1675/23797 useless extension candidates. Maximal degree in co-relation 179946. Up to 6656 conditions per place. [2023-08-30 15:28:11,262 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 564 selfloop transitions, 74 changer transitions 0/640 dead transitions. [2023-08-30 15:28:11,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 640 transitions, 9068 flow [2023-08-30 15:28:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:28:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:28:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2084 transitions. [2023-08-30 15:28:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374898785425101 [2023-08-30 15:28:11,264 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2084 transitions. [2023-08-30 15:28:11,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2084 transitions. [2023-08-30 15:28:11,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2084 transitions. [2023-08-30 15:28:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 83.36) internal successors, (2084), 25 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states 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 15:28:11,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:28:11,269 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:28:11,269 INFO L175 Difference]: Start difference. First operand has 461 places, 337 transitions, 4642 flow. Second operand 25 states and 2084 transitions. [2023-08-30 15:28:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 640 transitions, 9068 flow [2023-08-30 15:28:11,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 640 transitions, 8559 flow, removed 75 selfloop flow, removed 50 redundant places. [2023-08-30 15:28:11,855 INFO L231 Difference]: Finished difference. Result has 438 places, 341 transitions, 4411 flow [2023-08-30 15:28:11,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4411, PETRI_PLACES=438, PETRI_TRANSITIONS=341} [2023-08-30 15:28:11,856 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 401 predicate places. [2023-08-30 15:28:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 341 transitions, 4411 flow [2023-08-30 15:28:11,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 78.07246376811594) internal successors, (5387), 69 states have internal predecessors, (5387), 0 states have call successors, (0), 0 states 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 15:28:11,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:11,857 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:11,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-30 15:28:12,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:12,064 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:28:12,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1360110743, now seen corresponding path program 16 times [2023-08-30 15:28:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188421392] [2023-08-30 15:28:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188421392] [2023-08-30 15:28:12,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188421392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793126570] [2023-08-30 15:28:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:28:12,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:12,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:12,350 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:12,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-30 15:28:12,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:28:12,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 15:28:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:13,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793126570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:13,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2023-08-30 15:28:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850179056] [2023-08-30 15:28:13,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-30 15:28:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-30 15:28:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2170, Unknown=0, NotChecked=0, Total=2862 [2023-08-30 15:28:13,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:28:13,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 341 transitions, 4411 flow. Second operand has 54 states, 54 states have (on average 95.11111111111111) internal successors, (5136), 54 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states 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 15:28:13,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:13,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:28:13,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:18,123 INFO L130 PetriNetUnfolder]: 12416/22457 cut-off events. [2023-08-30 15:28:18,123 INFO L131 PetriNetUnfolder]: For 166890/167152 co-relation queries the response was YES. [2023-08-30 15:28:18,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181196 conditions, 22457 events. 12416/22457 cut-off events. For 166890/167152 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 182489 event pairs, 4433 based on Foata normal form. 638/23095 useless extension candidates. Maximal degree in co-relation 181119. Up to 10397 conditions per place. [2023-08-30 15:28:18,423 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 256 selfloop transitions, 20 changer transitions 638/918 dead transitions. [2023-08-30 15:28:18,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 918 transitions, 14098 flow [2023-08-30 15:28:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:28:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:28:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2362 transitions. [2023-08-30 15:28:18,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984480431848853 [2023-08-30 15:28:18,425 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2362 transitions. [2023-08-30 15:28:18,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2362 transitions. [2023-08-30 15:28:18,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:18,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2362 transitions. [2023-08-30 15:28:18,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.41666666666667) internal successors, (2362), 24 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states 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 15:28:18,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:28:18,429 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 247.0) internal successors, (6175), 25 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states 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 15:28:18,429 INFO L175 Difference]: Start difference. First operand has 438 places, 341 transitions, 4411 flow. Second operand 24 states and 2362 transitions. [2023-08-30 15:28:18,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 918 transitions, 14098 flow [2023-08-30 15:28:18,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 918 transitions, 13864 flow, removed 27 selfloop flow, removed 20 redundant places. [2023-08-30 15:28:18,845 INFO L231 Difference]: Finished difference. Result has 443 places, 243 transitions, 3184 flow [2023-08-30 15:28:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3184, PETRI_PLACES=443, PETRI_TRANSITIONS=243} [2023-08-30 15:28:18,845 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 406 predicate places. [2023-08-30 15:28:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 243 transitions, 3184 flow [2023-08-30 15:28:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 95.11111111111111) internal successors, (5136), 54 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states 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 15:28:18,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:18,846 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:18,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-08-30 15:28:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:19,046 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:28:19,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -950728229, now seen corresponding path program 10 times [2023-08-30 15:28:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922637721] [2023-08-30 15:28:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922637721] [2023-08-30 15:28:19,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922637721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024413181] [2023-08-30 15:28:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:28:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:19,775 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:19,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-30 15:28:20,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:28:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 15:28:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:20,587 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 15:28:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:20,644 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 15:28:20,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:20,685 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 15:28:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:20,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:21,341 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3910 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3910) c_~A~0.base) (+ c_~A~0.offset 36)) 4294967296)) is different from false [2023-08-30 15:28:21,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:21,410 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 27 treesize of output 28 [2023-08-30 15:28:21,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:21,415 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 141 treesize of output 129 [2023-08-30 15:28:21,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 16 [2023-08-30 15:28:21,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-08-30 15:28:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:21,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024413181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:21,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:21,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2023-08-30 15:28:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028172134] [2023-08-30 15:28:21,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 15:28:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 15:28:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4327, Unknown=11, NotChecked=132, Total=4692 [2023-08-30 15:28:21,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:28:21,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 243 transitions, 3184 flow. Second operand has 69 states, 69 states have (on average 78.07246376811594) internal successors, (5387), 69 states have internal predecessors, (5387), 0 states have call successors, (0), 0 states 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 15:28:21,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:21,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:28:21,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:26,667 INFO L130 PetriNetUnfolder]: 9181/16744 cut-off events. [2023-08-30 15:28:26,667 INFO L131 PetriNetUnfolder]: For 121481/122643 co-relation queries the response was YES. [2023-08-30 15:28:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148624 conditions, 16744 events. 9181/16744 cut-off events. For 121481/122643 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 132581 event pairs, 4276 based on Foata normal form. 1256/17944 useless extension candidates. Maximal degree in co-relation 148545. Up to 7261 conditions per place. [2023-08-30 15:28:26,823 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 457 selfloop transitions, 70 changer transitions 0/528 dead transitions. [2023-08-30 15:28:26,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 528 transitions, 7370 flow [2023-08-30 15:28:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:28:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:28:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2071 transitions. [2023-08-30 15:28:26,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2023-08-30 15:28:26,825 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2071 transitions. [2023-08-30 15:28:26,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2071 transitions. [2023-08-30 15:28:26,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:26,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2071 transitions. [2023-08-30 15:28:26,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 82.84) internal successors, (2071), 25 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states 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 15:28:26,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:28:26,830 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:28:26,830 INFO L175 Difference]: Start difference. First operand has 443 places, 243 transitions, 3184 flow. Second operand 25 states and 2071 transitions. [2023-08-30 15:28:26,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 528 transitions, 7370 flow [2023-08-30 15:28:28,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 528 transitions, 6862 flow, removed 55 selfloop flow, removed 24 redundant places. [2023-08-30 15:28:28,187 INFO L231 Difference]: Finished difference. Result has 367 places, 241 transitions, 2949 flow [2023-08-30 15:28:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2949, PETRI_PLACES=367, PETRI_TRANSITIONS=241} [2023-08-30 15:28:28,187 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 330 predicate places. [2023-08-30 15:28:28,187 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 241 transitions, 2949 flow [2023-08-30 15:28:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 78.07246376811594) internal successors, (5387), 69 states have internal predecessors, (5387), 0 states have call successors, (0), 0 states 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 15:28:28,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:28,188 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:28:28,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-08-30 15:28:28,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:28,388 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:28:28,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1427159238, now seen corresponding path program 9 times [2023-08-30 15:28:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011425511] [2023-08-30 15:28:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:28,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:29,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011425511] [2023-08-30 15:28:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011425511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406492300] [2023-08-30 15:28:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:28:29,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:29,115 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-30 15:28:29,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:28:29,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 15:28:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:30,043 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 13 treesize of output 9 [2023-08-30 15:28:30,089 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 15:28:30,090 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 27 treesize of output 26 [2023-08-30 15:28:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:30,133 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 18 treesize of output 20 [2023-08-30 15:28:30,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:30,176 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 18 treesize of output 20 [2023-08-30 15:28:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:30,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:30,793 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3982 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3982) c_~A~0.base) (+ c_~A~0.offset 32))))) is different from false [2023-08-30 15:28:30,798 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3981 (Array Int Int)) (v_ArrVal_3982 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3981) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3982) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-30 15:28:30,886 INFO L321 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-30 15:28:30,892 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 36 treesize of output 42 [2023-08-30 15:28:30,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:30,899 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 159 treesize of output 147 [2023-08-30 15:28:30,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2023-08-30 15:28:30,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 20 [2023-08-30 15:28:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-08-30 15:28:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406492300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:31,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:31,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 66 [2023-08-30 15:28:31,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975218997] [2023-08-30 15:28:31,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-30 15:28:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-30 15:28:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4059, Unknown=8, NotChecked=258, Total=4556 [2023-08-30 15:28:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:28:31,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 241 transitions, 2949 flow. Second operand has 68 states, 68 states have (on average 78.1029411764706) internal successors, (5311), 68 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states 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 15:28:31,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:31,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:28:31,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:36,276 INFO L130 PetriNetUnfolder]: 9111/16575 cut-off events. [2023-08-30 15:28:36,276 INFO L131 PetriNetUnfolder]: For 104980/105164 co-relation queries the response was YES. [2023-08-30 15:28:36,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143278 conditions, 16575 events. 9111/16575 cut-off events. For 104980/105164 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 131528 event pairs, 1085 based on Foata normal form. 498/17073 useless extension candidates. Maximal degree in co-relation 143206. Up to 3238 conditions per place. [2023-08-30 15:28:36,569 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 762 selfloop transitions, 25 changer transitions 0/791 dead transitions. [2023-08-30 15:28:36,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 791 transitions, 13136 flow [2023-08-30 15:28:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:28:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:28:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1887 transitions. [2023-08-30 15:28:36,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33215983101566626 [2023-08-30 15:28:36,570 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1887 transitions. [2023-08-30 15:28:36,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1887 transitions. [2023-08-30 15:28:36,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:36,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1887 transitions. [2023-08-30 15:28:36,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 82.04347826086956) internal successors, (1887), 23 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states 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 15:28:36,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:28:36,574 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states 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 15:28:36,574 INFO L175 Difference]: Start difference. First operand has 367 places, 241 transitions, 2949 flow. Second operand 23 states and 1887 transitions. [2023-08-30 15:28:36,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 791 transitions, 13136 flow [2023-08-30 15:28:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 791 transitions, 12522 flow, removed 12 selfloop flow, removed 26 redundant places. [2023-08-30 15:28:36,731 INFO L231 Difference]: Finished difference. Result has 363 places, 240 transitions, 2820 flow [2023-08-30 15:28:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2820, PETRI_PLACES=363, PETRI_TRANSITIONS=240} [2023-08-30 15:28:36,732 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 326 predicate places. [2023-08-30 15:28:36,732 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 240 transitions, 2820 flow [2023-08-30 15:28:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 78.1029411764706) internal successors, (5311), 68 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states 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 15:28:36,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:36,732 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2023-08-30 15:28:36,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-08-30 15:28:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-08-30 15:28:36,933 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:28:36,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2034983250, now seen corresponding path program 11 times [2023-08-30 15:28:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683072699] [2023-08-30 15:28:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683072699] [2023-08-30 15:28:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683072699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688040222] [2023-08-30 15:28:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:28:37,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:37,288 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:37,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-30 15:28:37,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:28:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:37,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:28:37,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688040222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:38,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2023-08-30 15:28:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912116816] [2023-08-30 15:28:38,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 15:28:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 15:28:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2023-08-30 15:28:38,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:28:38,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 240 transitions, 2820 flow. Second operand has 59 states, 59 states have (on average 95.0677966101695) internal successors, (5609), 59 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states 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 15:28:38,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:38,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:28:38,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:42,161 INFO L130 PetriNetUnfolder]: 8568/16006 cut-off events. [2023-08-30 15:28:42,161 INFO L131 PetriNetUnfolder]: For 61816/62934 co-relation queries the response was YES. [2023-08-30 15:28:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129588 conditions, 16006 events. 8568/16006 cut-off events. For 61816/62934 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 130859 event pairs, 3517 based on Foata normal form. 1480/17484 useless extension candidates. Maximal degree in co-relation 129518. Up to 5384 conditions per place. [2023-08-30 15:28:42,281 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 495 selfloop transitions, 105 changer transitions 207/808 dead transitions. [2023-08-30 15:28:42,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 808 transitions, 10713 flow [2023-08-30 15:28:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:28:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:28:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3623 transitions. [2023-08-30 15:28:42,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40744489428699954 [2023-08-30 15:28:42,284 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3623 transitions. [2023-08-30 15:28:42,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3623 transitions. [2023-08-30 15:28:42,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:42,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3623 transitions. [2023-08-30 15:28:42,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 100.63888888888889) internal successors, (3623), 36 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states 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 15:28:42,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:28:42,290 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:28:42,290 INFO L175 Difference]: Start difference. First operand has 363 places, 240 transitions, 2820 flow. Second operand 36 states and 3623 transitions. [2023-08-30 15:28:42,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 808 transitions, 10713 flow [2023-08-30 15:28:42,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 808 transitions, 10269 flow, removed 4 selfloop flow, removed 20 redundant places. [2023-08-30 15:28:42,747 INFO L231 Difference]: Finished difference. Result has 390 places, 255 transitions, 3317 flow [2023-08-30 15:28:42,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2623, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3317, PETRI_PLACES=390, PETRI_TRANSITIONS=255} [2023-08-30 15:28:42,747 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 353 predicate places. [2023-08-30 15:28:42,747 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 255 transitions, 3317 flow [2023-08-30 15:28:42,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 95.0677966101695) internal successors, (5609), 59 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states 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 15:28:42,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:42,748 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2023-08-30 15:28:42,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-30 15:28:42,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-08-30 15:28:42,948 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:28:42,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash -617388483, now seen corresponding path program 12 times [2023-08-30 15:28:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:42,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669146255] [2023-08-30 15:28:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:42,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669146255] [2023-08-30 15:28:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669146255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767381858] [2023-08-30 15:28:43,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:28:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:43,699 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:43,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-30 15:28:45,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:28:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:28:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 15:28:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:46,009 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 15:28:46,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:28:46,065 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 18 treesize of output 20 [2023-08-30 15:28:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:46,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:47,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:47,484 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 26 treesize of output 27 [2023-08-30 15:28:47,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:28:47,491 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 41 treesize of output 33 [2023-08-30 15:28:47,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2023-08-30 15:28:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767381858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:48,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:48,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 72 [2023-08-30 15:28:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740594055] [2023-08-30 15:28:48,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-08-30 15:28:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-08-30 15:28:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=4868, Unknown=0, NotChecked=0, Total=5402 [2023-08-30 15:28:54,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 247 [2023-08-30 15:28:54,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 255 transitions, 3317 flow. Second operand has 74 states, 74 states have (on average 84.05405405405405) internal successors, (6220), 74 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states 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 15:28:54,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:54,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 247 [2023-08-30 15:28:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:10,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:29:13,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:29:18,648 INFO L130 PetriNetUnfolder]: 12367/22319 cut-off events. [2023-08-30 15:29:18,648 INFO L131 PetriNetUnfolder]: For 116709/118186 co-relation queries the response was YES. [2023-08-30 15:29:18,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193108 conditions, 22319 events. 12367/22319 cut-off events. For 116709/118186 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 182243 event pairs, 5611 based on Foata normal form. 1668/23985 useless extension candidates. Maximal degree in co-relation 193026. Up to 5223 conditions per place. [2023-08-30 15:29:18,869 INFO L137 encePairwiseOnDemand]: 238/247 looper letters, 597 selfloop transitions, 274 changer transitions 117/989 dead transitions. [2023-08-30 15:29:18,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 989 transitions, 12987 flow [2023-08-30 15:29:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-30 15:29:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-30 15:29:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 11436 transitions. [2023-08-30 15:29:18,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507545086492455 [2023-08-30 15:29:18,875 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 11436 transitions. [2023-08-30 15:29:18,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 11436 transitions. [2023-08-30 15:29:18,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:18,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 11436 transitions. [2023-08-30 15:29:18,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 86.63636363636364) internal successors, (11436), 132 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states 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 15:29:18,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 247.0) internal successors, (32851), 133 states have internal predecessors, (32851), 0 states have call successors, (0), 0 states 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 15:29:18,899 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 247.0) internal successors, (32851), 133 states have internal predecessors, (32851), 0 states have call successors, (0), 0 states 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 15:29:18,899 INFO L175 Difference]: Start difference. First operand has 390 places, 255 transitions, 3317 flow. Second operand 132 states and 11436 transitions. [2023-08-30 15:29:18,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 989 transitions, 12987 flow [2023-08-30 15:29:20,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 989 transitions, 12940 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-30 15:29:20,161 INFO L231 Difference]: Finished difference. Result has 526 places, 340 transitions, 5134 flow [2023-08-30 15:29:20,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=5134, PETRI_PLACES=526, PETRI_TRANSITIONS=340} [2023-08-30 15:29:20,161 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 489 predicate places. [2023-08-30 15:29:20,161 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 340 transitions, 5134 flow [2023-08-30 15:29:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 84.05405405405405) internal successors, (6220), 74 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states 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 15:29:20,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:20,162 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:20,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-30 15:29:20,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-30 15:29:20,362 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:29:20,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1292260990, now seen corresponding path program 17 times [2023-08-30 15:29:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:20,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395473789] [2023-08-30 15:29:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:20,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:21,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395473789] [2023-08-30 15:29:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395473789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655001214] [2023-08-30 15:29:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:29:21,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:21,036 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:29:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-30 15:29:21,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:29:21,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 15:29:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:21,847 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 15:29:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:21,893 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 15:29:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:21,933 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 15:29:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:22,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:22,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:22,704 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 27 treesize of output 28 [2023-08-30 15:29:22,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:22,709 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 71 treesize of output 65 [2023-08-30 15:29:22,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 24 [2023-08-30 15:29:22,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 42 [2023-08-30 15:29:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655001214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:23,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:23,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2023-08-30 15:29:23,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595999869] [2023-08-30 15:29:23,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 15:29:23,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 15:29:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4449, Unknown=18, NotChecked=0, Total=4692 [2023-08-30 15:29:24,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:29:24,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 340 transitions, 5134 flow. Second operand has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states 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 15:29:24,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:24,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:29:24,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:31,116 INFO L130 PetriNetUnfolder]: 14409/25940 cut-off events. [2023-08-30 15:29:31,116 INFO L131 PetriNetUnfolder]: For 245286/245643 co-relation queries the response was YES. [2023-08-30 15:29:31,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232805 conditions, 25940 events. 14409/25940 cut-off events. For 245286/245643 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 217097 event pairs, 1562 based on Foata normal form. 789/26725 useless extension candidates. Maximal degree in co-relation 232706. Up to 4863 conditions per place. [2023-08-30 15:29:31,392 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 1377 selfloop transitions, 28 changer transitions 0/1411 dead transitions. [2023-08-30 15:29:31,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1411 transitions, 28919 flow [2023-08-30 15:29:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:29:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:29:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2052 transitions. [2023-08-30 15:29:31,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323076923076923 [2023-08-30 15:29:31,394 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2052 transitions. [2023-08-30 15:29:31,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2052 transitions. [2023-08-30 15:29:31,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:31,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2052 transitions. [2023-08-30 15:29:31,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 82.08) internal successors, (2052), 25 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 15:29:31,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:29:31,398 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:29:31,398 INFO L175 Difference]: Start difference. First operand has 526 places, 340 transitions, 5134 flow. Second operand 25 states and 2052 transitions. [2023-08-30 15:29:31,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1411 transitions, 28919 flow [2023-08-30 15:29:32,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1411 transitions, 26555 flow, removed 587 selfloop flow, removed 81 redundant places. [2023-08-30 15:29:32,041 INFO L231 Difference]: Finished difference. Result has 471 places, 342 transitions, 4629 flow [2023-08-30 15:29:32,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4629, PETRI_PLACES=471, PETRI_TRANSITIONS=342} [2023-08-30 15:29:32,042 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 434 predicate places. [2023-08-30 15:29:32,042 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 342 transitions, 4629 flow [2023-08-30 15:29:32,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states 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 15:29:32,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:32,042 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:32,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-08-30 15:29:32,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:32,243 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:29:32,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1292260989, now seen corresponding path program 10 times [2023-08-30 15:29:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:32,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48237076] [2023-08-30 15:29:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:32,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:32,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:32,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48237076] [2023-08-30 15:29:32,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48237076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:32,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040380736] [2023-08-30 15:29:32,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:29:32,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:32,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:32,918 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:29:32,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-30 15:29:33,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:29:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 15:29:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:33,759 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 15:29:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:33,800 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 15:29:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:33,841 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 15:29:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:34,499 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4253 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4253) c_~A~0.base) (+ c_~A~0.offset 36)) 4294967296))) is different from false [2023-08-30 15:29:34,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:34,572 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 29 treesize of output 30 [2023-08-30 15:29:34,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:34,578 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 159 treesize of output 147 [2023-08-30 15:29:34,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2023-08-30 15:29:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 20 [2023-08-30 15:29:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040380736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:34,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:34,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2023-08-30 15:29:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458120659] [2023-08-30 15:29:34,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 15:29:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 15:29:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4327, Unknown=11, NotChecked=132, Total=4692 [2023-08-30 15:29:35,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:29:35,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 342 transitions, 4629 flow. Second operand has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states 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 15:29:35,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:35,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:29:35,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:41,953 INFO L130 PetriNetUnfolder]: 13865/24964 cut-off events. [2023-08-30 15:29:41,953 INFO L131 PetriNetUnfolder]: For 192005/192348 co-relation queries the response was YES. [2023-08-30 15:29:42,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226564 conditions, 24964 events. 13865/24964 cut-off events. For 192005/192348 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 207212 event pairs, 1564 based on Foata normal form. 775/25735 useless extension candidates. Maximal degree in co-relation 226463. Up to 4859 conditions per place. [2023-08-30 15:29:42,238 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 1376 selfloop transitions, 28 changer transitions 0/1410 dead transitions. [2023-08-30 15:29:42,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1410 transitions, 26608 flow [2023-08-30 15:29:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:29:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:29:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2051 transitions. [2023-08-30 15:29:42,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33214574898785426 [2023-08-30 15:29:42,240 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2051 transitions. [2023-08-30 15:29:42,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2051 transitions. [2023-08-30 15:29:42,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:42,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2051 transitions. [2023-08-30 15:29:42,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states 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 15:29:42,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:29:42,351 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 247.0) internal successors, (6422), 26 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states 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 15:29:42,351 INFO L175 Difference]: Start difference. First operand has 471 places, 342 transitions, 4629 flow. Second operand 25 states and 2051 transitions. [2023-08-30 15:29:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1410 transitions, 26608 flow [2023-08-30 15:29:42,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1410 transitions, 26538 flow, removed 5 selfloop flow, removed 23 redundant places. [2023-08-30 15:29:42,966 INFO L231 Difference]: Finished difference. Result has 472 places, 341 transitions, 4599 flow [2023-08-30 15:29:42,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4599, PETRI_PLACES=472, PETRI_TRANSITIONS=341} [2023-08-30 15:29:42,967 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 435 predicate places. [2023-08-30 15:29:42,967 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 341 transitions, 4599 flow [2023-08-30 15:29:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 78.10144927536231) internal successors, (5389), 69 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states 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 15:29:42,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:42,967 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:42,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-30 15:29:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:43,168 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:29:43,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1405382566, now seen corresponding path program 11 times [2023-08-30 15:29:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108595660] [2023-08-30 15:29:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:43,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:43,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108595660] [2023-08-30 15:29:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108595660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777735048] [2023-08-30 15:29:43,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:29:43,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:43,496 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:29:43,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-30 15:29:43,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 15:29:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:43,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:29:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:44,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777735048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:44,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:44,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2023-08-30 15:29:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532796126] [2023-08-30 15:29:44,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 15:29:44,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 15:29:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2023-08-30 15:29:45,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:29:45,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 341 transitions, 4599 flow. Second operand has 59 states, 59 states have (on average 95.10169491525424) internal successors, (5611), 59 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states 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 15:29:45,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:45,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:29:45,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:29:50,443 INFO L130 PetriNetUnfolder]: 13393/24228 cut-off events. [2023-08-30 15:29:50,443 INFO L131 PetriNetUnfolder]: For 172224/172555 co-relation queries the response was YES. [2023-08-30 15:29:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217059 conditions, 24228 events. 13393/24228 cut-off events. For 172224/172555 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 198073 event pairs, 4292 based on Foata normal form. 727/24951 useless extension candidates. Maximal degree in co-relation 216959. Up to 9853 conditions per place. [2023-08-30 15:29:50,687 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 262 selfloop transitions, 21 changer transitions 1062/1349 dead transitions. [2023-08-30 15:29:50,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1349 transitions, 24962 flow [2023-08-30 15:29:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:29:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:29:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3559 transitions. [2023-08-30 15:29:50,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002474134053081 [2023-08-30 15:29:50,689 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3559 transitions. [2023-08-30 15:29:50,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3559 transitions. [2023-08-30 15:29:50,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:29:50,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3559 transitions. [2023-08-30 15:29:50,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 98.86111111111111) internal successors, (3559), 36 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states 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 15:29:50,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:29:50,695 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 247.0) internal successors, (9139), 37 states have internal predecessors, (9139), 0 states have call successors, (0), 0 states 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 15:29:50,695 INFO L175 Difference]: Start difference. First operand has 472 places, 341 transitions, 4599 flow. Second operand 36 states and 3559 transitions. [2023-08-30 15:29:50,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1349 transitions, 24962 flow [2023-08-30 15:29:51,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1349 transitions, 24883 flow, removed 0 selfloop flow, removed 23 redundant places. [2023-08-30 15:29:51,408 INFO L231 Difference]: Finished difference. Result has 496 places, 252 transitions, 3230 flow [2023-08-30 15:29:51,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3230, PETRI_PLACES=496, PETRI_TRANSITIONS=252} [2023-08-30 15:29:51,408 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 459 predicate places. [2023-08-30 15:29:51,408 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 252 transitions, 3230 flow [2023-08-30 15:29:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 95.10169491525424) internal successors, (5611), 59 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states 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 15:29:51,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:29:51,409 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2023-08-30 15:29:51,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-30 15:29:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:51,610 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:29:51,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:29:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -26946814, now seen corresponding path program 12 times [2023-08-30 15:29:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:29:51,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832730736] [2023-08-30 15:29:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:29:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:29:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832730736] [2023-08-30 15:29:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832730736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937115151] [2023-08-30 15:29:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:29:52,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:52,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:52,433 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:29:52,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-30 15:29:53,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:29:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:29:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 15:29:53,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:53,861 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 15:29:53,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:53,932 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 20 treesize of output 22 [2023-08-30 15:29:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:29:53,998 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 20 treesize of output 22 [2023-08-30 15:29:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:55,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:55,524 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 31 treesize of output 32 [2023-08-30 15:29:55,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:29:55,531 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 175 treesize of output 159 [2023-08-30 15:29:55,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 25 [2023-08-30 15:29:55,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 24 [2023-08-30 15:29:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937115151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:56,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-08-30 15:29:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724108120] [2023-08-30 15:29:56,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-08-30 15:29:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-08-30 15:29:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=5306, Unknown=2, NotChecked=0, Total=5852 [2023-08-30 15:30:05,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 247 [2023-08-30 15:30:05,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 252 transitions, 3230 flow. Second operand has 77 states, 77 states have (on average 69.05194805194805) internal successors, (5317), 77 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states 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 15:30:05,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:30:05,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 247 [2023-08-30 15:30:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:06,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 15:30:37,528 INFO L130 PetriNetUnfolder]: 16290/29814 cut-off events. [2023-08-30 15:30:37,529 INFO L131 PetriNetUnfolder]: For 213915/215807 co-relation queries the response was YES. [2023-08-30 15:30:37,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268295 conditions, 29814 events. 16290/29814 cut-off events. For 213915/215807 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 260193 event pairs, 4111 based on Foata normal form. 2878/32692 useless extension candidates. Maximal degree in co-relation 268183. Up to 6179 conditions per place. [2023-08-30 15:30:37,924 INFO L137 encePairwiseOnDemand]: 239/247 looper letters, 1559 selfloop transitions, 179 changer transitions 279/2018 dead transitions. [2023-08-30 15:30:37,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 2018 transitions, 29189 flow [2023-08-30 15:30:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-30 15:30:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-30 15:30:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6441 transitions. [2023-08-30 15:30:37,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067873303167421 [2023-08-30 15:30:37,928 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6441 transitions. [2023-08-30 15:30:37,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6441 transitions. [2023-08-30 15:30:37,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:30:37,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6441 transitions. [2023-08-30 15:30:37,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 75.7764705882353) internal successors, (6441), 85 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states 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 15:30:37,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 247.0) internal successors, (21242), 86 states have internal predecessors, (21242), 0 states have call successors, (0), 0 states 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 15:30:37,940 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 247.0) internal successors, (21242), 86 states have internal predecessors, (21242), 0 states have call successors, (0), 0 states 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 15:30:37,940 INFO L175 Difference]: Start difference. First operand has 496 places, 252 transitions, 3230 flow. Second operand 85 states and 6441 transitions. [2023-08-30 15:30:37,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 2018 transitions, 29189 flow [2023-08-30 15:30:43,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2018 transitions, 26437 flow, removed 984 selfloop flow, removed 48 redundant places. [2023-08-30 15:30:43,226 INFO L231 Difference]: Finished difference. Result has 458 places, 303 transitions, 4250 flow [2023-08-30 15:30:43,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=4250, PETRI_PLACES=458, PETRI_TRANSITIONS=303} [2023-08-30 15:30:43,226 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 421 predicate places. [2023-08-30 15:30:43,226 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 303 transitions, 4250 flow [2023-08-30 15:30:43,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 69.05194805194805) internal successors, (5317), 77 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states 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 15:30:43,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:43,227 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:43,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-30 15:30:43,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:43,427 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:30:43,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -26946813, now seen corresponding path program 11 times [2023-08-30 15:30:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:43,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658394559] [2023-08-30 15:30:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:30:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658394559] [2023-08-30 15:30:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658394559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997358748] [2023-08-30 15:30:44,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:30:44,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:44,235 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:30:44,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-30 15:30:44,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-30 15:30:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:30:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 15:30:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:30:45,118 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 15:30:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:45,160 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 15:30:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:30:45,200 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 15:30:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:30:45,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:30:46,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:30:46,065 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 27 treesize of output 28 [2023-08-30 15:30:46,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:30:46,069 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 71 treesize of output 65 [2023-08-30 15:30:46,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54 treesize of output 46 [2023-08-30 15:30:46,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-08-30 15:30:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:30:46,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997358748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:30:46,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:30:46,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2023-08-30 15:30:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478816777] [2023-08-30 15:30:46,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:30:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-08-30 15:30:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:30:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-08-30 15:30:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5287, Unknown=19, NotChecked=0, Total=5550 [2023-08-30 15:30:49,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-08-30 15:30:49,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 303 transitions, 4250 flow. Second operand has 75 states, 75 states have (on average 78.06666666666666) internal successors, (5855), 75 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states 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 15:30:49,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:30:49,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-08-30 15:30:49,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:30:56,473 INFO L130 PetriNetUnfolder]: 15998/29322 cut-off events. [2023-08-30 15:30:56,473 INFO L131 PetriNetUnfolder]: For 144945/146819 co-relation queries the response was YES. [2023-08-30 15:30:56,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257849 conditions, 29322 events. 15998/29322 cut-off events. For 144945/146819 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 253888 event pairs, 7158 based on Foata normal form. 2069/31389 useless extension candidates. Maximal degree in co-relation 257767. Up to 10203 conditions per place. [2023-08-30 15:30:56,788 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 512 selfloop transitions, 102 changer transitions 0/615 dead transitions. [2023-08-30 15:30:56,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 615 transitions, 8774 flow [2023-08-30 15:30:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:30:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:30:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2237 transitions. [2023-08-30 15:30:56,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33543259859049335 [2023-08-30 15:30:56,790 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2237 transitions. [2023-08-30 15:30:56,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2237 transitions. [2023-08-30 15:30:56,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:30:56,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2237 transitions. [2023-08-30 15:30:56,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 82.85185185185185) internal successors, (2237), 27 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states 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 15:30:56,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states 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 15:30:56,795 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 247.0) internal successors, (6916), 28 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states 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 15:30:56,795 INFO L175 Difference]: Start difference. First operand has 458 places, 303 transitions, 4250 flow. Second operand 27 states and 2237 transitions. [2023-08-30 15:30:56,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 615 transitions, 8774 flow [2023-08-30 15:30:58,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 615 transitions, 8390 flow, removed 39 selfloop flow, removed 31 redundant places. [2023-08-30 15:30:58,805 INFO L231 Difference]: Finished difference. Result has 453 places, 302 transitions, 4036 flow [2023-08-30 15:30:58,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4036, PETRI_PLACES=453, PETRI_TRANSITIONS=302} [2023-08-30 15:30:58,805 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 416 predicate places. [2023-08-30 15:30:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 302 transitions, 4036 flow [2023-08-30 15:30:58,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 78.06666666666666) internal successors, (5855), 75 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states 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 15:30:58,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:30:58,806 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2023-08-30 15:30:58,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-08-30 15:30:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:59,006 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:30:59,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:30:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2035855764, now seen corresponding path program 12 times [2023-08-30 15:30:59,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:30:59,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31900307] [2023-08-30 15:30:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:30:59,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:30:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:30:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:30:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:30:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31900307] [2023-08-30 15:30:59,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31900307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:30:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023484109] [2023-08-30 15:30:59,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:30:59,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:30:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:30:59,404 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:30:59,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-30 15:31:00,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:31:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:31:00,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:31:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:31:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:31:00,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:31:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:31:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023484109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:31:00,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:31:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 62 [2023-08-30 15:31:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762339219] [2023-08-30 15:31:00,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:31:00,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-08-30 15:31:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:31:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-08-30 15:31:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=961, Invalid=3071, Unknown=0, NotChecked=0, Total=4032 [2023-08-30 15:31:01,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 247 [2023-08-30 15:31:01,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 302 transitions, 4036 flow. Second operand has 64 states, 64 states have (on average 95.109375) internal successors, (6087), 64 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states 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 15:31:01,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:31:01,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 247 [2023-08-30 15:31:01,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:31:06,779 INFO L130 PetriNetUnfolder]: 13730/25626 cut-off events. [2023-08-30 15:31:06,779 INFO L131 PetriNetUnfolder]: For 108689/110360 co-relation queries the response was YES. [2023-08-30 15:31:07,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216658 conditions, 25626 events. 13730/25626 cut-off events. For 108689/110360 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 222875 event pairs, 6047 based on Foata normal form. 1917/27543 useless extension candidates. Maximal degree in co-relation 216579. Up to 11331 conditions per place. [2023-08-30 15:31:07,161 INFO L137 encePairwiseOnDemand]: 240/247 looper letters, 571 selfloop transitions, 128 changer transitions 225/925 dead transitions. [2023-08-30 15:31:07,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 925 transitions, 12606 flow [2023-08-30 15:31:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 15:31:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 15:31:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3923 transitions. [2023-08-30 15:31:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40724592546454896 [2023-08-30 15:31:07,164 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3923 transitions. [2023-08-30 15:31:07,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3923 transitions. [2023-08-30 15:31:07,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:31:07,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3923 transitions. [2023-08-30 15:31:07,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 100.58974358974359) internal successors, (3923), 39 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states 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 15:31:07,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 247.0) internal successors, (9880), 40 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states 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 15:31:07,170 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 247.0) internal successors, (9880), 40 states have internal predecessors, (9880), 0 states have call successors, (0), 0 states 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 15:31:07,170 INFO L175 Difference]: Start difference. First operand has 453 places, 302 transitions, 4036 flow. Second operand 39 states and 3923 transitions. [2023-08-30 15:31:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 925 transitions, 12606 flow [2023-08-30 15:31:08,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 925 transitions, 12390 flow, removed 4 selfloop flow, removed 26 redundant places. [2023-08-30 15:31:08,271 INFO L231 Difference]: Finished difference. Result has 467 places, 299 transitions, 4072 flow [2023-08-30 15:31:08,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4072, PETRI_PLACES=467, PETRI_TRANSITIONS=299} [2023-08-30 15:31:08,271 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 430 predicate places. [2023-08-30 15:31:08,271 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 299 transitions, 4072 flow [2023-08-30 15:31:08,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 95.109375) internal successors, (6087), 64 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states 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 15:31:08,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:31:08,272 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:31:08,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-08-30 15:31:08,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:31:08,476 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:31:08,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:31:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 875955844, now seen corresponding path program 18 times [2023-08-30 15:31:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:31:08,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994294338] [2023-08-30 15:31:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:31:08,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:31:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:31:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:31:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:31:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994294338] [2023-08-30 15:31:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994294338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:31:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59002531] [2023-08-30 15:31:09,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:31:09,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:31:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:31:09,312 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:31:09,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-30 15:31:10,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 15:31:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:31:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 15:31:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:31:10,483 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 15:31:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:31:10,545 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 18 treesize of output 20 [2023-08-30 15:31:10,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:31:10,601 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 18 treesize of output 20 [2023-08-30 15:31:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:31:11,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:31:12,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:31:12,054 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 29 treesize of output 30 [2023-08-30 15:31:12,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:31:12,061 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 157 treesize of output 141 [2023-08-30 15:31:12,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 21 [2023-08-30 15:31:12,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 20 [2023-08-30 15:31:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:31:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59002531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:31:13,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:31:13,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-08-30 15:31:13,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246916832] [2023-08-30 15:31:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:31:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-08-30 15:31:13,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:31:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-08-30 15:31:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=5307, Unknown=1, NotChecked=0, Total=5852 Killed by 15