./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/goblint-regression/28-race_reach_51-mutexptr_racefree.i -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 f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 10:12:04,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:12:04,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:12:04,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:12:04,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:12:04,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:12:04,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:12:04,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:12:04,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:12:04,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:12:04,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:12:04,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:12:04,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:12:04,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:12:04,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:12:04,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:12:04,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:12:04,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:12:04,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:12:04,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:12:04,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:12:04,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:12:04,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:12:04,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:12:04,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:12:04,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:12:04,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:12:04,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:12:04,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:12:04,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:12:04,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:12:04,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:12:04,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:12:04,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:12:04,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:12:04,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:12:04,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:12:04,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:12:04,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:12:04,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:12:04,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:12:04,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:12:04,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:12:04,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:12:04,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:12:04,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:12:04,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:12:04,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:12:04,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:12:04,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:12:04,159 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:12:04,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:12:04,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:12:04,160 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:12:04,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:12:04,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:12:04,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:12:04,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:12:04,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:12:04,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:12:04,161 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:12:04,162 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:12:04,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:12:04,162 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:12:04,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:12:04,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:12:04,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:12:04,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:12:04,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:12:04,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:12:04,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:12:04,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:12:04,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:12:04,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:12:04,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:12:04,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:12:04,164 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:12:04,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:12:04,165 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:12:04,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:12:04,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:12:04,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:12:04,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:12:04,504 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:12:04,505 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:12:04,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-30 10:12:05,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:12:05,975 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:12:05,975 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-30 10:12:05,989 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bfc93a8a/ec8b1610cb8641ecb7733ad7e121a927/FLAG4599bf7a8 [2023-08-30 10:12:06,010 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bfc93a8a/ec8b1610cb8641ecb7733ad7e121a927 [2023-08-30 10:12:06,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:12:06,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:12:06,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:12:06,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:12:06,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:12:06,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23471261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06, skipping insertion in model container [2023-08-30 10:12:06,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:12:06,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:12:06,388 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2023-08-30 10:12:06,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:12:06,426 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:12:06,473 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2023-08-30 10:12:06,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:12:06,523 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:12:06,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06 WrapperNode [2023-08-30 10:12:06,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:12:06,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:12:06,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:12:06,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:12:06,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,571 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-08-30 10:12:06,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:12:06,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:12:06,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:12:06,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:12:06,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:12:06,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:12:06,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:12:06,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:12:06,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (1/1) ... [2023-08-30 10:12:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:12:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:06,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 10:12:06,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 10:12:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:12:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:12:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:12:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:12:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:12:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 10:12:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 10:12:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:12:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:12:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:12:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:12:06,692 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 10:12:06,824 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:12:06,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:12:07,167 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:12:07,175 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:12:07,175 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 10:12:07,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:12:07 BoogieIcfgContainer [2023-08-30 10:12:07,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:12:07,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:12:07,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:12:07,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:12:07,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:12:06" (1/3) ... [2023-08-30 10:12:07,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff8e4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:12:07, skipping insertion in model container [2023-08-30 10:12:07,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:12:06" (2/3) ... [2023-08-30 10:12:07,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff8e4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:12:07, skipping insertion in model container [2023-08-30 10:12:07,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:12:07" (3/3) ... [2023-08-30 10:12:07,184 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-08-30 10:12:07,193 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:12:07,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:12:07,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 10:12:07,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:12:07,291 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 10:12:07,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 138 transitions, 284 flow [2023-08-30 10:12:07,422 INFO L130 PetriNetUnfolder]: 17/173 cut-off events. [2023-08-30 10:12:07,423 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:12:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 173 events. 17/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-30 10:12:07,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 138 transitions, 284 flow [2023-08-30 10:12:07,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 135 transitions, 278 flow [2023-08-30 10:12:07,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:12:07,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 135 transitions, 278 flow [2023-08-30 10:12:07,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 135 transitions, 278 flow [2023-08-30 10:12:07,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 135 transitions, 278 flow [2023-08-30 10:12:07,501 INFO L130 PetriNetUnfolder]: 16/170 cut-off events. [2023-08-30 10:12:07,501 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:12:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 170 events. 16/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-30 10:12:07,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 3870 [2023-08-30 10:12:10,967 INFO L134 LiptonReduction]: Checked pairs total: 6689 [2023-08-30 10:12:10,968 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-30 10:12:10,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:12:10,982 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;@6b9bd855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:12:10,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 10:12:10,986 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-08-30 10:12:10,986 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:12:10,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:10,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:12:10,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:10,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 16081827, now seen corresponding path program 1 times [2023-08-30 10:12:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914898696] [2023-08-30 10:12:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914898696] [2023-08-30 10:12:11,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914898696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:11,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:11,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:12:11,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556813962] [2023-08-30 10:12:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:11,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:12:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:12:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:12:11,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 258 [2023-08-30 10:12:11,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:11,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 258 [2023-08-30 10:12:11,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:11,416 INFO L130 PetriNetUnfolder]: 104/248 cut-off events. [2023-08-30 10:12:11,416 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:12:11,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 248 events. 104/248 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 954 event pairs, 84 based on Foata normal form. 32/212 useless extension candidates. Maximal degree in co-relation 469. Up to 220 conditions per place. [2023-08-30 10:12:11,419 INFO L137 encePairwiseOnDemand]: 244/258 looper letters, 38 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 10:12:11,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 176 flow [2023-08-30 10:12:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-30 10:12:11,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400516795865633 [2023-08-30 10:12:11,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-30 10:12:11,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-30 10:12:11,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:11,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-30 10:12:11,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,448 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 90 flow. Second operand 3 states and 418 transitions. [2023-08-30 10:12:11,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 176 flow [2023-08-30 10:12:11,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:11,452 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 76 flow [2023-08-30 10:12:11,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-30 10:12:11,461 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-30 10:12:11,462 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 76 flow [2023-08-30 10:12:11,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:11,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:12:11,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:11,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1941281892, now seen corresponding path program 1 times [2023-08-30 10:12:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844636373] [2023-08-30 10:12:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:11,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:11,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844636373] [2023-08-30 10:12:11,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844636373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:11,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:11,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:12:11,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698347843] [2023-08-30 10:12:11,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:11,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 258 [2023-08-30 10:12:11,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:11,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 258 [2023-08-30 10:12:11,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:11,934 INFO L130 PetriNetUnfolder]: 100/272 cut-off events. [2023-08-30 10:12:11,934 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 10:12:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 272 events. 100/272 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1186 event pairs, 28 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 535. Up to 136 conditions per place. [2023-08-30 10:12:11,936 INFO L137 encePairwiseOnDemand]: 249/258 looper letters, 41 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-08-30 10:12:11,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 220 flow [2023-08-30 10:12:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:12:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:12:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-08-30 10:12:11,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500968992248062 [2023-08-30 10:12:11,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-08-30 10:12:11,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-08-30 10:12:11,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:11,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-08-30 10:12:11,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,946 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 76 flow. Second operand 4 states and 517 transitions. [2023-08-30 10:12:11,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 220 flow [2023-08-30 10:12:11,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:11,948 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 110 flow [2023-08-30 10:12:11,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-30 10:12:11,948 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-30 10:12:11,949 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 110 flow [2023-08-30 10:12:11,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:11,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:11,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:11,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 10:12:11,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:11,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:11,950 INFO L85 PathProgramCache]: Analyzing trace with hash -814777743, now seen corresponding path program 1 times [2023-08-30 10:12:11,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:11,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024470774] [2023-08-30 10:12:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:11,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:12,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024470774] [2023-08-30 10:12:12,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024470774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:12,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:12,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:12:12,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053842600] [2023-08-30 10:12:12,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:12,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:12:12,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:12,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:12:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:12:12,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 258 [2023-08-30 10:12:12,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:12,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 258 [2023-08-30 10:12:12,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:12,230 INFO L130 PetriNetUnfolder]: 92/264 cut-off events. [2023-08-30 10:12:12,230 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 10:12:12,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 264 events. 92/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1172 event pairs, 42 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 580. Up to 190 conditions per place. [2023-08-30 10:12:12,232 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 33 selfloop transitions, 5 changer transitions 4/46 dead transitions. [2023-08-30 10:12:12,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 233 flow [2023-08-30 10:12:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 10:12:12,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129198966408268 [2023-08-30 10:12:12,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 10:12:12,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 10:12:12,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:12,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 10:12:12,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,238 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 110 flow. Second operand 3 states and 397 transitions. [2023-08-30 10:12:12,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 233 flow [2023-08-30 10:12:12,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:12,241 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 152 flow [2023-08-30 10:12:12,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 10:12:12,242 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-08-30 10:12:12,242 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 152 flow [2023-08-30 10:12:12,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:12,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 10:12:12,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:12,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -814777761, now seen corresponding path program 1 times [2023-08-30 10:12:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078386818] [2023-08-30 10:12:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:12,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078386818] [2023-08-30 10:12:12,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078386818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:12,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:12,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:12:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130570147] [2023-08-30 10:12:12,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:12,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:12,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:12,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:12:12,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 258 [2023-08-30 10:12:12,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:12,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 258 [2023-08-30 10:12:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:12,745 INFO L130 PetriNetUnfolder]: 72/214 cut-off events. [2023-08-30 10:12:12,748 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-30 10:12:12,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 72/214 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 858 event pairs, 16 based on Foata normal form. 12/223 useless extension candidates. Maximal degree in co-relation 503. Up to 59 conditions per place. [2023-08-30 10:12:12,750 INFO L137 encePairwiseOnDemand]: 248/258 looper letters, 45 selfloop transitions, 11 changer transitions 14/74 dead transitions. [2023-08-30 10:12:12,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 407 flow [2023-08-30 10:12:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:12:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:12:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1079 transitions. [2023-08-30 10:12:12,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46468561584840656 [2023-08-30 10:12:12,754 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1079 transitions. [2023-08-30 10:12:12,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1079 transitions. [2023-08-30 10:12:12,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:12,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1079 transitions. [2023-08-30 10:12:12,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,763 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,764 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 152 flow. Second operand 9 states and 1079 transitions. [2023-08-30 10:12:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 407 flow [2023-08-30 10:12:12,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 383 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:12,770 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 138 flow [2023-08-30 10:12:12,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-30 10:12:12,772 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2023-08-30 10:12:12,772 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 138 flow [2023-08-30 10:12:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:12,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:12,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:12:12,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:12,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -242668297, now seen corresponding path program 1 times [2023-08-30 10:12:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704748292] [2023-08-30 10:12:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:12,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704748292] [2023-08-30 10:12:13,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704748292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714560356] [2023-08-30 10:12:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:13,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:13,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:13,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 10:12:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 10:12:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:13,206 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:13,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:13,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:13,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:12:13,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:13,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714560356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:13,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:13,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-08-30 10:12:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115716179] [2023-08-30 10:12:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:13,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 10:12:13,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-08-30 10:12:13,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:13,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:13,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-08-30 10:12:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:13,612 INFO L130 PetriNetUnfolder]: 56/164 cut-off events. [2023-08-30 10:12:13,612 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-08-30 10:12:13,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 164 events. 56/164 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 561 event pairs, 19 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 392. Up to 58 conditions per place. [2023-08-30 10:12:13,613 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 38 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-08-30 10:12:13,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 265 flow [2023-08-30 10:12:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2023-08-30 10:12:13,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2023-08-30 10:12:13,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2023-08-30 10:12:13,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2023-08-30 10:12:13,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:13,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2023-08-30 10:12:13,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:13,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:13,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:13,621 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 138 flow. Second operand 5 states and 606 transitions. [2023-08-30 10:12:13,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 265 flow [2023-08-30 10:12:13,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 247 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 10:12:13,624 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 126 flow [2023-08-30 10:12:13,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-30 10:12:13,627 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2023-08-30 10:12:13,627 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 126 flow [2023-08-30 10:12:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:13,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:13,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:13,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:13,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:13,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -242668279, now seen corresponding path program 1 times [2023-08-30 10:12:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442005501] [2023-08-30 10:12:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:14,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442005501] [2023-08-30 10:12:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442005501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098048713] [2023-08-30 10:12:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:14,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:14,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:14,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 10:12:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 10:12:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:14,308 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:14,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:14,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:14,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:14,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:14,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098048713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:14,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:14,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 10:12:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873116788] [2023-08-30 10:12:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:12:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:12:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:12:14,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 258 [2023-08-30 10:12:14,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:14,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:14,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 258 [2023-08-30 10:12:14,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:14,524 INFO L130 PetriNetUnfolder]: 56/164 cut-off events. [2023-08-30 10:12:14,525 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 10:12:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 164 events. 56/164 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 556 event pairs, 55 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 382. Up to 146 conditions per place. [2023-08-30 10:12:14,526 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 22 selfloop transitions, 1 changer transitions 4/30 dead transitions. [2023-08-30 10:12:14,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 172 flow [2023-08-30 10:12:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-30 10:12:14,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2023-08-30 10:12:14,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-30 10:12:14,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-30 10:12:14,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:14,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-30 10:12:14,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:14,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:14,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:14,531 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 126 flow. Second operand 3 states and 370 transitions. [2023-08-30 10:12:14,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 172 flow [2023-08-30 10:12:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 160 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 10:12:14,533 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 91 flow [2023-08-30 10:12:14,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-30 10:12:14,533 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-30 10:12:14,534 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 91 flow [2023-08-30 10:12:14,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:14,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:14,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:14,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 10:12:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 10:12:14,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:12:14,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 500908559, now seen corresponding path program 1 times [2023-08-30 10:12:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849671181] [2023-08-30 10:12:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:14,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849671181] [2023-08-30 10:12:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849671181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813368504] [2023-08-30 10:12:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:14,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:14,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 10:12:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:14,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:12:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:14,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813368504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:14,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:14,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:12:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266705407] [2023-08-30 10:12:14,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:12:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:12:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:12:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 258 [2023-08-30 10:12:15,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 91 flow. Second operand has 7 states, 7 states have (on average 123.71428571428571) internal successors, (866), 7 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:15,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:15,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 258 [2023-08-30 10:12:15,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:15,031 INFO L130 PetriNetUnfolder]: 9/34 cut-off events. [2023-08-30 10:12:15,032 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 10:12:15,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 34 events. 9/34 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 10/44 useless extension candidates. Maximal degree in co-relation 83. Up to 19 conditions per place. [2023-08-30 10:12:15,032 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2023-08-30 10:12:15,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 122 flow [2023-08-30 10:12:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:12:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:12:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-30 10:12:15,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48352713178294576 [2023-08-30 10:12:15,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-30 10:12:15,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-30 10:12:15,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:15,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-30 10:12:15,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:15,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:15,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:15,038 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 91 flow. Second operand 4 states and 499 transitions. [2023-08-30 10:12:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 122 flow [2023-08-30 10:12:15,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 104 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 10:12:15,039 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-30 10:12:15,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-30 10:12:15,040 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -12 predicate places. [2023-08-30 10:12:15,040 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-30 10:12:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.71428571428571) internal successors, (866), 7 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:15,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2023-08-30 10:12:15,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2023-08-30 10:12:15,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2023-08-30 10:12:15,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2023-08-30 10:12:15,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2023-08-30 10:12:15,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2023-08-30 10:12:15,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2023-08-30 10:12:15,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:15,253 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:15,254 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:12:15,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 138 transitions, 284 flow [2023-08-30 10:12:15,270 INFO L130 PetriNetUnfolder]: 17/173 cut-off events. [2023-08-30 10:12:15,271 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:12:15,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 173 events. 17/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-30 10:12:15,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 138 transitions, 284 flow [2023-08-30 10:12:15,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 129 transitions, 263 flow [2023-08-30 10:12:15,272 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:12:15,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 129 transitions, 263 flow [2023-08-30 10:12:15,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 129 transitions, 263 flow [2023-08-30 10:12:15,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 129 transitions, 263 flow [2023-08-30 10:12:15,284 INFO L130 PetriNetUnfolder]: 16/164 cut-off events. [2023-08-30 10:12:15,284 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:12:15,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 164 events. 16/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 387 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-30 10:12:15,287 INFO L119 LiptonReduction]: Number of co-enabled transitions 3870 [2023-08-30 10:12:18,206 INFO L134 LiptonReduction]: Checked pairs total: 6665 [2023-08-30 10:12:18,206 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-30 10:12:18,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:12:18,208 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;@6b9bd855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:12:18,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:12:18,211 INFO L130 PetriNetUnfolder]: 2/24 cut-off events. [2023-08-30 10:12:18,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:12:18,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:18,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 10:12:18,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:12:18,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1645778265, now seen corresponding path program 1 times [2023-08-30 10:12:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:18,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920566901] [2023-08-30 10:12:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:12:18,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:12:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:12:18,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:12:18,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:12:18,244 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:12:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 10:12:18,244 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:12:18,245 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:12:18,246 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:12:18,246 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 10:12:18,263 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 10:12:18,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,292 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-08-30 10:12:18,292 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:12:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-30 10:12:18,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,296 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:12:18,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:18,318 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-08-30 10:12:18,318 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:12:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-30 10:12:18,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 13072 [2023-08-30 10:12:21,736 INFO L134 LiptonReduction]: Checked pairs total: 28995 [2023-08-30 10:12:21,737 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-30 10:12:21,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:12:21,739 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;@6b9bd855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:12:21,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-30 10:12:21,741 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 10:12:21,741 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:12:21,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:21,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:12:21,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:21,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash 971857334, now seen corresponding path program 1 times [2023-08-30 10:12:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:21,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548626927] [2023-08-30 10:12:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:21,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548626927] [2023-08-30 10:12:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548626927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:21,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:12:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506933102] [2023-08-30 10:12:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:12:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:12:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:12:21,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 337 [2023-08-30 10:12:21,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:21,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:21,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 337 [2023-08-30 10:12:21,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:22,322 INFO L130 PetriNetUnfolder]: 4058/6814 cut-off events. [2023-08-30 10:12:22,322 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-08-30 10:12:22,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13394 conditions, 6814 events. 4058/6814 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46005 event pairs, 1898 based on Foata normal form. 848/5458 useless extension candidates. Maximal degree in co-relation 1539. Up to 6459 conditions per place. [2023-08-30 10:12:22,359 INFO L137 encePairwiseOnDemand]: 317/337 looper letters, 57 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 10:12:22,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 270 flow [2023-08-30 10:12:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-30 10:12:22,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479723046488625 [2023-08-30 10:12:22,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-30 10:12:22,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-30 10:12:22,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:22,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-30 10:12:22,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:22,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:22,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:22,368 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 152 flow. Second operand 3 states and 554 transitions. [2023-08-30 10:12:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 270 flow [2023-08-30 10:12:22,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:22,370 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 138 flow [2023-08-30 10:12:22,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-30 10:12:22,372 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 10:12:22,372 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 138 flow [2023-08-30 10:12:22,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:22,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 10:12:22,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:22,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1957709101, now seen corresponding path program 1 times [2023-08-30 10:12:22,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:22,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249636105] [2023-08-30 10:12:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249636105] [2023-08-30 10:12:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249636105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:12:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026795869] [2023-08-30 10:12:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:22,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-30 10:12:22,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:22,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:22,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-30 10:12:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:23,241 INFO L130 PetriNetUnfolder]: 4478/7904 cut-off events. [2023-08-30 10:12:23,242 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2023-08-30 10:12:23,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16301 conditions, 7904 events. 4478/7904 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 57402 event pairs, 1421 based on Foata normal form. 0/5963 useless extension candidates. Maximal degree in co-relation 16213. Up to 5550 conditions per place. [2023-08-30 10:12:23,298 INFO L137 encePairwiseOnDemand]: 322/337 looper letters, 81 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2023-08-30 10:12:23,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 430 flow [2023-08-30 10:12:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:12:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:12:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2023-08-30 10:12:23,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222551928783383 [2023-08-30 10:12:23,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2023-08-30 10:12:23,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2023-08-30 10:12:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:23,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2023-08-30 10:12:23,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:23,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:23,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:23,307 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 138 flow. Second operand 4 states and 704 transitions. [2023-08-30 10:12:23,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 430 flow [2023-08-30 10:12:23,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:12:23,311 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 224 flow [2023-08-30 10:12:23,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-30 10:12:23,312 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-08-30 10:12:23,313 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 224 flow [2023-08-30 10:12:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:23,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:23,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:12:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 10:12:23,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:23,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1493609657, now seen corresponding path program 1 times [2023-08-30 10:12:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107259916] [2023-08-30 10:12:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:12:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107259916] [2023-08-30 10:12:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107259916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:12:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271536935] [2023-08-30 10:12:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:23,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:12:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:12:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:12:23,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 337 [2023-08-30 10:12:23,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:23,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:23,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 337 [2023-08-30 10:12:23,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:23,978 INFO L130 PetriNetUnfolder]: 4150/7298 cut-off events. [2023-08-30 10:12:23,978 INFO L131 PetriNetUnfolder]: For 2404/2404 co-relation queries the response was YES. [2023-08-30 10:12:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18199 conditions, 7298 events. 4150/7298 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 52158 event pairs, 2068 based on Foata normal form. 0/6517 useless extension candidates. Maximal degree in co-relation 12025. Up to 5644 conditions per place. [2023-08-30 10:12:24,018 INFO L137 encePairwiseOnDemand]: 333/337 looper letters, 77 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-30 10:12:24,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 480 flow [2023-08-30 10:12:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 10:12:24,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533135509396637 [2023-08-30 10:12:24,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 10:12:24,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 10:12:24,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:24,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 10:12:24,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,025 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 224 flow. Second operand 3 states and 539 transitions. [2023-08-30 10:12:24,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 480 flow [2023-08-30 10:12:24,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:24,034 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 236 flow [2023-08-30 10:12:24,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-08-30 10:12:24,035 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-30 10:12:24,035 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 236 flow [2023-08-30 10:12:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:24,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:12:24,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 10:12:24,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:24,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1493609656, now seen corresponding path program 1 times [2023-08-30 10:12:24,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:24,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56690856] [2023-08-30 10:12:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:24,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:24,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56690856] [2023-08-30 10:12:24,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56690856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780698931] [2023-08-30 10:12:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:24,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:24,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:24,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:24,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 10:12:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:12:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:24,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780698931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:12:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088462302] [2023-08-30 10:12:24,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:24,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:12:24,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 337 [2023-08-30 10:12:24,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:24,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 337 [2023-08-30 10:12:24,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:24,892 INFO L130 PetriNetUnfolder]: 3822/6865 cut-off events. [2023-08-30 10:12:24,892 INFO L131 PetriNetUnfolder]: For 3626/3636 co-relation queries the response was YES. [2023-08-30 10:12:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17451 conditions, 6865 events. 3822/6865 cut-off events. For 3626/3636 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 49047 event pairs, 1900 based on Foata normal form. 178/6478 useless extension candidates. Maximal degree in co-relation 7710. Up to 6512 conditions per place. [2023-08-30 10:12:24,929 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 61 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-30 10:12:24,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 390 flow [2023-08-30 10:12:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:12:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:12:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 684 transitions. [2023-08-30 10:12:24,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074183976261127 [2023-08-30 10:12:24,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 684 transitions. [2023-08-30 10:12:24,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 684 transitions. [2023-08-30 10:12:24,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:24,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 684 transitions. [2023-08-30 10:12:24,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,937 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 236 flow. Second operand 4 states and 684 transitions. [2023-08-30 10:12:24,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 390 flow [2023-08-30 10:12:24,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:12:24,942 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 232 flow [2023-08-30 10:12:24,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-08-30 10:12:24,945 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 10:12:24,945 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 232 flow [2023-08-30 10:12:24,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:24,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:24,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:24,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:25,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:25,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:25,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1831339655, now seen corresponding path program 1 times [2023-08-30 10:12:25,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:25,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759019473] [2023-08-30 10:12:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:25,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:25,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759019473] [2023-08-30 10:12:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759019473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:25,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:25,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:12:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490728735] [2023-08-30 10:12:25,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:25,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:25,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:12:25,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 337 [2023-08-30 10:12:25,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:25,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:25,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 337 [2023-08-30 10:12:25,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:26,410 INFO L130 PetriNetUnfolder]: 4780/8615 cut-off events. [2023-08-30 10:12:26,411 INFO L131 PetriNetUnfolder]: For 3899/3911 co-relation queries the response was YES. [2023-08-30 10:12:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21505 conditions, 8615 events. 4780/8615 cut-off events. For 3899/3911 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 63663 event pairs, 692 based on Foata normal form. 91/8165 useless extension candidates. Maximal degree in co-relation 21399. Up to 3929 conditions per place. [2023-08-30 10:12:26,455 INFO L137 encePairwiseOnDemand]: 319/337 looper letters, 173 selfloop transitions, 35 changer transitions 0/216 dead transitions. [2023-08-30 10:12:26,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 216 transitions, 1156 flow [2023-08-30 10:12:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:12:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:12:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1533 transitions. [2023-08-30 10:12:26,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054401582591493 [2023-08-30 10:12:26,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1533 transitions. [2023-08-30 10:12:26,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1533 transitions. [2023-08-30 10:12:26,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:26,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1533 transitions. [2023-08-30 10:12:26,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.33333333333334) internal successors, (1533), 9 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:26,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:26,469 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:26,469 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 232 flow. Second operand 9 states and 1533 transitions. [2023-08-30 10:12:26,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 216 transitions, 1156 flow [2023-08-30 10:12:26,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 216 transitions, 1149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:26,478 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 529 flow [2023-08-30 10:12:26,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=529, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2023-08-30 10:12:26,480 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2023-08-30 10:12:26,480 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 529 flow [2023-08-30 10:12:26,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:26,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:26,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 10:12:26,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:26,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1831339676, now seen corresponding path program 1 times [2023-08-30 10:12:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209422847] [2023-08-30 10:12:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:26,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209422847] [2023-08-30 10:12:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209422847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:12:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350553922] [2023-08-30 10:12:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:12:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:12:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:12:26,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 337 [2023-08-30 10:12:26,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 529 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:26,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:26,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 337 [2023-08-30 10:12:26,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:27,428 INFO L130 PetriNetUnfolder]: 4987/9297 cut-off events. [2023-08-30 10:12:27,429 INFO L131 PetriNetUnfolder]: For 15738/15802 co-relation queries the response was YES. [2023-08-30 10:12:27,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28862 conditions, 9297 events. 4987/9297 cut-off events. For 15738/15802 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 72362 event pairs, 1644 based on Foata normal form. 329/9429 useless extension candidates. Maximal degree in co-relation 28750. Up to 5436 conditions per place. [2023-08-30 10:12:27,514 INFO L137 encePairwiseOnDemand]: 323/337 looper letters, 103 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2023-08-30 10:12:27,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 140 transitions, 1098 flow [2023-08-30 10:12:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:12:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:12:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-30 10:12:27,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380811078140455 [2023-08-30 10:12:27,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-30 10:12:27,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-30 10:12:27,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:27,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-30 10:12:27,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:27,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:27,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:27,521 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 529 flow. Second operand 3 states and 544 transitions. [2023-08-30 10:12:27,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 140 transitions, 1098 flow [2023-08-30 10:12:27,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 140 transitions, 1070 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:27,565 INFO L231 Difference]: Finished difference. Result has 81 places, 108 transitions, 841 flow [2023-08-30 10:12:27,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=841, PETRI_PLACES=81, PETRI_TRANSITIONS=108} [2023-08-30 10:12:27,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2023-08-30 10:12:27,566 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 108 transitions, 841 flow [2023-08-30 10:12:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:27,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:27,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 10:12:27,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:27,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2018904647, now seen corresponding path program 1 times [2023-08-30 10:12:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:27,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869778492] [2023-08-30 10:12:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:27,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:27,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869778492] [2023-08-30 10:12:27,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869778492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:27,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598023647] [2023-08-30 10:12:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:27,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:27,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 10:12:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 10:12:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:27,828 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:27,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:27,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:27,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:12:27,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:27,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598023647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:27,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:12:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885054660] [2023-08-30 10:12:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:12:28,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 337 [2023-08-30 10:12:28,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 108 transitions, 841 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:28,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:28,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 337 [2023-08-30 10:12:28,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:29,141 INFO L130 PetriNetUnfolder]: 4777/8872 cut-off events. [2023-08-30 10:12:29,141 INFO L131 PetriNetUnfolder]: For 21867/21980 co-relation queries the response was YES. [2023-08-30 10:12:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30540 conditions, 8872 events. 4777/8872 cut-off events. For 21867/21980 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 66836 event pairs, 1756 based on Foata normal form. 118/8827 useless extension candidates. Maximal degree in co-relation 30419. Up to 7524 conditions per place. [2023-08-30 10:12:29,204 INFO L137 encePairwiseOnDemand]: 328/337 looper letters, 144 selfloop transitions, 23 changer transitions 0/175 dead transitions. [2023-08-30 10:12:29,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 175 transitions, 1615 flow [2023-08-30 10:12:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:12:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:12:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-30 10:12:29,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486646884272997 [2023-08-30 10:12:29,207 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-30 10:12:29,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-30 10:12:29,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:29,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-30 10:12:29,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:29,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:29,213 INFO L175 Difference]: Start difference. First operand has 81 places, 108 transitions, 841 flow. Second operand 6 states and 984 transitions. [2023-08-30 10:12:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 175 transitions, 1615 flow [2023-08-30 10:12:29,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 175 transitions, 1523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:29,269 INFO L231 Difference]: Finished difference. Result has 85 places, 119 transitions, 967 flow [2023-08-30 10:12:29,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=967, PETRI_PLACES=85, PETRI_TRANSITIONS=119} [2023-08-30 10:12:29,270 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2023-08-30 10:12:29,270 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 119 transitions, 967 flow [2023-08-30 10:12:29,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:29,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:29,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:29,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:29,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 10:12:29,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:29,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2019106436, now seen corresponding path program 1 times [2023-08-30 10:12:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226090178] [2023-08-30 10:12:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226090178] [2023-08-30 10:12:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226090178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64185430] [2023-08-30 10:12:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:29,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 10:12:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 10:12:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:29,720 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:29,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:29,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:29,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:29,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64185430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 10:12:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756399225] [2023-08-30 10:12:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:29,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:12:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:12:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 10:12:29,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-30 10:12:29,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 119 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:29,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:29,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-30 10:12:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:30,715 INFO L130 PetriNetUnfolder]: 4786/9005 cut-off events. [2023-08-30 10:12:30,715 INFO L131 PetriNetUnfolder]: For 21700/21749 co-relation queries the response was YES. [2023-08-30 10:12:30,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31118 conditions, 9005 events. 4786/9005 cut-off events. For 21700/21749 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 69745 event pairs, 1711 based on Foata normal form. 40/8865 useless extension candidates. Maximal degree in co-relation 30995. Up to 4802 conditions per place. [2023-08-30 10:12:30,783 INFO L137 encePairwiseOnDemand]: 323/337 looper letters, 187 selfloop transitions, 48 changer transitions 0/243 dead transitions. [2023-08-30 10:12:30,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 243 transitions, 2272 flow [2023-08-30 10:12:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-08-30 10:12:30,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252225519287834 [2023-08-30 10:12:30,787 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-08-30 10:12:30,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-08-30 10:12:30,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:30,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-08-30 10:12:30,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:30,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:30,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:30,792 INFO L175 Difference]: Start difference. First operand has 85 places, 119 transitions, 967 flow. Second operand 5 states and 885 transitions. [2023-08-30 10:12:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 243 transitions, 2272 flow [2023-08-30 10:12:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 243 transitions, 2253 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:30,856 INFO L231 Difference]: Finished difference. Result has 89 places, 139 transitions, 1353 flow [2023-08-30 10:12:30,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1353, PETRI_PLACES=89, PETRI_TRANSITIONS=139} [2023-08-30 10:12:30,857 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2023-08-30 10:12:30,857 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 139 transitions, 1353 flow [2023-08-30 10:12:30,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:30,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:30,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:30,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 10:12:31,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 10:12:31,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:31,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1225110106, now seen corresponding path program 1 times [2023-08-30 10:12:31,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:31,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702054240] [2023-08-30 10:12:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:12:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702054240] [2023-08-30 10:12:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702054240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017306698] [2023-08-30 10:12:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:31,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:31,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:31,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 10:12:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 10:12:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:31,305 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:31,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:31,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:31,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:31,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:12:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:12:31,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:12:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017306698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:31,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:31,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:12:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563064584] [2023-08-30 10:12:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:31,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:12:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:12:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:12:32,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 337 [2023-08-30 10:12:32,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 139 transitions, 1353 flow. Second operand has 14 states, 14 states have (on average 149.57142857142858) internal successors, (2094), 14 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:32,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:32,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 337 [2023-08-30 10:12:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:33,705 INFO L130 PetriNetUnfolder]: 5748/10528 cut-off events. [2023-08-30 10:12:33,706 INFO L131 PetriNetUnfolder]: For 43308/43406 co-relation queries the response was YES. [2023-08-30 10:12:33,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40479 conditions, 10528 events. 5748/10528 cut-off events. For 43308/43406 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 80611 event pairs, 827 based on Foata normal form. 330/10647 useless extension candidates. Maximal degree in co-relation 40352. Up to 4590 conditions per place. [2023-08-30 10:12:33,781 INFO L137 encePairwiseOnDemand]: 318/337 looper letters, 341 selfloop transitions, 175 changer transitions 1/525 dead transitions. [2023-08-30 10:12:33,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 525 transitions, 5084 flow [2023-08-30 10:12:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 10:12:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 10:12:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3437 transitions. [2023-08-30 10:12:33,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4856577645895153 [2023-08-30 10:12:33,790 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3437 transitions. [2023-08-30 10:12:33,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3437 transitions. [2023-08-30 10:12:33,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:33,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3437 transitions. [2023-08-30 10:12:33,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.66666666666666) internal successors, (3437), 21 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:33,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:33,809 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:33,809 INFO L175 Difference]: Start difference. First operand has 89 places, 139 transitions, 1353 flow. Second operand 21 states and 3437 transitions. [2023-08-30 10:12:33,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 525 transitions, 5084 flow [2023-08-30 10:12:33,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 525 transitions, 5068 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:33,898 INFO L231 Difference]: Finished difference. Result has 122 places, 285 transitions, 3758 flow [2023-08-30 10:12:33,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3758, PETRI_PLACES=122, PETRI_TRANSITIONS=285} [2023-08-30 10:12:33,899 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2023-08-30 10:12:33,899 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 285 transitions, 3758 flow [2023-08-30 10:12:33,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 149.57142857142858) internal successors, (2094), 14 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:33,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:33,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:33,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:34,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:34,106 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:34,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1225110145, now seen corresponding path program 1 times [2023-08-30 10:12:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:34,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810936650] [2023-08-30 10:12:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810936650] [2023-08-30 10:12:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810936650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:34,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:12:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543720207] [2023-08-30 10:12:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:34,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 337 [2023-08-30 10:12:34,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 285 transitions, 3758 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:34,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:34,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 337 [2023-08-30 10:12:34,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:35,446 INFO L130 PetriNetUnfolder]: 5558/10156 cut-off events. [2023-08-30 10:12:35,446 INFO L131 PetriNetUnfolder]: For 62605/62767 co-relation queries the response was YES. [2023-08-30 10:12:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45495 conditions, 10156 events. 5558/10156 cut-off events. For 62605/62767 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 77300 event pairs, 1491 based on Foata normal form. 350/10279 useless extension candidates. Maximal degree in co-relation 45348. Up to 5733 conditions per place. [2023-08-30 10:12:35,520 INFO L137 encePairwiseOnDemand]: 322/337 looper letters, 256 selfloop transitions, 143 changer transitions 6/413 dead transitions. [2023-08-30 10:12:35,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 413 transitions, 5756 flow [2023-08-30 10:12:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 874 transitions. [2023-08-30 10:12:35,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186943620178042 [2023-08-30 10:12:35,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 874 transitions. [2023-08-30 10:12:35,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 874 transitions. [2023-08-30 10:12:35,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:35,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 874 transitions. [2023-08-30 10:12:35,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:35,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:35,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:35,529 INFO L175 Difference]: Start difference. First operand has 122 places, 285 transitions, 3758 flow. Second operand 5 states and 874 transitions. [2023-08-30 10:12:35,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 413 transitions, 5756 flow [2023-08-30 10:12:35,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 413 transitions, 5598 flow, removed 79 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:35,853 INFO L231 Difference]: Finished difference. Result has 130 places, 314 transitions, 4696 flow [2023-08-30 10:12:35,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4696, PETRI_PLACES=130, PETRI_TRANSITIONS=314} [2023-08-30 10:12:35,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2023-08-30 10:12:35,854 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 314 transitions, 4696 flow [2023-08-30 10:12:35,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:35,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:35,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:35,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 10:12:35,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:35,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1674151691, now seen corresponding path program 1 times [2023-08-30 10:12:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:35,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869313924] [2023-08-30 10:12:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:35,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:35,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869313924] [2023-08-30 10:12:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869313924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:35,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:35,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:12:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171657858] [2023-08-30 10:12:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 337 [2023-08-30 10:12:36,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 314 transitions, 4696 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:36,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 337 [2023-08-30 10:12:36,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:36,302 INFO L130 PetriNetUnfolder]: 473/1378 cut-off events. [2023-08-30 10:12:36,302 INFO L131 PetriNetUnfolder]: For 8441/8461 co-relation queries the response was YES. [2023-08-30 10:12:36,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 1378 events. 473/1378 cut-off events. For 8441/8461 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9258 event pairs, 84 based on Foata normal form. 186/1468 useless extension candidates. Maximal degree in co-relation 6147. Up to 1039 conditions per place. [2023-08-30 10:12:36,310 INFO L137 encePairwiseOnDemand]: 330/337 looper letters, 112 selfloop transitions, 7 changer transitions 10/137 dead transitions. [2023-08-30 10:12:36,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 137 transitions, 1890 flow [2023-08-30 10:12:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:12:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:12:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 662 transitions. [2023-08-30 10:12:36,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910979228486647 [2023-08-30 10:12:36,312 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 662 transitions. [2023-08-30 10:12:36,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 662 transitions. [2023-08-30 10:12:36,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:36,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 662 transitions. [2023-08-30 10:12:36,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,316 INFO L175 Difference]: Start difference. First operand has 130 places, 314 transitions, 4696 flow. Second operand 4 states and 662 transitions. [2023-08-30 10:12:36,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 137 transitions, 1890 flow [2023-08-30 10:12:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 1714 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-08-30 10:12:36,348 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 1204 flow [2023-08-30 10:12:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1204, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2023-08-30 10:12:36,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-08-30 10:12:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 1204 flow [2023-08-30 10:12:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 10:12:36,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:36,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1499555359, now seen corresponding path program 2 times [2023-08-30 10:12:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102217717] [2023-08-30 10:12:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:36,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102217717] [2023-08-30 10:12:36,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102217717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:36,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947316695] [2023-08-30 10:12:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:36,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:36,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:36,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 10:12:36,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 10:12:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:36,584 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:36,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:36,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:36,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:36,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947316695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:36,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:12:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071774185] [2023-08-30 10:12:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:36,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:12:36,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 337 [2023-08-30 10:12:36,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 1204 flow. Second operand has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:36,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:36,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 337 [2023-08-30 10:12:36,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:37,050 INFO L130 PetriNetUnfolder]: 461/1339 cut-off events. [2023-08-30 10:12:37,050 INFO L131 PetriNetUnfolder]: For 6730/6741 co-relation queries the response was YES. [2023-08-30 10:12:37,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5879 conditions, 1339 events. 461/1339 cut-off events. For 6730/6741 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8844 event pairs, 224 based on Foata normal form. 8/1248 useless extension candidates. Maximal degree in co-relation 5846. Up to 698 conditions per place. [2023-08-30 10:12:37,056 INFO L137 encePairwiseOnDemand]: 328/337 looper letters, 130 selfloop transitions, 32 changer transitions 6/176 dead transitions. [2023-08-30 10:12:37,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1915 flow [2023-08-30 10:12:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:12:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:12:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 983 transitions. [2023-08-30 10:12:37,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615232443125617 [2023-08-30 10:12:37,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 983 transitions. [2023-08-30 10:12:37,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 983 transitions. [2023-08-30 10:12:37,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:37,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 983 transitions. [2023-08-30 10:12:37,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,066 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 1204 flow. Second operand 6 states and 983 transitions. [2023-08-30 10:12:37,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1915 flow [2023-08-30 10:12:37,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 176 transitions, 1868 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 10:12:37,089 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1260 flow [2023-08-30 10:12:37,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1260, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2023-08-30 10:12:37,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2023-08-30 10:12:37,090 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1260 flow [2023-08-30 10:12:37,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:37,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:37,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:37,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:37,295 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:37,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1687848997, now seen corresponding path program 1 times [2023-08-30 10:12:37,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:37,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344530010] [2023-08-30 10:12:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:37,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344530010] [2023-08-30 10:12:37,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344530010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:37,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:37,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:12:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088241746] [2023-08-30 10:12:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:37,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 337 [2023-08-30 10:12:37,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1260 flow. Second operand has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:37,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 337 [2023-08-30 10:12:37,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:37,667 INFO L130 PetriNetUnfolder]: 466/1387 cut-off events. [2023-08-30 10:12:37,667 INFO L131 PetriNetUnfolder]: For 7981/7982 co-relation queries the response was YES. [2023-08-30 10:12:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6018 conditions, 1387 events. 466/1387 cut-off events. For 7981/7982 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9234 event pairs, 217 based on Foata normal form. 11/1303 useless extension candidates. Maximal degree in co-relation 5986. Up to 681 conditions per place. [2023-08-30 10:12:37,676 INFO L137 encePairwiseOnDemand]: 324/337 looper letters, 113 selfloop transitions, 35 changer transitions 2/158 dead transitions. [2023-08-30 10:12:37,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1899 flow [2023-08-30 10:12:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2023-08-30 10:12:37,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884272997032641 [2023-08-30 10:12:37,678 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2023-08-30 10:12:37,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2023-08-30 10:12:37,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:37,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2023-08-30 10:12:37,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,682 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,682 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1260 flow. Second operand 5 states and 823 transitions. [2023-08-30 10:12:37,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1899 flow [2023-08-30 10:12:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 158 transitions, 1859 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 10:12:37,704 INFO L231 Difference]: Finished difference. Result has 126 places, 124 transitions, 1521 flow [2023-08-30 10:12:37,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1521, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2023-08-30 10:12:37,704 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2023-08-30 10:12:37,704 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 1521 flow [2023-08-30 10:12:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:37,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:37,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:37,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 10:12:37,705 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:37,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1295458353, now seen corresponding path program 1 times [2023-08-30 10:12:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736209432] [2023-08-30 10:12:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736209432] [2023-08-30 10:12:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736209432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620564323] [2023-08-30 10:12:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:37,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:37,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:37,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:37,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 10:12:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:38,007 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:38,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:38,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:38,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:12:38,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:38,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:38,189 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int)) (v_ArrVal_490 Int)) (or (< |c_t_funThread1of2ForFork0_#t~post9| (+ v_ArrVal_490 1)) (< (select (select (store (store |c_#memory_int| |c_~#global~0.base| (store (select |c_#memory_int| |c_~#global~0.base|) |c_~#global~0.offset| v_ArrVal_490)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_492) |c_~#global~0.base|) |c_~#global~0.offset|) 2147483647))) is different from false [2023-08-30 10:12:38,198 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int)) (v_ArrVal_490 Int)) (let ((.cse0 (select |c_#memory_int| |c_~#global~0.base|))) (or (< (select .cse0 |c_~#global~0.offset|) (+ v_ArrVal_490 1)) (< (select (select (store (store |c_#memory_int| |c_~#global~0.base| (store .cse0 |c_~#global~0.offset| v_ArrVal_490)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_492) |c_~#global~0.base|) |c_~#global~0.offset|) 2147483647)))) is different from false [2023-08-30 10:12:38,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:12:38,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-08-30 10:12:38,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-08-30 10:12:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620564323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:38,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:38,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-30 10:12:38,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266501315] [2023-08-30 10:12:38,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:38,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 10:12:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 10:12:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=181, Unknown=2, NotChecked=58, Total=306 [2023-08-30 10:12:38,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 337 [2023-08-30 10:12:38,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 1521 flow. Second operand has 18 states, 18 states have (on average 120.83333333333333) internal successors, (2175), 18 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:38,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:38,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 337 [2023-08-30 10:12:38,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:38,974 INFO L130 PetriNetUnfolder]: 467/1395 cut-off events. [2023-08-30 10:12:38,974 INFO L131 PetriNetUnfolder]: For 8943/8947 co-relation queries the response was YES. [2023-08-30 10:12:38,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 1395 events. 467/1395 cut-off events. For 8943/8947 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9291 event pairs, 110 based on Foata normal form. 17/1309 useless extension candidates. Maximal degree in co-relation 6255. Up to 225 conditions per place. [2023-08-30 10:12:38,980 INFO L137 encePairwiseOnDemand]: 321/337 looper letters, 184 selfloop transitions, 65 changer transitions 16/273 dead transitions. [2023-08-30 10:12:38,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 273 transitions, 2969 flow [2023-08-30 10:12:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 10:12:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 10:12:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2319 transitions. [2023-08-30 10:12:38,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38229475766567755 [2023-08-30 10:12:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2319 transitions. [2023-08-30 10:12:38,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2319 transitions. [2023-08-30 10:12:38,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:38,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2319 transitions. [2023-08-30 10:12:38,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 128.83333333333334) internal successors, (2319), 18 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:38,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 337.0) internal successors, (6403), 19 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:38,994 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 337.0) internal successors, (6403), 19 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:38,994 INFO L175 Difference]: Start difference. First operand has 126 places, 124 transitions, 1521 flow. Second operand 18 states and 2319 transitions. [2023-08-30 10:12:38,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 273 transitions, 2969 flow [2023-08-30 10:12:39,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 273 transitions, 2923 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-08-30 10:12:39,025 INFO L231 Difference]: Finished difference. Result has 151 places, 137 transitions, 1845 flow [2023-08-30 10:12:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1845, PETRI_PLACES=151, PETRI_TRANSITIONS=137} [2023-08-30 10:12:39,025 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2023-08-30 10:12:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 137 transitions, 1845 flow [2023-08-30 10:12:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 120.83333333333333) internal successors, (2175), 18 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:39,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:39,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:39,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1295458341, now seen corresponding path program 2 times [2023-08-30 10:12:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:39,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247027034] [2023-08-30 10:12:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:39,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247027034] [2023-08-30 10:12:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247027034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947354291] [2023-08-30 10:12:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:39,430 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:39,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 10:12:39,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:39,542 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:39,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:39,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:39,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-08-30 10:12:39,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 10:12:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:39,742 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int)) (v_ArrVal_547 Int)) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| |c_~#global~0.base| (store (select |c_#memory_int| |c_~#global~0.base|) |c_~#global~0.offset| v_ArrVal_547)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_549) |c_~#global~0.base|) |c_~#global~0.offset|))) (< (+ v_ArrVal_547 1) |c_t_funThread1of2ForFork0_#t~post9|))) is different from false [2023-08-30 10:12:39,752 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int)) (v_ArrVal_547 Int)) (let ((.cse0 (select |c_#memory_int| |c_~#global~0.base|))) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| |c_~#global~0.base| (store .cse0 |c_~#global~0.offset| v_ArrVal_547)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_549) |c_~#global~0.base|) |c_~#global~0.offset|))) (< (+ v_ArrVal_547 1) (select .cse0 |c_~#global~0.offset|))))) is different from false [2023-08-30 10:12:39,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:12:39,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-08-30 10:12:39,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-30 10:12:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947354291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:39,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:39,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 10:12:39,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672362235] [2023-08-30 10:12:39,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:12:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:12:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=231, Unknown=2, NotChecked=66, Total=380 [2023-08-30 10:12:39,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 337 [2023-08-30 10:12:39,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 137 transitions, 1845 flow. Second operand has 20 states, 20 states have (on average 120.55) internal successors, (2411), 20 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:39,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:39,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 337 [2023-08-30 10:12:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:44,727 INFO L130 PetriNetUnfolder]: 443/1356 cut-off events. [2023-08-30 10:12:44,727 INFO L131 PetriNetUnfolder]: For 10262/10265 co-relation queries the response was YES. [2023-08-30 10:12:44,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6589 conditions, 1356 events. 443/1356 cut-off events. For 10262/10265 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9139 event pairs, 91 based on Foata normal form. 5/1256 useless extension candidates. Maximal degree in co-relation 6546. Up to 313 conditions per place. [2023-08-30 10:12:44,734 INFO L137 encePairwiseOnDemand]: 313/337 looper letters, 191 selfloop transitions, 89 changer transitions 5/293 dead transitions. [2023-08-30 10:12:44,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 293 transitions, 3323 flow [2023-08-30 10:12:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 10:12:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 10:12:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2699 transitions. [2023-08-30 10:12:44,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813762893881588 [2023-08-30 10:12:44,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2699 transitions. [2023-08-30 10:12:44,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2699 transitions. [2023-08-30 10:12:44,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:44,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2699 transitions. [2023-08-30 10:12:44,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 128.52380952380952) internal successors, (2699), 21 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:44,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:44,751 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:44,751 INFO L175 Difference]: Start difference. First operand has 151 places, 137 transitions, 1845 flow. Second operand 21 states and 2699 transitions. [2023-08-30 10:12:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 293 transitions, 3323 flow [2023-08-30 10:12:44,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 293 transitions, 3206 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-30 10:12:44,796 INFO L231 Difference]: Finished difference. Result has 169 places, 158 transitions, 2151 flow [2023-08-30 10:12:44,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2151, PETRI_PLACES=169, PETRI_TRANSITIONS=158} [2023-08-30 10:12:44,796 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2023-08-30 10:12:44,797 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 158 transitions, 2151 flow [2023-08-30 10:12:44,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.55) internal successors, (2411), 20 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:44,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:44,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:44,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:45,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 10:12:45,003 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:45,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1021498317, now seen corresponding path program 1 times [2023-08-30 10:12:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930429956] [2023-08-30 10:12:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930429956] [2023-08-30 10:12:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930429956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:45,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:12:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942055790] [2023-08-30 10:12:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:12:45,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 337 [2023-08-30 10:12:45,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 158 transitions, 2151 flow. Second operand has 6 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:45,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 337 [2023-08-30 10:12:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:45,606 INFO L130 PetriNetUnfolder]: 437/1345 cut-off events. [2023-08-30 10:12:45,606 INFO L131 PetriNetUnfolder]: For 10599/10607 co-relation queries the response was YES. [2023-08-30 10:12:45,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7029 conditions, 1345 events. 437/1345 cut-off events. For 10599/10607 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8935 event pairs, 142 based on Foata normal form. 15/1257 useless extension candidates. Maximal degree in co-relation 6985. Up to 376 conditions per place. [2023-08-30 10:12:45,617 INFO L137 encePairwiseOnDemand]: 322/337 looper letters, 136 selfloop transitions, 76 changer transitions 2/222 dead transitions. [2023-08-30 10:12:45,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 222 transitions, 2952 flow [2023-08-30 10:12:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:12:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:12:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1572 transitions. [2023-08-30 10:12:45,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664688427299703 [2023-08-30 10:12:45,619 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1572 transitions. [2023-08-30 10:12:45,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1572 transitions. [2023-08-30 10:12:45,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:45,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1572 transitions. [2023-08-30 10:12:45,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.2) internal successors, (1572), 10 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,625 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,625 INFO L175 Difference]: Start difference. First operand has 169 places, 158 transitions, 2151 flow. Second operand 10 states and 1572 transitions. [2023-08-30 10:12:45,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 222 transitions, 2952 flow [2023-08-30 10:12:45,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 222 transitions, 2804 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-08-30 10:12:45,681 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 2258 flow [2023-08-30 10:12:45,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2258, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2023-08-30 10:12:45,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2023-08-30 10:12:45,684 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 2258 flow [2023-08-30 10:12:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:45,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 10:12:45,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:45,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1021498255, now seen corresponding path program 1 times [2023-08-30 10:12:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:45,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081415999] [2023-08-30 10:12:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:45,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:45,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:45,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081415999] [2023-08-30 10:12:45,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081415999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:45,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:45,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:12:45,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627521870] [2023-08-30 10:12:45,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:45,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:12:45,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:12:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:12:45,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 337 [2023-08-30 10:12:45,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 2258 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:45,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:45,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 337 [2023-08-30 10:12:45,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:46,098 INFO L130 PetriNetUnfolder]: 428/1318 cut-off events. [2023-08-30 10:12:46,098 INFO L131 PetriNetUnfolder]: For 11299/11307 co-relation queries the response was YES. [2023-08-30 10:12:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6988 conditions, 1318 events. 428/1318 cut-off events. For 11299/11307 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8742 event pairs, 192 based on Foata normal form. 16/1233 useless extension candidates. Maximal degree in co-relation 6944. Up to 707 conditions per place. [2023-08-30 10:12:46,105 INFO L137 encePairwiseOnDemand]: 324/337 looper letters, 137 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2023-08-30 10:12:46,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 186 transitions, 2753 flow [2023-08-30 10:12:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-30 10:12:46,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485459940652819 [2023-08-30 10:12:46,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-30 10:12:46,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-30 10:12:46,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:46,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-30 10:12:46,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:46,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:46,110 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:46,110 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 2258 flow. Second operand 5 states and 818 transitions. [2023-08-30 10:12:46,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 186 transitions, 2753 flow [2023-08-30 10:12:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 186 transitions, 2581 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-30 10:12:46,165 INFO L231 Difference]: Finished difference. Result has 172 places, 162 transitions, 2269 flow [2023-08-30 10:12:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2269, PETRI_PLACES=172, PETRI_TRANSITIONS=162} [2023-08-30 10:12:46,166 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2023-08-30 10:12:46,166 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 162 transitions, 2269 flow [2023-08-30 10:12:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:46,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:46,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 10:12:46,166 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:46,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -222600483, now seen corresponding path program 2 times [2023-08-30 10:12:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262173941] [2023-08-30 10:12:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262173941] [2023-08-30 10:12:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262173941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075608577] [2023-08-30 10:12:46,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:46,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:46,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 10:12:46,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:46,478 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:46,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:46,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:46,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:12:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:12:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:46,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:46,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075608577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:46,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:46,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-08-30 10:12:46,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772868360] [2023-08-30 10:12:46,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:46,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:12:46,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:12:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:12:46,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 337 [2023-08-30 10:12:46,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 162 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:46,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:46,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 337 [2023-08-30 10:12:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:47,178 INFO L130 PetriNetUnfolder]: 428/1304 cut-off events. [2023-08-30 10:12:47,178 INFO L131 PetriNetUnfolder]: For 11110/11117 co-relation queries the response was YES. [2023-08-30 10:12:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7080 conditions, 1304 events. 428/1304 cut-off events. For 11110/11117 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8602 event pairs, 121 based on Foata normal form. 8/1211 useless extension candidates. Maximal degree in co-relation 7033. Up to 368 conditions per place. [2023-08-30 10:12:47,188 INFO L137 encePairwiseOnDemand]: 324/337 looper letters, 145 selfloop transitions, 69 changer transitions 0/222 dead transitions. [2023-08-30 10:12:47,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 222 transitions, 2992 flow [2023-08-30 10:12:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:12:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:12:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1555 transitions. [2023-08-30 10:12:47,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46142433234421365 [2023-08-30 10:12:47,190 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1555 transitions. [2023-08-30 10:12:47,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1555 transitions. [2023-08-30 10:12:47,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:47,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1555 transitions. [2023-08-30 10:12:47,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.5) internal successors, (1555), 10 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) [2023-08-30 10:12:47,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:47,195 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:47,195 INFO L175 Difference]: Start difference. First operand has 172 places, 162 transitions, 2269 flow. Second operand 10 states and 1555 transitions. [2023-08-30 10:12:47,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 222 transitions, 2992 flow [2023-08-30 10:12:47,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 222 transitions, 2905 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-30 10:12:47,251 INFO L231 Difference]: Finished difference. Result has 176 places, 161 transitions, 2306 flow [2023-08-30 10:12:47,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2306, PETRI_PLACES=176, PETRI_TRANSITIONS=161} [2023-08-30 10:12:47,252 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2023-08-30 10:12:47,252 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 161 transitions, 2306 flow [2023-08-30 10:12:47,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:47,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:47,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:47,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:47,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 10:12:47,457 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:47,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash -221050235, now seen corresponding path program 2 times [2023-08-30 10:12:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295391513] [2023-08-30 10:12:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:47,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295391513] [2023-08-30 10:12:47,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295391513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:47,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281713838] [2023-08-30 10:12:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:47,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:47,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 10:12:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:47,820 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:47,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:47,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-08-30 10:12:47,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 10:12:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:48,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:48,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281713838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:48,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:48,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-08-30 10:12:48,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795038008] [2023-08-30 10:12:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:48,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:12:48,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:12:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:12:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 337 [2023-08-30 10:12:48,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 161 transitions, 2306 flow. Second operand has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:48,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 337 [2023-08-30 10:12:48,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:48,517 INFO L130 PetriNetUnfolder]: 426/1311 cut-off events. [2023-08-30 10:12:48,517 INFO L131 PetriNetUnfolder]: For 11956/11963 co-relation queries the response was YES. [2023-08-30 10:12:48,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7305 conditions, 1311 events. 426/1311 cut-off events. For 11956/11963 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8655 event pairs, 134 based on Foata normal form. 7/1217 useless extension candidates. Maximal degree in co-relation 7258. Up to 368 conditions per place. [2023-08-30 10:12:48,524 INFO L137 encePairwiseOnDemand]: 324/337 looper letters, 147 selfloop transitions, 69 changer transitions 0/224 dead transitions. [2023-08-30 10:12:48,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 3113 flow [2023-08-30 10:12:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:12:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:12:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1425 transitions. [2023-08-30 10:12:48,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698318496538081 [2023-08-30 10:12:48,526 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1425 transitions. [2023-08-30 10:12:48,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1425 transitions. [2023-08-30 10:12:48,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:48,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1425 transitions. [2023-08-30 10:12:48,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.33333333333334) internal successors, (1425), 9 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,529 INFO L175 Difference]: Start difference. First operand has 176 places, 161 transitions, 2306 flow. Second operand 9 states and 1425 transitions. [2023-08-30 10:12:48,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 3113 flow [2023-08-30 10:12:48,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 224 transitions, 2933 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-30 10:12:48,566 INFO L231 Difference]: Finished difference. Result has 175 places, 162 transitions, 2323 flow [2023-08-30 10:12:48,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2323, PETRI_PLACES=175, PETRI_TRANSITIONS=162} [2023-08-30 10:12:48,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2023-08-30 10:12:48,567 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 162 transitions, 2323 flow [2023-08-30 10:12:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:48,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:48,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:48,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 10:12:48,773 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:48,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:48,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1263497563, now seen corresponding path program 1 times [2023-08-30 10:12:48,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:48,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347604000] [2023-08-30 10:12:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:48,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:48,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:48,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347604000] [2023-08-30 10:12:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347604000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331777066] [2023-08-30 10:12:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:48,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:48,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:48,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 10:12:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:12:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331777066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:12:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758966824] [2023-08-30 10:12:48,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:12:48,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:12:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:12:48,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 337 [2023-08-30 10:12:48,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 162 transitions, 2323 flow. Second operand has 7 states, 7 states have (on average 160.14285714285714) internal successors, (1121), 7 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:48,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:48,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 337 [2023-08-30 10:12:48,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:49,082 INFO L130 PetriNetUnfolder]: 121/400 cut-off events. [2023-08-30 10:12:49,082 INFO L131 PetriNetUnfolder]: For 4175/4175 co-relation queries the response was YES. [2023-08-30 10:12:49,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2544 conditions, 400 events. 121/400 cut-off events. For 4175/4175 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1910 event pairs, 8 based on Foata normal form. 8/408 useless extension candidates. Maximal degree in co-relation 2496. Up to 218 conditions per place. [2023-08-30 10:12:49,085 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 112 selfloop transitions, 4 changer transitions 10/132 dead transitions. [2023-08-30 10:12:49,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 132 transitions, 2063 flow [2023-08-30 10:12:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:12:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:12:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-08-30 10:12:49,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49792284866468844 [2023-08-30 10:12:49,086 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-08-30 10:12:49,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-08-30 10:12:49,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:49,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-08-30 10:12:49,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,089 INFO L175 Difference]: Start difference. First operand has 175 places, 162 transitions, 2323 flow. Second operand 5 states and 839 transitions. [2023-08-30 10:12:49,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 132 transitions, 2063 flow [2023-08-30 10:12:49,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 1556 flow, removed 23 selfloop flow, removed 38 redundant places. [2023-08-30 10:12:49,102 INFO L231 Difference]: Finished difference. Result has 107 places, 76 transitions, 755 flow [2023-08-30 10:12:49,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=755, PETRI_PLACES=107, PETRI_TRANSITIONS=76} [2023-08-30 10:12:49,103 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2023-08-30 10:12:49,103 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 76 transitions, 755 flow [2023-08-30 10:12:49,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.14285714285714) internal successors, (1121), 7 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:49,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:49,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 10:12:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 10:12:49,304 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:49,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1507837590, now seen corresponding path program 1 times [2023-08-30 10:12:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101292919] [2023-08-30 10:12:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:49,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:49,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101292919] [2023-08-30 10:12:49,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101292919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:49,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:49,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:12:49,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889903439] [2023-08-30 10:12:49,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:49,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:49,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:12:49,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 337 [2023-08-30 10:12:49,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 76 transitions, 755 flow. Second operand has 6 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:49,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 337 [2023-08-30 10:12:49,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:49,690 INFO L130 PetriNetUnfolder]: 113/381 cut-off events. [2023-08-30 10:12:49,690 INFO L131 PetriNetUnfolder]: For 2156/2156 co-relation queries the response was YES. [2023-08-30 10:12:49,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1908 conditions, 381 events. 113/381 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1916 event pairs, 51 based on Foata normal form. 3/384 useless extension candidates. Maximal degree in co-relation 1878. Up to 221 conditions per place. [2023-08-30 10:12:49,692 INFO L137 encePairwiseOnDemand]: 326/337 looper letters, 69 selfloop transitions, 22 changer transitions 3/100 dead transitions. [2023-08-30 10:12:49,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 100 transitions, 1147 flow [2023-08-30 10:12:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:12:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:12:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1505 transitions. [2023-08-30 10:12:49,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465875370919881 [2023-08-30 10:12:49,694 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1505 transitions. [2023-08-30 10:12:49,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1505 transitions. [2023-08-30 10:12:49,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:49,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1505 transitions. [2023-08-30 10:12:49,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.5) internal successors, (1505), 10 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,700 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,700 INFO L175 Difference]: Start difference. First operand has 107 places, 76 transitions, 755 flow. Second operand 10 states and 1505 transitions. [2023-08-30 10:12:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 100 transitions, 1147 flow [2023-08-30 10:12:49,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 100 transitions, 1101 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-30 10:12:49,708 INFO L231 Difference]: Finished difference. Result has 112 places, 79 transitions, 823 flow [2023-08-30 10:12:49,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=823, PETRI_PLACES=112, PETRI_TRANSITIONS=79} [2023-08-30 10:12:49,712 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2023-08-30 10:12:49,712 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 79 transitions, 823 flow [2023-08-30 10:12:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:49,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:49,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 10:12:49,712 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:49,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1563913239, now seen corresponding path program 1 times [2023-08-30 10:12:49,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:49,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440185799] [2023-08-30 10:12:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 10:12:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440185799] [2023-08-30 10:12:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440185799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:49,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:12:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:12:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389529436] [2023-08-30 10:12:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:12:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:12:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:12:49,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 337 [2023-08-30 10:12:49,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 79 transitions, 823 flow. Second operand has 6 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:49,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:49,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 337 [2023-08-30 10:12:49,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:50,085 INFO L130 PetriNetUnfolder]: 109/375 cut-off events. [2023-08-30 10:12:50,086 INFO L131 PetriNetUnfolder]: For 2090/2097 co-relation queries the response was YES. [2023-08-30 10:12:50,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 375 events. 109/375 cut-off events. For 2090/2097 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1892 event pairs, 61 based on Foata normal form. 3/378 useless extension candidates. Maximal degree in co-relation 1850. Up to 238 conditions per place. [2023-08-30 10:12:50,088 INFO L137 encePairwiseOnDemand]: 326/337 looper letters, 58 selfloop transitions, 20 changer transitions 10/94 dead transitions. [2023-08-30 10:12:50,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 94 transitions, 1102 flow [2023-08-30 10:12:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:12:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:12:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1500 transitions. [2023-08-30 10:12:50,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44510385756676557 [2023-08-30 10:12:50,091 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1500 transitions. [2023-08-30 10:12:50,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1500 transitions. [2023-08-30 10:12:50,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:50,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1500 transitions. [2023-08-30 10:12:50,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:50,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:50,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 337.0) internal successors, (3707), 11 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:50,095 INFO L175 Difference]: Start difference. First operand has 112 places, 79 transitions, 823 flow. Second operand 10 states and 1500 transitions. [2023-08-30 10:12:50,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 94 transitions, 1102 flow [2023-08-30 10:12:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 94 transitions, 1026 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-30 10:12:50,103 INFO L231 Difference]: Finished difference. Result has 120 places, 74 transitions, 742 flow [2023-08-30 10:12:50,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=742, PETRI_PLACES=120, PETRI_TRANSITIONS=74} [2023-08-30 10:12:50,105 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-08-30 10:12:50,106 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 74 transitions, 742 flow [2023-08-30 10:12:50,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:50,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:50,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 10:12:50,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:50,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1594842852, now seen corresponding path program 2 times [2023-08-30 10:12:50,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:50,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025263817] [2023-08-30 10:12:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:50,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:50,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025263817] [2023-08-30 10:12:50,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025263817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:50,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851598443] [2023-08-30 10:12:50,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:50,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:50,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:50,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 10:12:50,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:50,497 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:50,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:50,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:50,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 10:12:50,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-08-30 10:12:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:50,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:12:50,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:12:50,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-08-30 10:12:50,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-08-30 10:12:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:12:50,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851598443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:12:50,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:12:50,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-30 10:12:50,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748386639] [2023-08-30 10:12:50,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:12:50,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 10:12:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:50,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 10:12:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-08-30 10:12:51,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 337 [2023-08-30 10:12:51,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 74 transitions, 742 flow. Second operand has 22 states, 22 states have (on average 140.86363636363637) internal successors, (3099), 22 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:51,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:51,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 337 [2023-08-30 10:12:51,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:52,023 INFO L130 PetriNetUnfolder]: 102/353 cut-off events. [2023-08-30 10:12:52,023 INFO L131 PetriNetUnfolder]: For 1878/1878 co-relation queries the response was YES. [2023-08-30 10:12:52,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 353 events. 102/353 cut-off events. For 1878/1878 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1754 event pairs, 23 based on Foata normal form. 4/357 useless extension candidates. Maximal degree in co-relation 1693. Up to 63 conditions per place. [2023-08-30 10:12:52,025 INFO L137 encePairwiseOnDemand]: 325/337 looper letters, 34 selfloop transitions, 5 changer transitions 58/103 dead transitions. [2023-08-30 10:12:52,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 103 transitions, 1185 flow [2023-08-30 10:12:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 10:12:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 10:12:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1853 transitions. [2023-08-30 10:12:52,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229627938826752 [2023-08-30 10:12:52,028 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1853 transitions. [2023-08-30 10:12:52,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1853 transitions. [2023-08-30 10:12:52,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:52,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1853 transitions. [2023-08-30 10:12:52,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.53846153846155) internal successors, (1853), 13 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:52,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 337.0) internal successors, (4718), 14 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:52,034 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 337.0) internal successors, (4718), 14 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:52,034 INFO L175 Difference]: Start difference. First operand has 120 places, 74 transitions, 742 flow. Second operand 13 states and 1853 transitions. [2023-08-30 10:12:52,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 103 transitions, 1185 flow [2023-08-30 10:12:52,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 103 transitions, 1113 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-08-30 10:12:52,042 INFO L231 Difference]: Finished difference. Result has 118 places, 41 transitions, 345 flow [2023-08-30 10:12:52,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=345, PETRI_PLACES=118, PETRI_TRANSITIONS=41} [2023-08-30 10:12:52,043 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2023-08-30 10:12:52,043 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 41 transitions, 345 flow [2023-08-30 10:12:52,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 140.86363636363637) internal successors, (3099), 22 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:52,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:52,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:52,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 10:12:52,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:52,249 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:12:52,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2122821365, now seen corresponding path program 2 times [2023-08-30 10:12:52,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77218438] [2023-08-30 10:12:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:12:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:12:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77218438] [2023-08-30 10:12:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77218438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:12:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762382363] [2023-08-30 10:12:52,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:12:52,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:52,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:12:52,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:12:52,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 10:12:52,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:12:52,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:12:52,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 10:12:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:12:52,677 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:12:52,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:12:52,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:12:52,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-08-30 10:12:52,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 10:12:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:12:52,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:12:52,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762382363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:12:52,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:12:52,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 10:12:52,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828936079] [2023-08-30 10:12:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:12:52,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:12:52,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:12:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:12:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-30 10:12:53,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 337 [2023-08-30 10:12:53,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 41 transitions, 345 flow. Second operand has 8 states, 8 states have (on average 145.625) internal successors, (1165), 8 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:53,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:12:53,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 337 [2023-08-30 10:12:53,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:12:53,114 INFO L130 PetriNetUnfolder]: 31/133 cut-off events. [2023-08-30 10:12:53,114 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 10:12:53,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 133 events. 31/133 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 17 based on Foata normal form. 2/135 useless extension candidates. Maximal degree in co-relation 570. Up to 54 conditions per place. [2023-08-30 10:12:53,115 INFO L137 encePairwiseOnDemand]: 329/337 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2023-08-30 10:12:53,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 46 transitions, 443 flow [2023-08-30 10:12:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 10:12:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 10:12:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1173 transitions. [2023-08-30 10:12:53,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508902077151335 [2023-08-30 10:12:53,117 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1173 transitions. [2023-08-30 10:12:53,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1173 transitions. [2023-08-30 10:12:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:12:53,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1173 transitions. [2023-08-30 10:12:53,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.625) internal successors, (1173), 8 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:53,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 337.0) internal successors, (3033), 9 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:53,121 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 337.0) internal successors, (3033), 9 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:53,121 INFO L175 Difference]: Start difference. First operand has 118 places, 41 transitions, 345 flow. Second operand 8 states and 1173 transitions. [2023-08-30 10:12:53,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 46 transitions, 443 flow [2023-08-30 10:12:53,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 46 transitions, 367 flow, removed 7 selfloop flow, removed 23 redundant places. [2023-08-30 10:12:53,123 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-30 10:12:53,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-30 10:12:53,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2023-08-30 10:12:53,124 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-30 10:12:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.625) internal successors, (1165), 8 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:12:53,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 16 remaining) [2023-08-30 10:12:53,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 16 remaining) [2023-08-30 10:12:53,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 16 remaining) [2023-08-30 10:12:53,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 16 remaining) [2023-08-30 10:12:53,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 16 remaining) [2023-08-30 10:12:53,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 10:12:53,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:12:53,331 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:12:53,331 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:12:53,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,357 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-08-30 10:12:53,358 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:12:53,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-30 10:12:53,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:12:53,361 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-08-30 10:12:53,381 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-08-30 10:12:53,381 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:12:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-30 10:12:53,390 INFO L119 LiptonReduction]: Number of co-enabled transitions 13072 [2023-08-30 10:12:56,897 INFO L134 LiptonReduction]: Checked pairs total: 28992 [2023-08-30 10:12:56,898 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-30 10:12:56,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:12:56,900 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;@6b9bd855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:12:56,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:12:56,905 INFO L130 PetriNetUnfolder]: 10/62 cut-off events. [2023-08-30 10:12:56,905 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 10:12:56,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:12:56,905 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 10:12:56,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:12:56,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:12:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash -516363246, now seen corresponding path program 1 times [2023-08-30 10:12:56,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:12:56,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006521691] [2023-08-30 10:12:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:12:56,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:12:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:12:56,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:12:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:12:56,926 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:12:56,926 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:12:56,926 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:12:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 10:12:56,927 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:12:56,927 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:12:56,927 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:12:56,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 10:12:56,944 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 10:12:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:56,992 INFO L130 PetriNetUnfolder]: 50/444 cut-off events. [2023-08-30 10:12:56,992 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:12:56,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 444 events. 50/444 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1549 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-08-30 10:12:56,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:57,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:57,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:12:57,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:57,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:57,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 228 transitions, 486 flow [2023-08-30 10:12:57,045 INFO L130 PetriNetUnfolder]: 50/444 cut-off events. [2023-08-30 10:12:57,046 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:12:57,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 444 events. 50/444 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1549 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-08-30 10:12:57,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 25542 [2023-08-30 10:13:00,614 INFO L134 LiptonReduction]: Checked pairs total: 61067 [2023-08-30 10:13:00,614 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-30 10:13:00,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:13:00,615 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;@6b9bd855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:13:00,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 10:13:00,617 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 10:13:00,617 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:13:00,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:00,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:13:00,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:00,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1555917513, now seen corresponding path program 1 times [2023-08-30 10:13:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274310980] [2023-08-30 10:13:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274310980] [2023-08-30 10:13:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274310980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:00,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:13:00,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:13:00,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308037416] [2023-08-30 10:13:00,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:00,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:13:00,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:13:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:13:00,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 413 [2023-08-30 10:13:00,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 89 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:00,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:00,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 413 [2023-08-30 10:13:00,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:08,531 INFO L130 PetriNetUnfolder]: 104647/147266 cut-off events. [2023-08-30 10:13:08,531 INFO L131 PetriNetUnfolder]: For 2799/2799 co-relation queries the response was YES. [2023-08-30 10:13:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294328 conditions, 147266 events. 104647/147266 cut-off events. For 2799/2799 co-relation queries the response was YES. Maximal size of possible extension queue 4270. Compared 1079693 event pairs, 67893 based on Foata normal form. 14035/114245 useless extension candidates. Maximal degree in co-relation 20218. Up to 145193 conditions per place. [2023-08-30 10:13:09,140 INFO L137 encePairwiseOnDemand]: 388/413 looper letters, 75 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-30 10:13:09,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 354 flow [2023-08-30 10:13:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:13:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:13:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-08-30 10:13:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552865213882163 [2023-08-30 10:13:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-08-30 10:13:09,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-08-30 10:13:09,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:09,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-08-30 10:13:09,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:09,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:09,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:09,143 INFO L175 Difference]: Start difference. First operand has 73 places, 89 transitions, 208 flow. Second operand 3 states and 688 transitions. [2023-08-30 10:13:09,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 354 flow [2023-08-30 10:13:09,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:13:09,147 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 184 flow [2023-08-30 10:13:09,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-30 10:13:09,148 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 10:13:09,148 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 184 flow [2023-08-30 10:13:09,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:09,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:09,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:13:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 10:13:09,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:09,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 600784501, now seen corresponding path program 1 times [2023-08-30 10:13:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:09,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657332268] [2023-08-30 10:13:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657332268] [2023-08-30 10:13:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657332268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:09,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:13:09,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:13:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268942348] [2023-08-30 10:13:09,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:09,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:13:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:13:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:13:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 413 [2023-08-30 10:13:09,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:09,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:09,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 413 [2023-08-30 10:13:09,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:16,855 INFO L130 PetriNetUnfolder]: 100171/140098 cut-off events. [2023-08-30 10:13:16,855 INFO L131 PetriNetUnfolder]: For 9130/9130 co-relation queries the response was YES. [2023-08-30 10:13:17,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293739 conditions, 140098 events. 100171/140098 cut-off events. For 9130/9130 co-relation queries the response was YES. Maximal size of possible extension queue 4228. Compared 1007888 event pairs, 49363 based on Foata normal form. 0/99331 useless extension candidates. Maximal degree in co-relation 293645. Up to 137165 conditions per place. [2023-08-30 10:13:17,580 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 89 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2023-08-30 10:13:17,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 471 flow [2023-08-30 10:13:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:13:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:13:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 855 transitions. [2023-08-30 10:13:17,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175544794188862 [2023-08-30 10:13:17,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 855 transitions. [2023-08-30 10:13:17,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 855 transitions. [2023-08-30 10:13:17,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:17,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 855 transitions. [2023-08-30 10:13:17,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:17,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:17,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:17,584 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 184 flow. Second operand 4 states and 855 transitions. [2023-08-30 10:13:17,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 471 flow [2023-08-30 10:13:17,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:13:17,596 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 253 flow [2023-08-30 10:13:17,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-08-30 10:13:17,596 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-08-30 10:13:17,597 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 253 flow [2023-08-30 10:13:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:17,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:17,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:13:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 10:13:17,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:17,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1704906118, now seen corresponding path program 1 times [2023-08-30 10:13:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103939997] [2023-08-30 10:13:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:17,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:13:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103939997] [2023-08-30 10:13:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103939997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:17,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:13:17,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:13:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274782702] [2023-08-30 10:13:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:13:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:13:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:13:17,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 413 [2023-08-30 10:13:17,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:17,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:17,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 413 [2023-08-30 10:13:17,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:25,173 INFO L130 PetriNetUnfolder]: 91407/130973 cut-off events. [2023-08-30 10:13:25,173 INFO L131 PetriNetUnfolder]: For 28064/28069 co-relation queries the response was YES. [2023-08-30 10:13:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305021 conditions, 130973 events. 91407/130973 cut-off events. For 28064/28069 co-relation queries the response was YES. Maximal size of possible extension queue 3821. Compared 995556 event pairs, 25398 based on Foata normal form. 1/105770 useless extension candidates. Maximal degree in co-relation 187749. Up to 94243 conditions per place. [2023-08-30 10:13:25,776 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 109 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-30 10:13:25,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 121 transitions, 604 flow [2023-08-30 10:13:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:13:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:13:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-30 10:13:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504439063761097 [2023-08-30 10:13:25,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-30 10:13:25,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-30 10:13:25,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:25,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-30 10:13:25,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:25,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:25,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:25,779 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 253 flow. Second operand 3 states and 682 transitions. [2023-08-30 10:13:25,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 121 transitions, 604 flow [2023-08-30 10:13:25,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:13:25,820 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 265 flow [2023-08-30 10:13:25,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-08-30 10:13:25,820 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2023-08-30 10:13:25,820 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 265 flow [2023-08-30 10:13:25,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:25,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:25,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:13:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 10:13:25,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:25,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1704906117, now seen corresponding path program 1 times [2023-08-30 10:13:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555741951] [2023-08-30 10:13:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555741951] [2023-08-30 10:13:25,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555741951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:13:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791161144] [2023-08-30 10:13:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:25,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:13:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:13:25,847 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:13:25,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 10:13:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:13:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:13:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:25,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:13:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791161144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:25,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:13:25,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:13:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790154902] [2023-08-30 10:13:25,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:25,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:13:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:13:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:13:25,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 413 [2023-08-30 10:13:25,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:25,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:25,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 413 [2023-08-30 10:13:25,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:32,879 INFO L130 PetriNetUnfolder]: 82643/116777 cut-off events. [2023-08-30 10:13:32,879 INFO L131 PetriNetUnfolder]: For 53484/53523 co-relation queries the response was YES. [2023-08-30 10:13:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282475 conditions, 116777 events. 82643/116777 cut-off events. For 53484/53523 co-relation queries the response was YES. Maximal size of possible extension queue 3294. Compared 828721 event pairs, 55507 based on Foata normal form. 3214/99843 useless extension candidates. Maximal degree in co-relation 174100. Up to 115210 conditions per place. [2023-08-30 10:13:33,438 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-30 10:13:33,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 448 flow [2023-08-30 10:13:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:13:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:13:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2023-08-30 10:13:33,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145278450363197 [2023-08-30 10:13:33,440 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2023-08-30 10:13:33,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2023-08-30 10:13:33,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:33,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2023-08-30 10:13:33,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:33,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:33,442 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:33,442 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 265 flow. Second operand 4 states and 850 transitions. [2023-08-30 10:13:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 448 flow [2023-08-30 10:13:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:13:33,506 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 261 flow [2023-08-30 10:13:33,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-08-30 10:13:33,507 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-08-30 10:13:33,507 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 261 flow [2023-08-30 10:13:33,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:33,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:33,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:13:33,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 10:13:33,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 10:13:33,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:33,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash 328253923, now seen corresponding path program 1 times [2023-08-30 10:13:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110731796] [2023-08-30 10:13:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:33,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:33,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110731796] [2023-08-30 10:13:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110731796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:33,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:13:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:13:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990016360] [2023-08-30 10:13:33,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:33,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:13:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:13:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:13:33,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 413 [2023-08-30 10:13:33,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:33,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:33,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 413 [2023-08-30 10:13:33,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:43,040 INFO L130 PetriNetUnfolder]: 105094/153099 cut-off events. [2023-08-30 10:13:43,040 INFO L131 PetriNetUnfolder]: For 57408/57425 co-relation queries the response was YES. [2023-08-30 10:13:43,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370406 conditions, 153099 events. 105094/153099 cut-off events. For 57408/57425 co-relation queries the response was YES. Maximal size of possible extension queue 4178. Compared 1195684 event pairs, 45585 based on Foata normal form. 4/132759 useless extension candidates. Maximal degree in co-relation 370296. Up to 106212 conditions per place. [2023-08-30 10:13:43,856 INFO L137 encePairwiseOnDemand]: 395/413 looper letters, 107 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2023-08-30 10:13:43,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 134 transitions, 705 flow [2023-08-30 10:13:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:13:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:13:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-30 10:13:43,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512510088781275 [2023-08-30 10:13:43,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-30 10:13:43,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-30 10:13:43,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:43,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-30 10:13:43,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:43,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:43,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:43,860 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 261 flow. Second operand 3 states and 683 transitions. [2023-08-30 10:13:43,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 134 transitions, 705 flow [2023-08-30 10:13:43,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 701 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:13:43,953 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 437 flow [2023-08-30 10:13:43,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2023-08-30 10:13:43,954 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 12 predicate places. [2023-08-30 10:13:43,954 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 437 flow [2023-08-30 10:13:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:43,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:13:43,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:13:43,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 10:13:43,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:13:43,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:13:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 328253924, now seen corresponding path program 1 times [2023-08-30 10:13:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:13:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724297046] [2023-08-30 10:13:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:13:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:13:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:13:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:13:44,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:13:44,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724297046] [2023-08-30 10:13:44,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724297046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:13:44,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:13:44,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:13:44,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618830983] [2023-08-30 10:13:44,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:13:44,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:13:44,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:13:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:13:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:13:44,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 413 [2023-08-30 10:13:44,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 183.66666666666666) internal successors, (1102), 6 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:44,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:13:44,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 413 [2023-08-30 10:13:44,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:13:57,875 INFO L130 PetriNetUnfolder]: 142510/207373 cut-off events. [2023-08-30 10:13:57,875 INFO L131 PetriNetUnfolder]: For 203325/203376 co-relation queries the response was YES. [2023-08-30 10:13:58,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571242 conditions, 207373 events. 142510/207373 cut-off events. For 203325/203376 co-relation queries the response was YES. Maximal size of possible extension queue 5894. Compared 1676828 event pairs, 43771 based on Foata normal form. 8006/212645 useless extension candidates. Maximal degree in co-relation 571132. Up to 152085 conditions per place. [2023-08-30 10:13:59,317 INFO L137 encePairwiseOnDemand]: 392/413 looper letters, 273 selfloop transitions, 63 changer transitions 0/344 dead transitions. [2023-08-30 10:13:59,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 344 transitions, 2081 flow [2023-08-30 10:13:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:13:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:13:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1945 transitions. [2023-08-30 10:13:59,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232714554748453 [2023-08-30 10:13:59,320 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1945 transitions. [2023-08-30 10:13:59,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1945 transitions. [2023-08-30 10:13:59,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:13:59,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1945 transitions. [2023-08-30 10:13:59,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.11111111111111) internal successors, (1945), 9 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:59,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 413.0) internal successors, (4130), 10 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:59,325 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 413.0) internal successors, (4130), 10 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:13:59,325 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 437 flow. Second operand 9 states and 1945 transitions. [2023-08-30 10:13:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 344 transitions, 2081 flow [2023-08-30 10:14:00,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 344 transitions, 1985 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:14:00,024 INFO L231 Difference]: Finished difference. Result has 96 places, 149 transitions, 1023 flow [2023-08-30 10:14:00,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1023, PETRI_PLACES=96, PETRI_TRANSITIONS=149} [2023-08-30 10:14:00,025 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 23 predicate places. [2023-08-30 10:14:00,025 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 149 transitions, 1023 flow [2023-08-30 10:14:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.66666666666666) internal successors, (1102), 6 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:00,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:14:00,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:14:00,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 10:14:00,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:14:00,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:14:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash 845443617, now seen corresponding path program 1 times [2023-08-30 10:14:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:14:00,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924274201] [2023-08-30 10:14:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:14:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:14:00,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:14:00,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924274201] [2023-08-30 10:14:00,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924274201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:14:00,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250129625] [2023-08-30 10:14:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:00,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:14:00,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:14:00,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:14:00,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 10:14:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 10:14:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:14:00,345 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:14:00,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:14:00,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:14:00,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:14:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:14:00,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:14:00,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250129625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:14:00,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:14:00,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 10:14:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147912381] [2023-08-30 10:14:00,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:14:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:14:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:14:00,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:14:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:14:00,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 413 [2023-08-30 10:14:00,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 149 transitions, 1023 flow. Second operand has 5 states, 5 states have (on average 188.4) internal successors, (942), 5 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:00,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:14:00,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 413 [2023-08-30 10:14:00,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:14:16,140 INFO L130 PetriNetUnfolder]: 135284/196953 cut-off events. [2023-08-30 10:14:16,140 INFO L131 PetriNetUnfolder]: For 458386/458576 co-relation queries the response was YES. [2023-08-30 10:14:16,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659390 conditions, 196953 events. 135284/196953 cut-off events. For 458386/458576 co-relation queries the response was YES. Maximal size of possible extension queue 5408. Compared 1582543 event pairs, 74985 based on Foata normal form. 1378/195600 useless extension candidates. Maximal degree in co-relation 659271. Up to 145796 conditions per place. [2023-08-30 10:14:17,538 INFO L137 encePairwiseOnDemand]: 398/413 looper letters, 273 selfloop transitions, 32 changer transitions 0/313 dead transitions. [2023-08-30 10:14:17,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 313 transitions, 2607 flow [2023-08-30 10:14:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:14:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:14:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1099 transitions. [2023-08-30 10:14:17,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322033898305085 [2023-08-30 10:14:17,540 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1099 transitions. [2023-08-30 10:14:17,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1099 transitions. [2023-08-30 10:14:17,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:14:17,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1099 transitions. [2023-08-30 10:14:17,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:17,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:17,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:17,544 INFO L175 Difference]: Start difference. First operand has 96 places, 149 transitions, 1023 flow. Second operand 5 states and 1099 transitions. [2023-08-30 10:14:17,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 313 transitions, 2607 flow [2023-08-30 10:14:20,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 313 transitions, 2548 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-30 10:14:20,236 INFO L231 Difference]: Finished difference. Result has 100 places, 166 transitions, 1260 flow [2023-08-30 10:14:20,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1260, PETRI_PLACES=100, PETRI_TRANSITIONS=166} [2023-08-30 10:14:20,236 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 27 predicate places. [2023-08-30 10:14:20,236 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 166 transitions, 1260 flow [2023-08-30 10:14:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.4) internal successors, (942), 5 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:20,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:14:20,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:14:20,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 10:14:20,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 10:14:20,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:14:20,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:14:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 845443618, now seen corresponding path program 1 times [2023-08-30 10:14:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:14:20,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489622085] [2023-08-30 10:14:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:20,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:14:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:14:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:14:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489622085] [2023-08-30 10:14:20,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489622085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:14:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108818301] [2023-08-30 10:14:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:20,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:14:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:14:20,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:14:20,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 10:14:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 10:14:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:14:20,716 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:14:20,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:14:20,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:14:20,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:14:20,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:14:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:14:20,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:14:20,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108818301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:14:20,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:14:20,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-08-30 10:14:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598120417] [2023-08-30 10:14:20,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:14:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:14:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:14:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:14:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 10:14:20,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 413 [2023-08-30 10:14:20,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 166 transitions, 1260 flow. Second operand has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:20,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:14:20,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 413 [2023-08-30 10:14:20,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:14:37,652 INFO L130 PetriNetUnfolder]: 131454/191740 cut-off events. [2023-08-30 10:14:37,652 INFO L131 PetriNetUnfolder]: For 510019/510076 co-relation queries the response was YES. [2023-08-30 10:14:38,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669407 conditions, 191740 events. 131454/191740 cut-off events. For 510019/510076 co-relation queries the response was YES. Maximal size of possible extension queue 5229. Compared 1530656 event pairs, 53298 based on Foata normal form. 448/189533 useless extension candidates. Maximal degree in co-relation 669285. Up to 181592 conditions per place. [2023-08-30 10:14:39,286 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 208 selfloop transitions, 33 changer transitions 0/249 dead transitions. [2023-08-30 10:14:39,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 249 transitions, 2216 flow [2023-08-30 10:14:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:14:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:14:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1233 transitions. [2023-08-30 10:14:39,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975786924939467 [2023-08-30 10:14:39,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1233 transitions. [2023-08-30 10:14:39,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1233 transitions. [2023-08-30 10:14:39,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:14:39,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1233 transitions. [2023-08-30 10:14:39,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.5) internal successors, (1233), 6 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:39,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:39,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:39,292 INFO L175 Difference]: Start difference. First operand has 100 places, 166 transitions, 1260 flow. Second operand 6 states and 1233 transitions. [2023-08-30 10:14:39,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 249 transitions, 2216 flow [2023-08-30 10:14:51,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 249 transitions, 2202 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 10:14:51,493 INFO L231 Difference]: Finished difference. Result has 105 places, 181 transitions, 1486 flow [2023-08-30 10:14:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1486, PETRI_PLACES=105, PETRI_TRANSITIONS=181} [2023-08-30 10:14:51,493 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 32 predicate places. [2023-08-30 10:14:51,494 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 181 transitions, 1486 flow [2023-08-30 10:14:51,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:51,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:14:51,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:14:51,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 10:14:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:14:51,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:14:51,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:14:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1305559953, now seen corresponding path program 1 times [2023-08-30 10:14:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:14:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402043127] [2023-08-30 10:14:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:14:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:14:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:14:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402043127] [2023-08-30 10:14:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402043127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:14:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860967148] [2023-08-30 10:14:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:14:51,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:14:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:14:51,825 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:14:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 10:14:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:14:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 10:14:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:14:51,958 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:14:51,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 10:14:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:14:52,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:14:52,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 10:14:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:14:52,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:14:52,087 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1156 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1156) |c_~#global~0.base|) |c_~#global~0.offset|)))) is different from false [2023-08-30 10:14:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 10:14:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860967148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:14:52,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:14:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 10:14:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25858993] [2023-08-30 10:14:52,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:14:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 10:14:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:14:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 10:14:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=90, Unknown=1, NotChecked=20, Total=156 [2023-08-30 10:14:52,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 413 [2023-08-30 10:14:52,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 181 transitions, 1486 flow. Second operand has 13 states, 13 states have (on average 158.53846153846155) internal successors, (2061), 13 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:14:52,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:14:52,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 413 [2023-08-30 10:14:52,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand