./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 07:21:04,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:21:04,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:21:05,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:21:05,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:21:05,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:21:05,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:21:05,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:21:05,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:21:05,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:21:05,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:21:05,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:21:05,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:21:05,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:21:05,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:21:05,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:21:05,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:21:05,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:21:05,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:21:05,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:21:05,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:21:05,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:21:05,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:21:05,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:21:05,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:21:05,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:21:05,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:21:05,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:21:05,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:21:05,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:21:05,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:21:05,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:21:05,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:21:05,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:21:05,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:21:05,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:21:05,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:21:05,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:21:05,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:21:05,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:21:05,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:21:05,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:21:05,112 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:21:05,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:21:05,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:21:05,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:21:05,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:21:05,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:21:05,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:21:05,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:21:05,115 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:21:05,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:21:05,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:21:05,117 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:21:05,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:21:05,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:21:05,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:21:05,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:21:05,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:21:05,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:21:05,118 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:21:05,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:21:05,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:21:05,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:21:05,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:21:05,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:21:05,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:21:05,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:21:05,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:21:05,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:21:05,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:21:05,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:21:05,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:21:05,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:21:05,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:21:05,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:21:05,121 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:21:05,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:21:05,122 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:21:05,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:21:05,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:21:05,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:21:05,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:21:05,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:21:05,448 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:21:05,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 07:21:06,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:21:06,867 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:21:06,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-09-01 07:21:06,883 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c1fe844/1d3fa70384754846a87e6b8af915ac78/FLAGd8f31f2fc [2023-09-01 07:21:06,900 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c1fe844/1d3fa70384754846a87e6b8af915ac78 [2023-09-01 07:21:06,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:21:06,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:21:06,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:21:06,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:21:06,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:21:06,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:21:06" (1/1) ... [2023-09-01 07:21:06,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680a9c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:06, skipping insertion in model container [2023-09-01 07:21:06,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:21:06" (1/1) ... [2023-09-01 07:21:06,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:21:06,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:21:07,148 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/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 07:21:07,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:21:07,172 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:21:07,212 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/chl-array-int-trans.wvr.c[2728,2741] [2023-09-01 07:21:07,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:21:07,241 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:21:07,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07 WrapperNode [2023-09-01 07:21:07,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:21:07,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:21:07,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:21:07,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:21:07,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,315 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 343 [2023-09-01 07:21:07,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:21:07,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:21:07,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:21:07,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:21:07,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,363 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:21:07,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:21:07,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:21:07,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:21:07,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (1/1) ... [2023-09-01 07:21:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:21:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:07,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 07:21:07,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 07:21:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:21:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:21:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:21:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:21:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 07:21:07,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 07:21:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 07:21:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 07:21:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 07:21:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 07:21:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:21:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:21:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:21:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:21:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:21:07,494 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 07:21:07,605 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:21:07,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:21:08,156 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:21:08,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:21:08,169 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 07:21:08,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:21:08 BoogieIcfgContainer [2023-09-01 07:21:08,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:21:08,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:21:08,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:21:08,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:21:08,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:21:06" (1/3) ... [2023-09-01 07:21:08,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773623ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:21:08, skipping insertion in model container [2023-09-01 07:21:08,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:21:07" (2/3) ... [2023-09-01 07:21:08,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773623ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:21:08, skipping insertion in model container [2023-09-01 07:21:08,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:21:08" (3/3) ... [2023-09-01 07:21:08,179 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-09-01 07:21:08,186 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:21:08,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:21:08,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 07:21:08,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:21:08,327 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 07:21:08,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 418 transitions, 860 flow [2023-09-01 07:21:08,545 INFO L130 PetriNetUnfolder]: 34/415 cut-off events. [2023-09-01 07:21:08,545 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 07:21:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 415 events. 34/415 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1009 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 317. Up to 3 conditions per place. [2023-09-01 07:21:08,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 418 transitions, 860 flow [2023-09-01 07:21:08,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 397 transitions, 809 flow [2023-09-01 07:21:08,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:21:08,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 397 transitions, 809 flow [2023-09-01 07:21:08,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 397 transitions, 809 flow [2023-09-01 07:21:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 397 transitions, 809 flow [2023-09-01 07:21:08,667 INFO L130 PetriNetUnfolder]: 33/397 cut-off events. [2023-09-01 07:21:08,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 07:21:08,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 397 events. 33/397 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 955 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 317. Up to 3 conditions per place. [2023-09-01 07:21:08,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 38184 [2023-09-01 07:21:25,426 INFO L134 LiptonReduction]: Checked pairs total: 51437 [2023-09-01 07:21:25,427 INFO L136 LiptonReduction]: Total number of compositions: 504 [2023-09-01 07:21:25,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 07:21:25,450 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;@3d9148c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:21:25,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2023-09-01 07:21:25,456 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 07:21:25,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:21:25,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:25,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 07:21:25,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:21:25,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 55444, now seen corresponding path program 1 times [2023-09-01 07:21:25,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:25,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428099812] [2023-09-01 07:21:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:25,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:25,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428099812] [2023-09-01 07:21:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428099812] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:25,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:25,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:21:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305249949] [2023-09-01 07:21:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:25,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:21:25,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 922 [2023-09-01 07:21:25,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:25,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:25,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 922 [2023-09-01 07:21:25,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:29,753 INFO L130 PetriNetUnfolder]: 25859/35997 cut-off events. [2023-09-01 07:21:29,754 INFO L131 PetriNetUnfolder]: For 1328/1328 co-relation queries the response was YES. [2023-09-01 07:21:29,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73173 conditions, 35997 events. 25859/35997 cut-off events. For 1328/1328 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 214824 event pairs, 22226 based on Foata normal form. 0/14469 useless extension candidates. Maximal degree in co-relation 34416. Up to 18003 conditions per place. [2023-09-01 07:21:29,987 INFO L137 encePairwiseOnDemand]: 904/922 looper letters, 115 selfloop transitions, 6 changer transitions 0/121 dead transitions. [2023-09-01 07:21:29,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 121 transitions, 514 flow [2023-09-01 07:21:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1288 transitions. [2023-09-01 07:21:30,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656543745480839 [2023-09-01 07:21:30,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1288 transitions. [2023-09-01 07:21:30,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1288 transitions. [2023-09-01 07:21:30,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:30,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1288 transitions. [2023-09-01 07:21:30,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 429.3333333333333) internal successors, (1288), 3 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:30,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:30,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:30,035 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 155 flow. Second operand 3 states and 1288 transitions. [2023-09-01 07:21:30,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 121 transitions, 514 flow [2023-09-01 07:21:30,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 121 transitions, 496 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 07:21:30,049 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 190 flow [2023-09-01 07:21:30,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-09-01 07:21:30,054 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2023-09-01 07:21:30,055 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 190 flow [2023-09-01 07:21:30,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:30,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:30,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 07:21:30,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:21:30,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:21:30,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1721417, now seen corresponding path program 1 times [2023-09-01 07:21:30,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:30,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573669870] [2023-09-01 07:21:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:30,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:30,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:30,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573669870] [2023-09-01 07:21:30,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573669870] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:21:30,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092516885] [2023-09-01 07:21:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:30,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:30,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:21:30,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 07:21:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 07:21:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:21:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:30,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:21:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092516885] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:21:30,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:21:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 07:21:30,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087115684] [2023-09-01 07:21:30,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:21:30,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 07:21:30,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 07:21:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:21:30,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 922 [2023-09-01 07:21:30,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 384.14285714285717) internal successors, (2689), 7 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:30,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:30,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 922 [2023-09-01 07:21:30,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:37,759 INFO L130 PetriNetUnfolder]: 64655/89991 cut-off events. [2023-09-01 07:21:37,760 INFO L131 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2023-09-01 07:21:37,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182074 conditions, 89991 events. 64655/89991 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 3343. Compared 595520 event pairs, 55565 based on Foata normal form. 0/36186 useless extension candidates. Maximal degree in co-relation 145575. Up to 18001 conditions per place. [2023-09-01 07:21:38,223 INFO L137 encePairwiseOnDemand]: 910/922 looper letters, 268 selfloop transitions, 33 changer transitions 0/301 dead transitions. [2023-09-01 07:21:38,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 301 transitions, 1340 flow [2023-09-01 07:21:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 07:21:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 07:21:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2991 transitions. [2023-09-01 07:21:38,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634335295940502 [2023-09-01 07:21:38,231 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2991 transitions. [2023-09-01 07:21:38,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2991 transitions. [2023-09-01 07:21:38,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:38,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2991 transitions. [2023-09-01 07:21:38,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 427.2857142857143) internal successors, (2991), 7 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:38,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 922.0) internal successors, (7376), 8 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:38,252 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 922.0) internal successors, (7376), 8 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:38,252 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 190 flow. Second operand 7 states and 2991 transitions. [2023-09-01 07:21:38,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 301 transitions, 1340 flow [2023-09-01 07:21:38,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 301 transitions, 1316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:21:38,261 INFO L231 Difference]: Finished difference. Result has 72 places, 93 transitions, 397 flow [2023-09-01 07:21:38,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=397, PETRI_PLACES=72, PETRI_TRANSITIONS=93} [2023-09-01 07:21:38,263 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2023-09-01 07:21:38,263 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 93 transitions, 397 flow [2023-09-01 07:21:38,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 384.14285714285717) internal successors, (2689), 7 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:38,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:38,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 07:21:38,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 07:21:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:38,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:21:38,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash 53365524, now seen corresponding path program 1 times [2023-09-01 07:21:38,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500346460] [2023-09-01 07:21:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500346460] [2023-09-01 07:21:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500346460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:21:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645949171] [2023-09-01 07:21:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:38,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:21:38,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 07:21:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 07:21:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:21:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:38,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:21:38,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645949171] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:38,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:21:38,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 07:21:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847485330] [2023-09-01 07:21:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:21:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:21:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:21:38,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 922 [2023-09-01 07:21:38,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 383.8) internal successors, (1919), 5 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:38,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:38,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 922 [2023-09-01 07:21:38,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:45,674 INFO L130 PetriNetUnfolder]: 64646/89979 cut-off events. [2023-09-01 07:21:45,674 INFO L131 PetriNetUnfolder]: For 745/745 co-relation queries the response was YES. [2023-09-01 07:21:45,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182077 conditions, 89979 events. 64646/89979 cut-off events. For 745/745 co-relation queries the response was YES. Maximal size of possible extension queue 3225. Compared 593292 event pairs, 55565 based on Foata normal form. 2/36187 useless extension candidates. Maximal degree in co-relation 109218. Up to 53985 conditions per place. [2023-09-01 07:21:46,058 INFO L137 encePairwiseOnDemand]: 913/922 looper letters, 170 selfloop transitions, 15 changer transitions 0/185 dead transitions. [2023-09-01 07:21:46,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 185 transitions, 906 flow [2023-09-01 07:21:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 07:21:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 07:21:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2096 transitions. [2023-09-01 07:21:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546637744034707 [2023-09-01 07:21:46,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2096 transitions. [2023-09-01 07:21:46,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2096 transitions. [2023-09-01 07:21:46,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:46,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2096 transitions. [2023-09-01 07:21:46,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 419.2) internal successors, (2096), 5 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:46,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 922.0) internal successors, (5532), 6 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:46,082 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 922.0) internal successors, (5532), 6 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:46,082 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 397 flow. Second operand 5 states and 2096 transitions. [2023-09-01 07:21:46,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 185 transitions, 906 flow [2023-09-01 07:21:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 185 transitions, 876 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:46,087 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 316 flow [2023-09-01 07:21:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2023-09-01 07:21:46,089 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-09-01 07:21:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 316 flow [2023-09-01 07:21:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 383.8) internal successors, (1919), 5 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:46,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:46,091 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 07:21:46,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 07:21:46,296 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,SelfDestructingSolverStorable2 [2023-09-01 07:21:46,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:21:46,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -255255115, now seen corresponding path program 2 times [2023-09-01 07:21:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:46,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957249308] [2023-09-01 07:21:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:46,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957249308] [2023-09-01 07:21:46,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957249308] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:21:46,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828497171] [2023-09-01 07:21:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:21:46,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:46,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:46,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:21:46,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 07:21:46,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 07:21:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:21:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:21:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:21:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 07:21:46,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:21:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828497171] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:46,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:21:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 07:21:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476076291] [2023-09-01 07:21:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 07:21:46,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 922 [2023-09-01 07:21:46,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 387.0) internal successors, (1161), 3 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:46,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:46,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 922 [2023-09-01 07:21:46,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:52,778 INFO L130 PetriNetUnfolder]: 64646/89978 cut-off events. [2023-09-01 07:21:52,778 INFO L131 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2023-09-01 07:21:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182069 conditions, 89978 events. 64646/89978 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 3484. Compared 597623 event pairs, 55565 based on Foata normal form. 1/36189 useless extension candidates. Maximal degree in co-relation 145561. Up to 89973 conditions per place. [2023-09-01 07:21:53,188 INFO L137 encePairwiseOnDemand]: 919/922 looper letters, 74 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2023-09-01 07:21:53,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 466 flow [2023-09-01 07:21:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1219 transitions. [2023-09-01 07:21:53,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44070860448300797 [2023-09-01 07:21:53,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1219 transitions. [2023-09-01 07:21:53,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1219 transitions. [2023-09-01 07:21:53,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:53,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1219 transitions. [2023-09-01 07:21:53,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 406.3333333333333) internal successors, (1219), 3 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:53,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:53,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:53,204 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 316 flow. Second operand 3 states and 1219 transitions. [2023-09-01 07:21:53,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 466 flow [2023-09-01 07:21:53,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 445 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 07:21:53,213 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 297 flow [2023-09-01 07:21:53,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-09-01 07:21:53,214 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2023-09-01 07:21:53,215 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 297 flow [2023-09-01 07:21:53,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 387.0) internal successors, (1161), 3 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:53,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:53,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 07:21:53,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 07:21:53,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:53,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:21:53,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash -173559524, now seen corresponding path program 1 times [2023-09-01 07:21:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:53,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464821637] [2023-09-01 07:21:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:53,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:53,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464821637] [2023-09-01 07:21:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464821637] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:53,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:21:53,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672692806] [2023-09-01 07:21:53,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:53,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:21:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:21:53,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 07:21:53,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 922 [2023-09-01 07:21:53,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 297 flow. Second operand has 4 states, 4 states have (on average 378.5) internal successors, (1514), 4 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:21:53,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:53,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 922 [2023-09-01 07:21:53,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:06,778 INFO L130 PetriNetUnfolder]: 134531/186536 cut-off events. [2023-09-01 07:22:06,778 INFO L131 PetriNetUnfolder]: For 1651/1651 co-relation queries the response was YES. [2023-09-01 07:22:07,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377342 conditions, 186536 events. 134531/186536 cut-off events. For 1651/1651 co-relation queries the response was YES. Maximal size of possible extension queue 6908. Compared 1332699 event pairs, 112931 based on Foata normal form. 0/75638 useless extension candidates. Maximal degree in co-relation 239963. Up to 85707 conditions per place. [2023-09-01 07:22:07,633 INFO L137 encePairwiseOnDemand]: 915/922 looper letters, 194 selfloop transitions, 6 changer transitions 0/200 dead transitions. [2023-09-01 07:22:07,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 200 transitions, 1029 flow [2023-09-01 07:22:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 07:22:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 07:22:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2059 transitions. [2023-09-01 07:22:07,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466377440347072 [2023-09-01 07:22:07,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2059 transitions. [2023-09-01 07:22:07,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2059 transitions. [2023-09-01 07:22:07,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:07,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2059 transitions. [2023-09-01 07:22:07,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 411.8) internal successors, (2059), 5 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:07,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 922.0) internal successors, (5532), 6 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:07,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 922.0) internal successors, (5532), 6 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:07,653 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 297 flow. Second operand 5 states and 2059 transitions. [2023-09-01 07:22:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 200 transitions, 1029 flow [2023-09-01 07:22:07,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 200 transitions, 1017 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:22:07,658 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 330 flow [2023-09-01 07:22:07,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2023-09-01 07:22:07,660 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-09-01 07:22:07,660 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 330 flow [2023-09-01 07:22:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 378.5) internal successors, (1514), 4 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:07,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:07,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:22:07,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 07:22:07,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:22:07,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1108307414, now seen corresponding path program 1 times [2023-09-01 07:22:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807314004] [2023-09-01 07:22:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807314004] [2023-09-01 07:22:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807314004] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281448191] [2023-09-01 07:22:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:07,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:07,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:22:07,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 07:22:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 07:22:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:22:07,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:22:07,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281448191] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:22:07,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:22:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-09-01 07:22:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692572914] [2023-09-01 07:22:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:22:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:22:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:22:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:22:07,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 922 [2023-09-01 07:22:08,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:08,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:08,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 922 [2023-09-01 07:22:08,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:20,248 INFO L130 PetriNetUnfolder]: 127729/177706 cut-off events. [2023-09-01 07:22:20,248 INFO L131 PetriNetUnfolder]: For 13793/13793 co-relation queries the response was YES. [2023-09-01 07:22:20,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362895 conditions, 177706 events. 127729/177706 cut-off events. For 13793/13793 co-relation queries the response was YES. Maximal size of possible extension queue 6725. Compared 1275561 event pairs, 109051 based on Foata normal form. 3718/78886 useless extension candidates. Maximal degree in co-relation 230334. Up to 177706 conditions per place. [2023-09-01 07:22:21,033 INFO L137 encePairwiseOnDemand]: 920/922 looper letters, 80 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-09-01 07:22:21,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 482 flow [2023-09-01 07:22:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:22:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:22:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1227 transitions. [2023-09-01 07:22:21,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436008676789588 [2023-09-01 07:22:21,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1227 transitions. [2023-09-01 07:22:21,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1227 transitions. [2023-09-01 07:22:21,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:21,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1227 transitions. [2023-09-01 07:22:21,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:21,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:21,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 922.0) internal successors, (3688), 4 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:21,045 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 330 flow. Second operand 3 states and 1227 transitions. [2023-09-01 07:22:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 482 flow [2023-09-01 07:22:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 474 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 07:22:21,052 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 314 flow [2023-09-01 07:22:21,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2023-09-01 07:22:21,053 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-09-01 07:22:21,053 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 314 flow [2023-09-01 07:22:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 391.3333333333333) internal successors, (1174), 3 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:21,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:21,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:22:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 07:22:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:21,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:22:21,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 758723248, now seen corresponding path program 1 times [2023-09-01 07:22:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:21,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480558821] [2023-09-01 07:22:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:21,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480558821] [2023-09-01 07:22:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480558821] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695994378] [2023-09-01 07:22:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:21,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:22:21,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 07:22:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 07:22:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:22:21,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:22:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695994378] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:22:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:22:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-09-01 07:22:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978936146] [2023-09-01 07:22:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:22:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:22:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:22:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:22:21,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 387 out of 922 [2023-09-01 07:22:21,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 388.75) internal successors, (1555), 4 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:21,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:21,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 387 of 922 [2023-09-01 07:22:21,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:32,623 INFO L130 PetriNetUnfolder]: 112997/157258 cut-off events. [2023-09-01 07:22:32,624 INFO L131 PetriNetUnfolder]: For 6140/6140 co-relation queries the response was YES. [2023-09-01 07:22:32,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318471 conditions, 157258 events. 112997/157258 cut-off events. For 6140/6140 co-relation queries the response was YES. Maximal size of possible extension queue 5942. Compared 1113517 event pairs, 95887 based on Foata normal form. 1550/68080 useless extension candidates. Maximal degree in co-relation 318456. Up to 157252 conditions per place. [2023-09-01 07:22:33,309 INFO L137 encePairwiseOnDemand]: 918/922 looper letters, 73 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2023-09-01 07:22:33,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 464 flow [2023-09-01 07:22:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 07:22:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 07:22:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1607 transitions. [2023-09-01 07:22:33,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43573752711496744 [2023-09-01 07:22:33,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1607 transitions. [2023-09-01 07:22:33,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1607 transitions. [2023-09-01 07:22:33,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:33,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1607 transitions. [2023-09-01 07:22:33,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 401.75) internal successors, (1607), 4 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:33,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 922.0) internal successors, (4610), 5 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:33,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 922.0) internal successors, (4610), 5 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:33,323 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 314 flow. Second operand 4 states and 1607 transitions. [2023-09-01 07:22:33,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 464 flow [2023-09-01 07:22:33,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:22:33,325 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 315 flow [2023-09-01 07:22:33,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-09-01 07:22:33,326 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2023-09-01 07:22:33,326 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 315 flow [2023-09-01 07:22:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 388.75) internal successors, (1555), 4 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-09-01 07:22:33,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 07:22:33,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:33,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:22:33,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1109071732, now seen corresponding path program 1 times [2023-09-01 07:22:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:33,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019994559] [2023-09-01 07:22:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019994559] [2023-09-01 07:22:33,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019994559] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720429916] [2023-09-01 07:22:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:33,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:22:33,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 07:22:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:33,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 07:22:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:33,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:22:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:33,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720429916] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:22:33,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:22:33,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 07:22:33,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191337175] [2023-09-01 07:22:33,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:22:33,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 07:22:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 07:22:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 07:22:34,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 922 [2023-09-01 07:22:34,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 315 flow. Second operand has 13 states, 13 states have (on average 384.15384615384613) internal successors, (4994), 13 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:22:34,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:34,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 922 [2023-09-01 07:22:34,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:58,610 INFO L130 PetriNetUnfolder]: 236267/328810 cut-off events. [2023-09-01 07:22:58,610 INFO L131 PetriNetUnfolder]: For 3188/3188 co-relation queries the response was YES. [2023-09-01 07:22:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665852 conditions, 328810 events. 236267/328810 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 8292. Compared 2434858 event pairs, 200491 based on Foata normal form. 24/139130 useless extension candidates. Maximal degree in co-relation 665837. Up to 42910 conditions per place. [2023-09-01 07:23:00,203 INFO L137 encePairwiseOnDemand]: 914/922 looper letters, 546 selfloop transitions, 53 changer transitions 0/599 dead transitions. [2023-09-01 07:23:00,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 599 transitions, 2745 flow [2023-09-01 07:23:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:23:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:23:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5205 transitions. [2023-09-01 07:23:00,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044468546637747 [2023-09-01 07:23:00,214 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5205 transitions. [2023-09-01 07:23:00,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5205 transitions. [2023-09-01 07:23:00,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:23:00,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5205 transitions. [2023-09-01 07:23:00,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 433.75) internal successors, (5205), 12 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:23:00,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 922.0) internal successors, (11986), 13 states have internal predecessors, (11986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:23:00,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 922.0) internal successors, (11986), 13 states have internal predecessors, (11986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:23:00,239 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 315 flow. Second operand 12 states and 5205 transitions. [2023-09-01 07:23:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 599 transitions, 2745 flow [2023-09-01 07:23:00,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 599 transitions, 2732 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:23:00,247 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 678 flow [2023-09-01 07:23:00,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=922, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=678, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2023-09-01 07:23:00,248 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2023-09-01 07:23:00,248 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 678 flow [2023-09-01 07:23:00,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 384.15384615384613) internal successors, (4994), 13 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:23:00,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:23:00,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:23:00,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 07:23:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:23:00,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 66 more)] === [2023-09-01 07:23:00,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:23:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 713143274, now seen corresponding path program 1 times [2023-09-01 07:23:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:23:00,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092862374] [2023-09-01 07:23:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:23:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:23:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:23:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:23:00,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:23:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092862374] [2023-09-01 07:23:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092862374] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:23:00,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:23:00,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 07:23:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431352978] [2023-09-01 07:23:00,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:23:00,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:23:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:23:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:23:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 07:23:00,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 922 [2023-09-01 07:23:00,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 678 flow. Second operand has 5 states, 5 states have (on average 375.6) internal successors, (1878), 5 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:23:00,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:23:00,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 922 [2023-09-01 07:23:00,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand