./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_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_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --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 10:05:53,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:05:53,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:05:53,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:05:53,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:05:53,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:05:53,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:05:53,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:05:53,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:05:53,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:05:53,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:05:53,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:05:53,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:05:53,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:05:53,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:05:53,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:05:53,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:05:53,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:05:53,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:05:53,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:05:53,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:05:53,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:05:53,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:05:53,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:05:53,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:05:53,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:05:53,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:05:53,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:05:53,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:05:53,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:05:53,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:05:53,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:05:53,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:05:53,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:05:53,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:05:53,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:05:53,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:05:53,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:05:53,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:05:53,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:05:53,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:05:53,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:05:53,141 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:05:53,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:05:53,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:05:53,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:05:53,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:05:53,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:05:53,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:05:53,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:05:53,145 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:05:53,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:05:53,146 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:05:53,146 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:05:53,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:05:53,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:05:53,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:05:53,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:05:53,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:05:53,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:05:53,147 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:05:53,147 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:05:53,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:05:53,148 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:05:53,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:05:53,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:05:53,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:05:53,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:05:53,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:05:53,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:05:53,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:05:53,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:05:53,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:05:53,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:05:53,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:05:53,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:05:53,150 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:05:53,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:05:53,151 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:05:53,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:05:53,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:05:53,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:05:53,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:05:53,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:05:53,485 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:05:53,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-30 10:05:54,705 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:05:54,951 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:05:54,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-30 10:05:54,980 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4934003/eb1f4636637f4db8b2fdac21ef19c68a/FLAGec6af60f6 [2023-08-30 10:05:54,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4934003/eb1f4636637f4db8b2fdac21ef19c68a [2023-08-30 10:05:54,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:05:55,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:05:55,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:05:55,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:05:55,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:05:55,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:05:54" (1/1) ... [2023-08-30 10:05:55,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da4c342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55, skipping insertion in model container [2023-08-30 10:05:55,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:05:54" (1/1) ... [2023-08-30 10:05:55,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:05:55,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:05:55,368 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_22-deref_read_racefree.i[30176,30189] [2023-08-30 10:05:55,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:05:55,400 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:05:55,454 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_22-deref_read_racefree.i[30176,30189] [2023-08-30 10:05:55,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:05:55,520 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:05:55,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55 WrapperNode [2023-08-30 10:05:55,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:05:55,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:05:55,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:05:55,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:05:55,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,562 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-30 10:05:55,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:05:55,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:05:55,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:05:55,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:05:55,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:05:55,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:05:55,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:05:55,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:05:55,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (1/1) ... [2023-08-30 10:05:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:05:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:05:55,626 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 10:05:55,651 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 10:05:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:05:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:05:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:05:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:05:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:05:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 10:05:55,676 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 10:05:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:05:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:05:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:05:55,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:05:55,678 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 10:05:55,828 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:05:55,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:05:56,064 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:05:56,070 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:05:56,071 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-30 10:05:56,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:05:56 BoogieIcfgContainer [2023-08-30 10:05:56,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:05:56,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:05:56,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:05:56,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:05:56,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:05:54" (1/3) ... [2023-08-30 10:05:56,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e672ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:05:56, skipping insertion in model container [2023-08-30 10:05:56,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:05:55" (2/3) ... [2023-08-30 10:05:56,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e672ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:05:56, skipping insertion in model container [2023-08-30 10:05:56,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:05:56" (3/3) ... [2023-08-30 10:05:56,081 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-30 10:05:56,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:05:56,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:05:56,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 10:05:56,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:05:56,159 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 10:05:56,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,258 INFO L130 PetriNetUnfolder]: 14/141 cut-off events. [2023-08-30 10:05:56,258 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:56,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 14/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-30 10:05:56,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,281 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:05:56,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:05:56,346 INFO L130 PetriNetUnfolder]: 14/141 cut-off events. [2023-08-30 10:05:56,347 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:56,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 14/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-30 10:05:56,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 3200 [2023-08-30 10:05:59,104 INFO L134 LiptonReduction]: Checked pairs total: 6065 [2023-08-30 10:05:59,104 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-30 10:05:59,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:05:59,127 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:05:59,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 10:05:59,133 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 10:05:59,134 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:59,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:59,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:05:59,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:59,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 13430229, now seen corresponding path program 1 times [2023-08-30 10:05:59,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:59,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626010384] [2023-08-30 10:05:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:59,374 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 10:05:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626010384] [2023-08-30 10:05:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626010384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:59,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:05:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430625596] [2023-08-30 10:05:59,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:59,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:05:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:05:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:05:59,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-08-30 10:05:59,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 35 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:59,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-08-30 10:05:59,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:59,569 INFO L130 PetriNetUnfolder]: 91/216 cut-off events. [2023-08-30 10:05:59,569 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:05:59,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 216 events. 91/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 768 event pairs, 72 based on Foata normal form. 16/186 useless extension candidates. Maximal degree in co-relation 413. Up to 190 conditions per place. [2023-08-30 10:05:59,574 INFO L137 encePairwiseOnDemand]: 199/212 looper letters, 26 selfloop transitions, 2 changer transitions 8/39 dead transitions. [2023-08-30 10:05:59,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 155 flow [2023-08-30 10:05:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:05:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:05:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-30 10:05:59,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314465408805031 [2023-08-30 10:05:59,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-30 10:05:59,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-30 10:05:59,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:59,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-30 10:05:59,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,606 INFO L175 Difference]: Start difference. First operand has 30 places, 35 transitions, 75 flow. Second operand 3 states and 338 transitions. [2023-08-30 10:05:59,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 155 flow [2023-08-30 10:05:59,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 155 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:05:59,610 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 55 flow [2023-08-30 10:05:59,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2023-08-30 10:05:59,615 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-08-30 10:05:59,615 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 55 flow [2023-08-30 10:05:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:05:59,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:05:59,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:05:59,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:05:59,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:05:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash 668144285, now seen corresponding path program 1 times [2023-08-30 10:05:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:05:59,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852323320] [2023-08-30 10:05:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:05:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:05:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:05:59,840 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 10:05:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:05:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852323320] [2023-08-30 10:05:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852323320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:05:59,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:05:59,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:05:59,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705971809] [2023-08-30 10:05:59,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:05:59,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:05:59,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:05:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:05:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:05:59,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 212 [2023-08-30 10:05:59,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:05:59,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:05:59,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 212 [2023-08-30 10:05:59,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:05:59,984 INFO L130 PetriNetUnfolder]: 49/126 cut-off events. [2023-08-30 10:05:59,984 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 10:05:59,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 126 events. 49/126 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 395 event pairs, 21 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 258. Up to 61 conditions per place. [2023-08-30 10:05:59,989 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-08-30 10:05:59,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 132 flow [2023-08-30 10:05:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:05:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:05:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-08-30 10:05:59,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705188679245283 [2023-08-30 10:05:59,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-08-30 10:05:59,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-08-30 10:05:59,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:05:59,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-08-30 10:05:59,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,003 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 55 flow. Second operand 4 states and 399 transitions. [2023-08-30 10:06:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 132 flow [2023-08-30 10:06:00,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:06:00,005 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 64 flow [2023-08-30 10:06:00,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-30 10:06:00,006 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 10:06:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 64 flow [2023-08-30 10:06:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:00,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 10:06:00,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:00,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash 176787686, now seen corresponding path program 1 times [2023-08-30 10:06:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428437014] [2023-08-30 10:06:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:00,273 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 10:06:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428437014] [2023-08-30 10:06:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428437014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:00,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:00,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:06:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289336852] [2023-08-30 10:06:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:06:00,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 212 [2023-08-30 10:06:00,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 64 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:00,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 212 [2023-08-30 10:06:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:00,518 INFO L130 PetriNetUnfolder]: 41/118 cut-off events. [2023-08-30 10:06:00,518 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:06:00,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 118 events. 41/118 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 408 event pairs, 12 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 249. Up to 35 conditions per place. [2023-08-30 10:06:00,519 INFO L137 encePairwiseOnDemand]: 204/212 looper letters, 31 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-08-30 10:06:00,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 214 flow [2023-08-30 10:06:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:06:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:06:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 836 transitions. [2023-08-30 10:06:00,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381551362683438 [2023-08-30 10:06:00,522 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 836 transitions. [2023-08-30 10:06:00,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 836 transitions. [2023-08-30 10:06:00,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:00,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 836 transitions. [2023-08-30 10:06:00,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.88888888888889) internal successors, (836), 9 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 212.0) internal successors, (2120), 10 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 212.0) internal successors, (2120), 10 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,530 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 64 flow. Second operand 9 states and 836 transitions. [2023-08-30 10:06:00,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 214 flow [2023-08-30 10:06:00,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:00,531 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 119 flow [2023-08-30 10:06:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-30 10:06:00,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-30 10:06:00,532 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 119 flow [2023-08-30 10:06:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:00,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:00,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 10:06:00,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:00,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 176787703, now seen corresponding path program 1 times [2023-08-30 10:06:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:00,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690878157] [2023-08-30 10:06:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:00,596 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 10:06:00,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:00,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690878157] [2023-08-30 10:06:00,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690878157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:00,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:00,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:00,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849154784] [2023-08-30 10:06:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:00,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:00,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:00,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-08-30 10:06:00,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:00,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-08-30 10:06:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:00,674 INFO L130 PetriNetUnfolder]: 34/101 cut-off events. [2023-08-30 10:06:00,675 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-08-30 10:06:00,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 101 events. 34/101 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 21 based on Foata normal form. 8/108 useless extension candidates. Maximal degree in co-relation 261. Up to 59 conditions per place. [2023-08-30 10:06:00,678 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 9 selfloop transitions, 6 changer transitions 14/32 dead transitions. [2023-08-30 10:06:00,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 192 flow [2023-08-30 10:06:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-30 10:06:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2023-08-30 10:06:00,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-30 10:06:00,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-30 10:06:00,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:00,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-30 10:06:00,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,684 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 119 flow. Second operand 3 states and 310 transitions. [2023-08-30 10:06:00,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 192 flow [2023-08-30 10:06:00,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 173 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 10:06:00,689 INFO L231 Difference]: Finished difference. Result has 34 places, 17 transitions, 78 flow [2023-08-30 10:06:00,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=17} [2023-08-30 10:06:00,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-30 10:06:00,690 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 17 transitions, 78 flow [2023-08-30 10:06:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:00,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:00,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:00,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:06:00,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:00,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 878706328, now seen corresponding path program 1 times [2023-08-30 10:06:00,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:00,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435805563] [2023-08-30 10:06:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:00,869 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 10:06:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435805563] [2023-08-30 10:06:00,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435805563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:00,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805380820] [2023-08-30 10:06:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:00,877 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 10:06:00,895 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 10:06:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:01,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:06:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:01,111 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:01,112 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 10:06:01,173 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 10:06:01,289 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 10:06:01,336 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 10:06:01,363 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 10:06:01,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805380820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:01,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:01,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:06:01,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972034335] [2023-08-30 10:06:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:01,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:06:01,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 212 [2023-08-30 10:06:01,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 17 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:01,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:01,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 212 [2023-08-30 10:06:01,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:01,508 INFO L130 PetriNetUnfolder]: 6/28 cut-off events. [2023-08-30 10:06:01,508 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 10:06:01,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 28 events. 6/28 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 2 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 65. Up to 10 conditions per place. [2023-08-30 10:06:01,509 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 12 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2023-08-30 10:06:01,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 18 transitions, 108 flow [2023-08-30 10:06:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:06:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:06:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 459 transitions. [2023-08-30 10:06:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330188679245283 [2023-08-30 10:06:01,511 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 459 transitions. [2023-08-30 10:06:01,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 459 transitions. [2023-08-30 10:06:01,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:01,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 459 transitions. [2023-08-30 10:06:01,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:01,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:01,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:01,515 INFO L175 Difference]: Start difference. First operand has 34 places, 17 transitions, 78 flow. Second operand 5 states and 459 transitions. [2023-08-30 10:06:01,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 18 transitions, 108 flow [2023-08-30 10:06:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 18 transitions, 95 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:06:01,517 INFO L231 Difference]: Finished difference. Result has 26 places, 16 transitions, 67 flow [2023-08-30 10:06:01,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=67, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2023-08-30 10:06:01,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-30 10:06:01,518 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 67 flow [2023-08-30 10:06:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:01,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 10:06:01,724 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 10:06:01,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-08-30 10:06:01,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash 878706345, now seen corresponding path program 1 times [2023-08-30 10:06:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630550232] [2023-08-30 10:06:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:01,894 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 10:06:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630550232] [2023-08-30 10:06:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630550232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:01,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514599994] [2023-08-30 10:06:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:01,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:01,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:01,896 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 10:06:01,911 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 10:06:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 10:06:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:01,992 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:01,993 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 10:06:02,032 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 10:06:02,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:06:02,075 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 10:06:02,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514599994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:02,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 10:06:02,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595918357] [2023-08-30 10:06:02,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:02,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:06:02,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:06:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 10:06:02,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 212 [2023-08-30 10:06:02,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 94.2) internal successors, (471), 5 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 10:06:02,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:02,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 212 [2023-08-30 10:06:02,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:02,156 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-08-30 10:06:02,156 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 10:06:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 27 events. 6/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 5 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 56. Up to 22 conditions per place. [2023-08-30 10:06:02,157 INFO L137 encePairwiseOnDemand]: 210/212 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-30 10:06:02,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 15 transitions, 86 flow [2023-08-30 10:06:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-30 10:06:02,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-08-30 10:06:02,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-30 10:06:02,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-30 10:06:02,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:02,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-30 10:06:02,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:02,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:02,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:02,161 INFO L175 Difference]: Start difference. First operand has 26 places, 16 transitions, 67 flow. Second operand 3 states and 286 transitions. [2023-08-30 10:06:02,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 15 transitions, 86 flow [2023-08-30 10:06:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 15 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:06:02,162 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-30 10:06:02,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=3, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-30 10:06:02,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -7 predicate places. [2023-08-30 10:06:02,163 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-30 10:06:02,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.2) internal successors, (471), 5 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 10:06:02,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-08-30 10:06:02,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-08-30 10:06:02,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-08-30 10:06:02,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-08-30 10:06:02,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-08-30 10:06:02,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-08-30 10:06:02,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-08-30 10:06:02,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-08-30 10:06:02,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-08-30 10:06:02,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-08-30 10:06:02,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 10:06:02,373 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 10:06:02,373 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 10:06:02,375 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:06:02,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,390 INFO L130 PetriNetUnfolder]: 14/141 cut-off events. [2023-08-30 10:06:02,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:02,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 14/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-30 10:06:02,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:02,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 111 transitions, 227 flow [2023-08-30 10:06:02,414 INFO L130 PetriNetUnfolder]: 14/141 cut-off events. [2023-08-30 10:06:02,414 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:02,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 14/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-30 10:06:02,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 3200 [2023-08-30 10:06:04,924 INFO L134 LiptonReduction]: Checked pairs total: 6065 [2023-08-30 10:06:04,924 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-30 10:06:04,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:06:04,926 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:04,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:06:04,928 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-08-30 10:06:04,928 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:04,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:04,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 10:06:04,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:06:04,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1259832612, now seen corresponding path program 1 times [2023-08-30 10:06:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:04,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650652458] [2023-08-30 10:06:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:04,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:06:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:04,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:06:04,975 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:06:04,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:06:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 10:06:04,976 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:06:04,976 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:06:04,977 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:06:04,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 10:06:04,997 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 10:06:05,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,023 INFO L130 PetriNetUnfolder]: 24/221 cut-off events. [2023-08-30 10:06:05,024 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 10:06:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 221 events. 24/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 649 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-08-30 10:06:05,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,027 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:05,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:05,049 INFO L130 PetriNetUnfolder]: 24/221 cut-off events. [2023-08-30 10:06:05,049 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 10:06:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 221 events. 24/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 649 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-08-30 10:06:05,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 9680 [2023-08-30 10:06:07,723 INFO L134 LiptonReduction]: Checked pairs total: 21045 [2023-08-30 10:06:07,723 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-30 10:06:07,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:06:07,725 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:07,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-30 10:06:07,727 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 10:06:07,727 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:07,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:07,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:06:07,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:07,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash 825545606, now seen corresponding path program 1 times [2023-08-30 10:06:07,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644856969] [2023-08-30 10:06:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:07,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:07,764 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 10:06:07,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644856969] [2023-08-30 10:06:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644856969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:06:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218059686] [2023-08-30 10:06:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:07,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:07,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 286 [2023-08-30 10:06:07,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:07,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:07,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 286 [2023-08-30 10:06:07,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:08,261 INFO L130 PetriNetUnfolder]: 3522/5699 cut-off events. [2023-08-30 10:06:08,261 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-08-30 10:06:08,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11348 conditions, 5699 events. 3522/5699 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38268 event pairs, 1638 based on Foata normal form. 604/4540 useless extension candidates. Maximal degree in co-relation 1460. Up to 5564 conditions per place. [2023-08-30 10:06:08,293 INFO L137 encePairwiseOnDemand]: 267/286 looper letters, 50 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 10:06:08,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 232 flow [2023-08-30 10:06:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 10:06:08,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-08-30 10:06:08,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 10:06:08,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 10:06:08,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:08,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 10:06:08,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,299 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 128 flow. Second operand 3 states and 462 transitions. [2023-08-30 10:06:08,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 232 flow [2023-08-30 10:06:08,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 230 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 10:06:08,303 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 114 flow [2023-08-30 10:06:08,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-30 10:06:08,304 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 10:06:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 114 flow [2023-08-30 10:06:08,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:08,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:08,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 10:06:08,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:08,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1213235511, now seen corresponding path program 1 times [2023-08-30 10:06:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868977334] [2023-08-30 10:06:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:08,378 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 10:06:08,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868977334] [2023-08-30 10:06:08,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868977334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:08,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:08,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:08,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904623601] [2023-08-30 10:06:08,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:08,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:06:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:06:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:06:08,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 286 [2023-08-30 10:06:08,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:08,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 286 [2023-08-30 10:06:08,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:08,901 INFO L130 PetriNetUnfolder]: 3164/5101 cut-off events. [2023-08-30 10:06:08,901 INFO L131 PetriNetUnfolder]: For 403/403 co-relation queries the response was YES. [2023-08-30 10:06:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 5101 events. 3164/5101 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32262 event pairs, 1209 based on Foata normal form. 0/3826 useless extension candidates. Maximal degree in co-relation 10828. Up to 4704 conditions per place. [2023-08-30 10:06:08,927 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 58 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2023-08-30 10:06:08,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 308 flow [2023-08-30 10:06:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:06:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:06:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-30 10:06:08,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49475524475524474 [2023-08-30 10:06:08,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-30 10:06:08,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-30 10:06:08,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:08,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-30 10:06:08,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,935 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 4 states and 566 transitions. [2023-08-30 10:06:08,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 308 flow [2023-08-30 10:06:08,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:08,937 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 163 flow [2023-08-30 10:06:08,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-30 10:06:08,938 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-30 10:06:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 163 flow [2023-08-30 10:06:08,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:08,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:06:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 10:06:08,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:08,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 535363508, now seen corresponding path program 1 times [2023-08-30 10:06:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752777443] [2023-08-30 10:06:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:08,963 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 10:06:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752777443] [2023-08-30 10:06:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752777443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:08,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:08,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:08,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421598287] [2023-08-30 10:06:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:08,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 286 [2023-08-30 10:06:08,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:08,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:08,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 286 [2023-08-30 10:06:08,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:09,375 INFO L130 PetriNetUnfolder]: 2838/4557 cut-off events. [2023-08-30 10:06:09,375 INFO L131 PetriNetUnfolder]: For 837/837 co-relation queries the response was YES. [2023-08-30 10:06:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 4557 events. 2838/4557 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 29208 event pairs, 885 based on Foata normal form. 0/3703 useless extension candidates. Maximal degree in co-relation 8096. Up to 3145 conditions per place. [2023-08-30 10:06:09,404 INFO L137 encePairwiseOnDemand]: 282/286 looper letters, 68 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-30 10:06:09,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 387 flow [2023-08-30 10:06:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-30 10:06:09,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233100233100233 [2023-08-30 10:06:09,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-30 10:06:09,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-30 10:06:09,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:09,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-30 10:06:09,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,410 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 163 flow. Second operand 3 states and 449 transitions. [2023-08-30 10:06:09,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 387 flow [2023-08-30 10:06:09,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 387 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:06:09,417 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 175 flow [2023-08-30 10:06:09,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-30 10:06:09,418 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-30 10:06:09,418 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 175 flow [2023-08-30 10:06:09,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:09,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:06:09,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 10:06:09,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:09,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 535363479, now seen corresponding path program 1 times [2023-08-30 10:06:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:09,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440309989] [2023-08-30 10:06:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:09,452 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 10:06:09,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440309989] [2023-08-30 10:06:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440309989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112161831] [2023-08-30 10:06:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:09,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:09,455 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 10:06:09,457 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 10:06:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:06:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:09,549 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 10:06:09,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112161831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:09,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:06:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727721344] [2023-08-30 10:06:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:09,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:06:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:06:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:06:09,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 286 [2023-08-30 10:06:09,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:09,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 286 [2023-08-30 10:06:09,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:09,906 INFO L130 PetriNetUnfolder]: 2512/4073 cut-off events. [2023-08-30 10:06:09,906 INFO L131 PetriNetUnfolder]: For 2360/2360 co-relation queries the response was YES. [2023-08-30 10:06:09,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10094 conditions, 4073 events. 2512/4073 cut-off events. For 2360/2360 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24339 event pairs, 2270 based on Foata normal form. 177/3647 useless extension candidates. Maximal degree in co-relation 7596. Up to 4005 conditions per place. [2023-08-30 10:06:09,924 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 10:06:09,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 300 flow [2023-08-30 10:06:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:06:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:06:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-08-30 10:06:09,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938811188811189 [2023-08-30 10:06:09,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-08-30 10:06:09,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-08-30 10:06:09,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:09,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-08-30 10:06:09,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,931 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 175 flow. Second operand 4 states and 565 transitions. [2023-08-30 10:06:09,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 300 flow [2023-08-30 10:06:09,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:09,936 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 171 flow [2023-08-30 10:06:09,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-30 10:06:09,938 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-08-30 10:06:09,938 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 171 flow [2023-08-30 10:06:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:09,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:09,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:09,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 10:06:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:10,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:10,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1145511755, now seen corresponding path program 1 times [2023-08-30 10:06:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:10,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989551266] [2023-08-30 10:06:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:10,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:10,294 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 10:06:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989551266] [2023-08-30 10:06:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989551266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:10,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:10,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:06:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72256563] [2023-08-30 10:06:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:06:10,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 286 [2023-08-30 10:06:10,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:10,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:10,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 286 [2023-08-30 10:06:10,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:11,032 INFO L130 PetriNetUnfolder]: 3525/5872 cut-off events. [2023-08-30 10:06:11,032 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-08-30 10:06:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13978 conditions, 5872 events. 3525/5872 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38013 event pairs, 618 based on Foata normal form. 0/5125 useless extension candidates. Maximal degree in co-relation 13881. Up to 3315 conditions per place. [2023-08-30 10:06:11,057 INFO L137 encePairwiseOnDemand]: 269/286 looper letters, 128 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2023-08-30 10:06:11,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 162 transitions, 846 flow [2023-08-30 10:06:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:06:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:06:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1236 transitions. [2023-08-30 10:06:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801864801864802 [2023-08-30 10:06:11,062 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1236 transitions. [2023-08-30 10:06:11,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1236 transitions. [2023-08-30 10:06:11,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:11,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1236 transitions. [2023-08-30 10:06:11,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.33333333333334) internal successors, (1236), 9 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,071 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,071 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 171 flow. Second operand 9 states and 1236 transitions. [2023-08-30 10:06:11,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 162 transitions, 846 flow [2023-08-30 10:06:11,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 162 transitions, 839 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:06:11,079 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 400 flow [2023-08-30 10:06:11,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=400, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 10:06:11,080 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2023-08-30 10:06:11,080 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 400 flow [2023-08-30 10:06:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:11,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:11,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 10:06:11,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1145511783, now seen corresponding path program 1 times [2023-08-30 10:06:11,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578527465] [2023-08-30 10:06:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:11,142 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 10:06:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:11,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578527465] [2023-08-30 10:06:11,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578527465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:11,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:11,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:06:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752161276] [2023-08-30 10:06:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:06:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:06:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:06:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 286 [2023-08-30 10:06:11,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:11,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 286 [2023-08-30 10:06:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:11,930 INFO L130 PetriNetUnfolder]: 3679/6372 cut-off events. [2023-08-30 10:06:11,930 INFO L131 PetriNetUnfolder]: For 8236/8236 co-relation queries the response was YES. [2023-08-30 10:06:11,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19259 conditions, 6372 events. 3679/6372 cut-off events. For 8236/8236 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 43494 event pairs, 887 based on Foata normal form. 330/6693 useless extension candidates. Maximal degree in co-relation 19156. Up to 2799 conditions per place. [2023-08-30 10:06:11,967 INFO L137 encePairwiseOnDemand]: 272/286 looper letters, 113 selfloop transitions, 41 changer transitions 0/160 dead transitions. [2023-08-30 10:06:11,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 160 transitions, 1141 flow [2023-08-30 10:06:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:06:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:06:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 723 transitions. [2023-08-30 10:06:11,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055944055944056 [2023-08-30 10:06:11,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 723 transitions. [2023-08-30 10:06:11,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 723 transitions. [2023-08-30 10:06:11,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:11,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 723 transitions. [2023-08-30 10:06:11,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,975 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:11,975 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 400 flow. Second operand 5 states and 723 transitions. [2023-08-30 10:06:11,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 160 transitions, 1141 flow [2023-08-30 10:06:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 160 transitions, 1116 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 10:06:11,999 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 807 flow [2023-08-30 10:06:12,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=807, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2023-08-30 10:06:12,001 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2023-08-30 10:06:12,002 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 807 flow [2023-08-30 10:06:12,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:12,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:12,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 10:06:12,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:12,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -649991754, now seen corresponding path program 1 times [2023-08-30 10:06:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:12,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649988450] [2023-08-30 10:06:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:12,181 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 10:06:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649988450] [2023-08-30 10:06:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649988450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725134313] [2023-08-30 10:06:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:12,191 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 10:06:12,192 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 10:06:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:06:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:12,302 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:12,303 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 10:06:12,329 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 10:06:12,427 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 10:06:12,470 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 10:06:12,489 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 10:06:12,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725134313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:06:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917714324] [2023-08-30 10:06:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:12,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:06:12,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 286 [2023-08-30 10:06:12,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 807 flow. Second operand has 6 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:12,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:12,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 286 [2023-08-30 10:06:12,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:13,445 INFO L130 PetriNetUnfolder]: 3566/6197 cut-off events. [2023-08-30 10:06:13,446 INFO L131 PetriNetUnfolder]: For 15471/15474 co-relation queries the response was YES. [2023-08-30 10:06:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21852 conditions, 6197 events. 3566/6197 cut-off events. For 15471/15474 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 41829 event pairs, 1117 based on Foata normal form. 59/6252 useless extension candidates. Maximal degree in co-relation 21736. Up to 4843 conditions per place. [2023-08-30 10:06:13,485 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 140 selfloop transitions, 26 changer transitions 0/172 dead transitions. [2023-08-30 10:06:13,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 172 transitions, 1599 flow [2023-08-30 10:06:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:06:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:06:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2023-08-30 10:06:13,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-08-30 10:06:13,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2023-08-30 10:06:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2023-08-30 10:06:13,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:13,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2023-08-30 10:06:13,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:13,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 286.0) internal successors, (2002), 7 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:13,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 286.0) internal successors, (2002), 7 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:13,494 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 807 flow. Second operand 6 states and 819 transitions. [2023-08-30 10:06:13,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 172 transitions, 1599 flow [2023-08-30 10:06:13,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 172 transitions, 1593 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 10:06:13,545 INFO L231 Difference]: Finished difference. Result has 84 places, 114 transitions, 1017 flow [2023-08-30 10:06:13,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1017, PETRI_PLACES=84, PETRI_TRANSITIONS=114} [2023-08-30 10:06:13,546 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2023-08-30 10:06:13,547 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 114 transitions, 1017 flow [2023-08-30 10:06:13,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:13,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:13,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:13,555 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 10:06:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:13,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:13,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash -649991726, now seen corresponding path program 1 times [2023-08-30 10:06:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:13,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090561719] [2023-08-30 10:06:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:13,876 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 10:06:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:13,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090561719] [2023-08-30 10:06:13,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090561719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:13,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136463037] [2023-08-30 10:06:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:13,879 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 10:06:13,887 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 10:06:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 10:06:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:13,975 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:13,976 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 10:06:14,035 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 10:06:14,060 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 10:06:14,073 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 10:06:14,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136463037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:14,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:06:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402252066] [2023-08-30 10:06:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:14,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:06:14,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 286 [2023-08-30 10:06:14,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 114 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:14,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:14,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 286 [2023-08-30 10:06:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:14,897 INFO L130 PetriNetUnfolder]: 3512/6126 cut-off events. [2023-08-30 10:06:14,897 INFO L131 PetriNetUnfolder]: For 17771/17774 co-relation queries the response was YES. [2023-08-30 10:06:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 6126 events. 3512/6126 cut-off events. For 17771/17774 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 41460 event pairs, 1446 based on Foata normal form. 65/6176 useless extension candidates. Maximal degree in co-relation 22321. Up to 2990 conditions per place. [2023-08-30 10:06:14,940 INFO L137 encePairwiseOnDemand]: 275/286 looper letters, 178 selfloop transitions, 42 changer transitions 6/232 dead transitions. [2023-08-30 10:06:14,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 232 transitions, 2227 flow [2023-08-30 10:06:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:06:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:06:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 970 transitions. [2023-08-30 10:06:14,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451548451548454 [2023-08-30 10:06:14,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 970 transitions. [2023-08-30 10:06:14,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 970 transitions. [2023-08-30 10:06:14,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:14,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 970 transitions. [2023-08-30 10:06:14,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:14,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 286.0) internal successors, (2288), 8 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:14,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 286.0) internal successors, (2288), 8 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:14,951 INFO L175 Difference]: Start difference. First operand has 84 places, 114 transitions, 1017 flow. Second operand 7 states and 970 transitions. [2023-08-30 10:06:14,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 232 transitions, 2227 flow [2023-08-30 10:06:14,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 232 transitions, 2203 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 10:06:14,999 INFO L231 Difference]: Finished difference. Result has 92 places, 136 transitions, 1414 flow [2023-08-30 10:06:15,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1414, PETRI_PLACES=92, PETRI_TRANSITIONS=136} [2023-08-30 10:06:15,001 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2023-08-30 10:06:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 136 transitions, 1414 flow [2023-08-30 10:06:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:15,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:15,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:15,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 10:06:15,207 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 10:06:15,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:15,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1733698038, now seen corresponding path program 1 times [2023-08-30 10:06:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644524613] [2023-08-30 10:06:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:15,355 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 10:06:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:15,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644524613] [2023-08-30 10:06:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644524613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71136923] [2023-08-30 10:06:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:15,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:15,357 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 10:06:15,360 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 10:06:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:06:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:15,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:15,451 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 10:06:15,475 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 10:06:15,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:06:15,574 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 10:06:15,595 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 10:06:15,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:15,659 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_280 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_280) c_~p~0.base) c_~p~0.offset)))) is different from false [2023-08-30 10:06:15,682 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 10:06:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71136923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:15,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:15,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:06:15,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429671298] [2023-08-30 10:06:15,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:15,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:06:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:06:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=112, Unknown=1, NotChecked=22, Total=182 [2023-08-30 10:06:15,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 286 [2023-08-30 10:06:15,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 136 transitions, 1414 flow. Second operand has 14 states, 14 states have (on average 100.78571428571429) internal successors, (1411), 14 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:15,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:15,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 286 [2023-08-30 10:06:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:16,960 INFO L130 PetriNetUnfolder]: 4351/7556 cut-off events. [2023-08-30 10:06:16,961 INFO L131 PetriNetUnfolder]: For 31064/31067 co-relation queries the response was YES. [2023-08-30 10:06:16,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29499 conditions, 7556 events. 4351/7556 cut-off events. For 31064/31067 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 52544 event pairs, 763 based on Foata normal form. 210/7760 useless extension candidates. Maximal degree in co-relation 29366. Up to 4086 conditions per place. [2023-08-30 10:06:17,016 INFO L137 encePairwiseOnDemand]: 269/286 looper letters, 276 selfloop transitions, 145 changer transitions 14/441 dead transitions. [2023-08-30 10:06:17,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 441 transitions, 4765 flow [2023-08-30 10:06:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 10:06:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 10:06:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2000 transitions. [2023-08-30 10:06:17,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3885003885003885 [2023-08-30 10:06:17,023 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2000 transitions. [2023-08-30 10:06:17,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2000 transitions. [2023-08-30 10:06:17,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:17,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2000 transitions. [2023-08-30 10:06:17,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.11111111111111) internal successors, (2000), 18 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:17,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 286.0) internal successors, (5434), 19 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:17,036 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 286.0) internal successors, (5434), 19 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:17,036 INFO L175 Difference]: Start difference. First operand has 92 places, 136 transitions, 1414 flow. Second operand 18 states and 2000 transitions. [2023-08-30 10:06:17,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 441 transitions, 4765 flow [2023-08-30 10:06:17,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 441 transitions, 4716 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:17,168 INFO L231 Difference]: Finished difference. Result has 120 places, 255 transitions, 3313 flow [2023-08-30 10:06:17,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3313, PETRI_PLACES=120, PETRI_TRANSITIONS=255} [2023-08-30 10:06:17,169 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2023-08-30 10:06:17,169 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 255 transitions, 3313 flow [2023-08-30 10:06:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 100.78571428571429) internal successors, (1411), 14 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:17,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:17,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:17,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 10:06:17,371 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 10:06:17,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:17,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash 579711186, now seen corresponding path program 1 times [2023-08-30 10:06:17,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:17,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677217004] [2023-08-30 10:06:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:17,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:17,489 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 10:06:17,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677217004] [2023-08-30 10:06:17,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677217004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177532258] [2023-08-30 10:06:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:17,491 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 10:06:17,494 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 10:06:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 10:06:17,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:17,603 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 10:06:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:06:17,630 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 10:06:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 10:06:17,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177532258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:17,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:17,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 10:06:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237759031] [2023-08-30 10:06:17,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:06:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:06:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 10:06:17,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 286 [2023-08-30 10:06:17,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 255 transitions, 3313 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:17,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:17,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 286 [2023-08-30 10:06:17,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:18,063 INFO L130 PetriNetUnfolder]: 1129/2362 cut-off events. [2023-08-30 10:06:18,063 INFO L131 PetriNetUnfolder]: For 13453/13453 co-relation queries the response was YES. [2023-08-30 10:06:18,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10533 conditions, 2362 events. 1129/2362 cut-off events. For 13453/13453 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14841 event pairs, 290 based on Foata normal form. 416/2778 useless extension candidates. Maximal degree in co-relation 10466. Up to 1646 conditions per place. [2023-08-30 10:06:18,078 INFO L137 encePairwiseOnDemand]: 275/286 looper letters, 111 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2023-08-30 10:06:18,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 133 transitions, 1767 flow [2023-08-30 10:06:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:06:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:06:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2023-08-30 10:06:18,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571678321678322 [2023-08-30 10:06:18,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2023-08-30 10:06:18,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2023-08-30 10:06:18,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:18,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2023-08-30 10:06:18,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:18,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:18,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:18,086 INFO L175 Difference]: Start difference. First operand has 120 places, 255 transitions, 3313 flow. Second operand 4 states and 523 transitions. [2023-08-30 10:06:18,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 133 transitions, 1767 flow [2023-08-30 10:06:18,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 133 transitions, 1638 flow, removed 62 selfloop flow, removed 7 redundant places. [2023-08-30 10:06:18,153 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1281 flow [2023-08-30 10:06:18,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1281, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2023-08-30 10:06:18,153 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 62 predicate places. [2023-08-30 10:06:18,154 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1281 flow [2023-08-30 10:06:18,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:18,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:18,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:18,161 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 10:06:18,360 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 10:06:18,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:18,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1249517293, now seen corresponding path program 1 times [2023-08-30 10:06:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096201732] [2023-08-30 10:06:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:18,475 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 10:06:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096201732] [2023-08-30 10:06:18,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096201732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:18,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095104361] [2023-08-30 10:06:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:18,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:18,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:18,478 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 10:06:18,498 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 10:06:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 10:06:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:18,592 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 10:06:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:06:18,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:06:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:06:18,645 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 10:06:18,658 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 10:06:18,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:18,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:06:18,725 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 19 treesize of output 20 [2023-08-30 10:06:18,729 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 10:06:18,737 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 10:06:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095104361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:18,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 10:06:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772293609] [2023-08-30 10:06:18,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 10:06:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 10:06:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:06:18,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 286 [2023-08-30 10:06:18,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 1281 flow. Second operand has 10 states, 10 states have (on average 123.1) internal successors, (1231), 10 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:18,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:18,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 286 [2023-08-30 10:06:18,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:19,062 INFO L130 PetriNetUnfolder]: 142/554 cut-off events. [2023-08-30 10:06:19,063 INFO L131 PetriNetUnfolder]: For 2929/2929 co-relation queries the response was YES. [2023-08-30 10:06:19,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 554 events. 142/554 cut-off events. For 2929/2929 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3147 event pairs, 24 based on Foata normal form. 169/723 useless extension candidates. Maximal degree in co-relation 2602. Up to 414 conditions per place. [2023-08-30 10:06:19,065 INFO L137 encePairwiseOnDemand]: 279/286 looper letters, 71 selfloop transitions, 9 changer transitions 10/96 dead transitions. [2023-08-30 10:06:19,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 96 transitions, 1186 flow [2023-08-30 10:06:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:06:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:06:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-30 10:06:19,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 10:06:19,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-30 10:06:19,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-30 10:06:19,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:19,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-30 10:06:19,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:19,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:19,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:19,072 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1281 flow. Second operand 4 states and 520 transitions. [2023-08-30 10:06:19,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 96 transitions, 1186 flow [2023-08-30 10:06:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 1086 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 10:06:19,084 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 753 flow [2023-08-30 10:06:19,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=753, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2023-08-30 10:06:19,084 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2023-08-30 10:06:19,084 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 753 flow [2023-08-30 10:06:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.1) internal successors, (1231), 10 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:19,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:19,085 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 10:06:19,096 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 10:06:19,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 10:06:19,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:19,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1843552280, now seen corresponding path program 1 times [2023-08-30 10:06:19,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:19,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75187511] [2023-08-30 10:06:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:19,515 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 10:06:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75187511] [2023-08-30 10:06:19,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75187511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877254869] [2023-08-30 10:06:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:19,519 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 10:06:19,523 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 10:06:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:19,629 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:19,629 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 10:06:19,692 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 10:06:19,764 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 10:06:19,793 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 10:06:19,822 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 10:06:19,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:19,876 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_412 Int) (v_ArrVal_414 (Array Int Int))) (or (< (+ v_ArrVal_412 1) |c_t_funThread1of2ForFork0_#t~post9|) (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~p~0.base (store (select |c_#memory_int| c_~p~0.base) c_~p~0.offset v_ArrVal_412)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_414) c_~p~0.base) c_~p~0.offset))))) is different from false [2023-08-30 10:06:19,888 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_412 Int) (v_ArrVal_414 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~p~0.base))) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~p~0.base (store .cse0 c_~p~0.offset v_ArrVal_412)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_414) c_~p~0.base) c_~p~0.offset))) (< (+ v_ArrVal_412 1) (select .cse0 c_~p~0.offset))))) is different from false [2023-08-30 10:06:19,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:06:19,913 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 10:06:19,916 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 10:06:19,956 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 10:06:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877254869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:19,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:19,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 10:06:19,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667448886] [2023-08-30 10:06:19,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:19,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:06:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:06:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=231, Unknown=3, NotChecked=66, Total=380 [2023-08-30 10:06:19,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 286 [2023-08-30 10:06:19,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 753 flow. Second operand has 20 states, 20 states have (on average 94.55) internal successors, (1891), 20 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:19,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:19,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 286 [2023-08-30 10:06:19,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:24,545 INFO L130 PetriNetUnfolder]: 120/471 cut-off events. [2023-08-30 10:06:24,545 INFO L131 PetriNetUnfolder]: For 2255/2257 co-relation queries the response was YES. [2023-08-30 10:06:24,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 471 events. 120/471 cut-off events. For 2255/2257 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2580 event pairs, 29 based on Foata normal form. 8/478 useless extension candidates. Maximal degree in co-relation 2078. Up to 105 conditions per place. [2023-08-30 10:06:24,548 INFO L137 encePairwiseOnDemand]: 269/286 looper letters, 100 selfloop transitions, 45 changer transitions 1/152 dead transitions. [2023-08-30 10:06:24,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1558 flow [2023-08-30 10:06:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 10:06:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 10:06:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1771 transitions. [2023-08-30 10:06:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344017094017094 [2023-08-30 10:06:24,554 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1771 transitions. [2023-08-30 10:06:24,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1771 transitions. [2023-08-30 10:06:24,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:24,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1771 transitions. [2023-08-30 10:06:24,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:24,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 286.0) internal successors, (5434), 19 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:24,567 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 286.0) internal successors, (5434), 19 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:24,567 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 753 flow. Second operand 18 states and 1771 transitions. [2023-08-30 10:06:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1558 flow [2023-08-30 10:06:24,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 152 transitions, 1535 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 10:06:24,578 INFO L231 Difference]: Finished difference. Result has 122 places, 94 transitions, 1011 flow [2023-08-30 10:06:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1011, PETRI_PLACES=122, PETRI_TRANSITIONS=94} [2023-08-30 10:06:24,578 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-08-30 10:06:24,579 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 94 transitions, 1011 flow [2023-08-30 10:06:24,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.55) internal successors, (1891), 20 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:24,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:24,580 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 10:06:24,589 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 10:06:24,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:24,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:24,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1302168591, now seen corresponding path program 1 times [2023-08-30 10:06:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:24,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410374580] [2023-08-30 10:06:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:24,916 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 10:06:24,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:24,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410374580] [2023-08-30 10:06:24,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410374580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:24,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:24,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:06:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308491218] [2023-08-30 10:06:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:24,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:06:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 286 [2023-08-30 10:06:25,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 94 transitions, 1011 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:25,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 286 [2023-08-30 10:06:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:25,258 INFO L130 PetriNetUnfolder]: 134/518 cut-off events. [2023-08-30 10:06:25,258 INFO L131 PetriNetUnfolder]: For 3038/3040 co-relation queries the response was YES. [2023-08-30 10:06:25,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 518 events. 134/518 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3006 event pairs, 33 based on Foata normal form. 5/522 useless extension candidates. Maximal degree in co-relation 2448. Up to 178 conditions per place. [2023-08-30 10:06:25,262 INFO L137 encePairwiseOnDemand]: 273/286 looper letters, 90 selfloop transitions, 52 changer transitions 0/148 dead transitions. [2023-08-30 10:06:25,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 148 transitions, 1677 flow [2023-08-30 10:06:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:06:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:06:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1272 transitions. [2023-08-30 10:06:25,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44475524475524475 [2023-08-30 10:06:25,267 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1272 transitions. [2023-08-30 10:06:25,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1272 transitions. [2023-08-30 10:06:25,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:25,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1272 transitions. [2023-08-30 10:06:25,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.2) internal successors, (1272), 10 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 286.0) internal successors, (3146), 11 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,277 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 286.0) internal successors, (3146), 11 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,277 INFO L175 Difference]: Start difference. First operand has 122 places, 94 transitions, 1011 flow. Second operand 10 states and 1272 transitions. [2023-08-30 10:06:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 148 transitions, 1677 flow [2023-08-30 10:06:25,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 148 transitions, 1552 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-30 10:06:25,290 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 1128 flow [2023-08-30 10:06:25,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1128, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2023-08-30 10:06:25,291 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2023-08-30 10:06:25,291 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 1128 flow [2023-08-30 10:06:25,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:25,291 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 10:06:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 10:06:25,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:25,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1139201064, now seen corresponding path program 1 times [2023-08-30 10:06:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:25,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780874566] [2023-08-30 10:06:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:25,404 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 10:06:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780874566] [2023-08-30 10:06:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780874566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:06:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111982131] [2023-08-30 10:06:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:06:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:06:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:06:25,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 286 [2023-08-30 10:06:25,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 1128 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:25,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 286 [2023-08-30 10:06:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:25,665 INFO L130 PetriNetUnfolder]: 134/523 cut-off events. [2023-08-30 10:06:25,665 INFO L131 PetriNetUnfolder]: For 3201/3203 co-relation queries the response was YES. [2023-08-30 10:06:25,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2618 conditions, 523 events. 134/523 cut-off events. For 3201/3203 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3047 event pairs, 37 based on Foata normal form. 4/526 useless extension candidates. Maximal degree in co-relation 2468. Up to 219 conditions per place. [2023-08-30 10:06:25,668 INFO L137 encePairwiseOnDemand]: 272/286 looper letters, 91 selfloop transitions, 41 changer transitions 0/138 dead transitions. [2023-08-30 10:06:25,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 138 transitions, 1653 flow [2023-08-30 10:06:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:06:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:06:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 936 transitions. [2023-08-30 10:06:25,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2023-08-30 10:06:25,670 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 936 transitions. [2023-08-30 10:06:25,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 936 transitions. [2023-08-30 10:06:25,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:25,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 936 transitions. [2023-08-30 10:06:25,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 286.0) internal successors, (2288), 8 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,675 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 286.0) internal successors, (2288), 8 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,675 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 1128 flow. Second operand 7 states and 936 transitions. [2023-08-30 10:06:25,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 138 transitions, 1653 flow [2023-08-30 10:06:25,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 138 transitions, 1495 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-30 10:06:25,690 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 1246 flow [2023-08-30 10:06:25,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2023-08-30 10:06:25,691 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2023-08-30 10:06:25,691 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 1246 flow [2023-08-30 10:06:25,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:25,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:25,692 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 10:06:25,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 10:06:25,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:25,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 733666007, now seen corresponding path program 2 times [2023-08-30 10:06:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171760182] [2023-08-30 10:06:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:25,903 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 10:06:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171760182] [2023-08-30 10:06:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171760182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967873633] [2023-08-30 10:06:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:06:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:25,905 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 10:06:25,936 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 10:06:26,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:06:26,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:06:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:26,022 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:26,022 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 10:06:26,076 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 10:06:26,137 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 10:06:26,170 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 10:06:26,195 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 10:06:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:26,217 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_523 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_523) c_~p~0.base) c_~p~0.offset) 2147483647)) is different from false [2023-08-30 10:06:26,235 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 Int) (v_ArrVal_523 (Array Int Int))) (or (< (select (select (store (store |c_#memory_int| c_~p~0.base (store (select |c_#memory_int| c_~p~0.base) c_~p~0.offset v_ArrVal_522)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_523) c_~p~0.base) c_~p~0.offset) 2147483647) (< |c_t_funThread1of2ForFork0_#t~post9| (+ v_ArrVal_522 1)))) is different from false [2023-08-30 10:06:26,246 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 Int) (v_ArrVal_523 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~p~0.base))) (or (< (select (select (store (store |c_#memory_int| c_~p~0.base (store .cse0 c_~p~0.offset v_ArrVal_522)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_523) c_~p~0.base) c_~p~0.offset) 2147483647) (< (select .cse0 c_~p~0.offset) (+ v_ArrVal_522 1))))) is different from false [2023-08-30 10:06:26,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:06:26,272 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 10:06:26,275 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 10:06:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 10:06:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967873633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:26,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 10:06:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264187859] [2023-08-30 10:06:26,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:26,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:06:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:06:26,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=213, Unknown=3, NotChecked=96, Total=380 [2023-08-30 10:06:26,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 286 [2023-08-30 10:06:26,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 1246 flow. Second operand has 20 states, 20 states have (on average 94.55) internal successors, (1891), 20 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:26,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:26,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 286 [2023-08-30 10:06:26,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:26,864 INFO L130 PetriNetUnfolder]: 131/507 cut-off events. [2023-08-30 10:06:26,864 INFO L131 PetriNetUnfolder]: For 3158/3162 co-relation queries the response was YES. [2023-08-30 10:06:26,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 507 events. 131/507 cut-off events. For 3158/3162 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2896 event pairs, 29 based on Foata normal form. 8/514 useless extension candidates. Maximal degree in co-relation 2414. Up to 143 conditions per place. [2023-08-30 10:06:26,866 INFO L137 encePairwiseOnDemand]: 272/286 looper letters, 106 selfloop transitions, 46 changer transitions 0/158 dead transitions. [2023-08-30 10:06:26,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 158 transitions, 1851 flow [2023-08-30 10:06:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 10:06:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 10:06:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1672 transitions. [2023-08-30 10:06:26,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3438914027149321 [2023-08-30 10:06:26,868 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1672 transitions. [2023-08-30 10:06:26,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1672 transitions. [2023-08-30 10:06:26,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:26,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1672 transitions. [2023-08-30 10:06:26,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 98.3529411764706) internal successors, (1672), 17 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:26,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 286.0) internal successors, (5148), 18 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:26,876 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 286.0) internal successors, (5148), 18 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:26,876 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 1246 flow. Second operand 17 states and 1672 transitions. [2023-08-30 10:06:26,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 158 transitions, 1851 flow [2023-08-30 10:06:26,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1794 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-30 10:06:26,891 INFO L231 Difference]: Finished difference. Result has 138 places, 106 transitions, 1238 flow [2023-08-30 10:06:26,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1238, PETRI_PLACES=138, PETRI_TRANSITIONS=106} [2023-08-30 10:06:26,892 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2023-08-30 10:06:26,892 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 106 transitions, 1238 flow [2023-08-30 10:06:26,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.55) internal successors, (1891), 20 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:26,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:26,892 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 10:06:26,898 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 10:06:27,097 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,SelfDestructingSolverStorable21 [2023-08-30 10:06:27,098 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:27,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1139201073, now seen corresponding path program 1 times [2023-08-30 10:06:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894996135] [2023-08-30 10:06:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:27,198 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 10:06:27,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:27,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894996135] [2023-08-30 10:06:27,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894996135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:27,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:27,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:06:27,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190922507] [2023-08-30 10:06:27,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:06:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:06:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:06:27,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 286 [2023-08-30 10:06:27,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 106 transitions, 1238 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:27,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:27,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 286 [2023-08-30 10:06:27,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:27,391 INFO L130 PetriNetUnfolder]: 130/510 cut-off events. [2023-08-30 10:06:27,392 INFO L131 PetriNetUnfolder]: For 3532/3536 co-relation queries the response was YES. [2023-08-30 10:06:27,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 510 events. 130/510 cut-off events. For 3532/3536 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2977 event pairs, 78 based on Foata normal form. 5/514 useless extension candidates. Maximal degree in co-relation 2478. Up to 363 conditions per place. [2023-08-30 10:06:27,395 INFO L137 encePairwiseOnDemand]: 276/286 looper letters, 88 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2023-08-30 10:06:27,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 118 transitions, 1532 flow [2023-08-30 10:06:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:06:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:06:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-30 10:06:27,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46293706293706294 [2023-08-30 10:06:27,398 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-30 10:06:27,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-30 10:06:27,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:27,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-30 10:06:27,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 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 10:06:27,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:27,401 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:27,401 INFO L175 Difference]: Start difference. First operand has 138 places, 106 transitions, 1238 flow. Second operand 5 states and 662 transitions. [2023-08-30 10:06:27,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 118 transitions, 1532 flow [2023-08-30 10:06:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 118 transitions, 1412 flow, removed 10 selfloop flow, removed 15 redundant places. [2023-08-30 10:06:27,416 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 1221 flow [2023-08-30 10:06:27,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1221, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2023-08-30 10:06:27,416 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2023-08-30 10:06:27,417 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 1221 flow [2023-08-30 10:06:27,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:27,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:27,417 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 10:06:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 10:06:27,418 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:27,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash -190381393, now seen corresponding path program 2 times [2023-08-30 10:06:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104956483] [2023-08-30 10:06:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:27,650 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 10:06:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104956483] [2023-08-30 10:06:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104956483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:27,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820375514] [2023-08-30 10:06:27,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:06:27,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:27,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:27,652 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 10:06:27,681 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 10:06:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:06:27,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:06:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:27,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:27,770 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:27,773 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 10:06:27,822 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 10:06:27,855 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 10:06:27,892 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 10:06:27,921 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 10:06:27,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:27,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820375514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:27,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:27,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 10:06:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438189201] [2023-08-30 10:06:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:06:27,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:06:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:06:28,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 286 [2023-08-30 10:06:28,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 1221 flow. Second operand has 7 states, 7 states have (on average 123.57142857142857) internal successors, (865), 7 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:28,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:28,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 286 [2023-08-30 10:06:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:28,254 INFO L130 PetriNetUnfolder]: 129/507 cut-off events. [2023-08-30 10:06:28,254 INFO L131 PetriNetUnfolder]: For 3026/3040 co-relation queries the response was YES. [2023-08-30 10:06:28,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 507 events. 129/507 cut-off events. For 3026/3040 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2929 event pairs, 43 based on Foata normal form. 3/509 useless extension candidates. Maximal degree in co-relation 2448. Up to 177 conditions per place. [2023-08-30 10:06:28,256 INFO L137 encePairwiseOnDemand]: 276/286 looper letters, 103 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2023-08-30 10:06:28,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 138 transitions, 1626 flow [2023-08-30 10:06:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 10:06:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 10:06:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1414 transitions. [2023-08-30 10:06:28,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494596312778131 [2023-08-30 10:06:28,258 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1414 transitions. [2023-08-30 10:06:28,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1414 transitions. [2023-08-30 10:06:28,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:28,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1414 transitions. [2023-08-30 10:06:28,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 128.54545454545453) internal successors, (1414), 11 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:28,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 286.0) internal successors, (3432), 12 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:28,263 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 286.0) internal successors, (3432), 12 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:28,263 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 1221 flow. Second operand 11 states and 1414 transitions. [2023-08-30 10:06:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 138 transitions, 1626 flow [2023-08-30 10:06:28,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 138 transitions, 1548 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-30 10:06:28,280 INFO L231 Difference]: Finished difference. Result has 131 places, 106 transitions, 1189 flow [2023-08-30 10:06:28,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1189, PETRI_PLACES=131, PETRI_TRANSITIONS=106} [2023-08-30 10:06:28,281 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2023-08-30 10:06:28,281 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 106 transitions, 1189 flow [2023-08-30 10:06:28,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.57142857142857) internal successors, (865), 7 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:28,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:28,281 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 10:06:28,291 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 10:06:28,486 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,SelfDestructingSolverStorable23 [2023-08-30 10:06:28,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:28,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash 412851414, now seen corresponding path program 2 times [2023-08-30 10:06:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:28,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699611870] [2023-08-30 10:06:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:28,717 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 10:06:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:28,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699611870] [2023-08-30 10:06:28,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699611870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:28,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528368929] [2023-08-30 10:06:28,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:06:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:28,719 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 10:06:28,722 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 10:06:28,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:06:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:06:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:28,829 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:28,830 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 10:06:28,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:06:28,955 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 10:06:28,995 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 10:06:29,016 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 10:06:29,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528368929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:29,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-08-30 10:06:29,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787439240] [2023-08-30 10:06:29,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:29,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:06:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:06:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:06:29,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 286 [2023-08-30 10:06:29,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 106 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:29,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 286 [2023-08-30 10:06:29,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:29,410 INFO L130 PetriNetUnfolder]: 129/510 cut-off events. [2023-08-30 10:06:29,410 INFO L131 PetriNetUnfolder]: For 3041/3052 co-relation queries the response was YES. [2023-08-30 10:06:29,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 510 events. 129/510 cut-off events. For 3041/3052 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2957 event pairs, 35 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 2421. Up to 179 conditions per place. [2023-08-30 10:06:29,413 INFO L137 encePairwiseOnDemand]: 274/286 looper letters, 107 selfloop transitions, 32 changer transitions 0/145 dead transitions. [2023-08-30 10:06:29,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 145 transitions, 1722 flow [2023-08-30 10:06:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:06:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:06:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1140 transitions. [2023-08-30 10:06:29,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428904428904429 [2023-08-30 10:06:29,415 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1140 transitions. [2023-08-30 10:06:29,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1140 transitions. [2023-08-30 10:06:29,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:29,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1140 transitions. [2023-08-30 10:06:29,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.66666666666667) internal successors, (1140), 9 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,420 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,420 INFO L175 Difference]: Start difference. First operand has 131 places, 106 transitions, 1189 flow. Second operand 9 states and 1140 transitions. [2023-08-30 10:06:29,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 145 transitions, 1722 flow [2023-08-30 10:06:29,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 145 transitions, 1658 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-30 10:06:29,433 INFO L231 Difference]: Finished difference. Result has 134 places, 108 transitions, 1236 flow [2023-08-30 10:06:29,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1236, PETRI_PLACES=134, PETRI_TRANSITIONS=108} [2023-08-30 10:06:29,434 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2023-08-30 10:06:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 108 transitions, 1236 flow [2023-08-30 10:06:29,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:29,435 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 10:06:29,441 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 10:06:29,640 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,SelfDestructingSolverStorable24 [2023-08-30 10:06:29,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:29,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1781603028, now seen corresponding path program 1 times [2023-08-30 10:06:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:29,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641134558] [2023-08-30 10:06:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:29,776 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 10:06:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:29,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641134558] [2023-08-30 10:06:29,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641134558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:29,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:29,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:06:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772796127] [2023-08-30 10:06:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:29,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:29,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:06:29,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 286 [2023-08-30 10:06:29,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 108 transitions, 1236 flow. Second operand has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:29,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:29,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 286 [2023-08-30 10:06:29,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:30,083 INFO L130 PetriNetUnfolder]: 131/528 cut-off events. [2023-08-30 10:06:30,083 INFO L131 PetriNetUnfolder]: For 3304/3313 co-relation queries the response was YES. [2023-08-30 10:06:30,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 528 events. 131/528 cut-off events. For 3304/3313 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3152 event pairs, 50 based on Foata normal form. 6/533 useless extension candidates. Maximal degree in co-relation 2571. Up to 281 conditions per place. [2023-08-30 10:06:30,086 INFO L137 encePairwiseOnDemand]: 275/286 looper letters, 87 selfloop transitions, 24 changer transitions 22/139 dead transitions. [2023-08-30 10:06:30,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 139 transitions, 1742 flow [2023-08-30 10:06:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:06:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:06:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1126 transitions. [2023-08-30 10:06:30,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745143745143744 [2023-08-30 10:06:30,088 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1126 transitions. [2023-08-30 10:06:30,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1126 transitions. [2023-08-30 10:06:30,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:30,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1126 transitions. [2023-08-30 10:06:30,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.11111111111111) internal successors, (1126), 9 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,092 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 286.0) internal successors, (2860), 10 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,092 INFO L175 Difference]: Start difference. First operand has 134 places, 108 transitions, 1236 flow. Second operand 9 states and 1126 transitions. [2023-08-30 10:06:30,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 139 transitions, 1742 flow [2023-08-30 10:06:30,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 1685 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 10:06:30,106 INFO L231 Difference]: Finished difference. Result has 141 places, 101 transitions, 1164 flow [2023-08-30 10:06:30,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1164, PETRI_PLACES=141, PETRI_TRANSITIONS=101} [2023-08-30 10:06:30,106 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2023-08-30 10:06:30,107 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 101 transitions, 1164 flow [2023-08-30 10:06:30,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:30,107 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 10:06:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 10:06:30,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:30,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1927654618, now seen corresponding path program 1 times [2023-08-30 10:06:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742742428] [2023-08-30 10:06:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:30,217 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 10:06:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:30,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742742428] [2023-08-30 10:06:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742742428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:30,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:30,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:06:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454790725] [2023-08-30 10:06:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:30,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:06:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:06:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:06:30,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 286 [2023-08-30 10:06:30,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 101 transitions, 1164 flow. Second operand has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:30,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 286 [2023-08-30 10:06:30,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:30,533 INFO L130 PetriNetUnfolder]: 125/489 cut-off events. [2023-08-30 10:06:30,533 INFO L131 PetriNetUnfolder]: For 3147/3151 co-relation queries the response was YES. [2023-08-30 10:06:30,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 489 events. 125/489 cut-off events. For 3147/3151 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2853 event pairs, 77 based on Foata normal form. 4/492 useless extension candidates. Maximal degree in co-relation 2386. Up to 328 conditions per place. [2023-08-30 10:06:30,536 INFO L137 encePairwiseOnDemand]: 275/286 looper letters, 64 selfloop transitions, 21 changer transitions 23/114 dead transitions. [2023-08-30 10:06:30,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 114 transitions, 1451 flow [2023-08-30 10:06:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:06:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:06:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1239 transitions. [2023-08-30 10:06:30,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332167832167832 [2023-08-30 10:06:30,538 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1239 transitions. [2023-08-30 10:06:30,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1239 transitions. [2023-08-30 10:06:30,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:30,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1239 transitions. [2023-08-30 10:06:30,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.9) internal successors, (1239), 10 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 286.0) internal successors, (3146), 11 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,542 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 286.0) internal successors, (3146), 11 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,543 INFO L175 Difference]: Start difference. First operand has 141 places, 101 transitions, 1164 flow. Second operand 10 states and 1239 transitions. [2023-08-30 10:06:30,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 114 transitions, 1451 flow [2023-08-30 10:06:30,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 114 transitions, 1376 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-08-30 10:06:30,555 INFO L231 Difference]: Finished difference. Result has 142 places, 82 transitions, 937 flow [2023-08-30 10:06:30,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=937, PETRI_PLACES=142, PETRI_TRANSITIONS=82} [2023-08-30 10:06:30,556 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 93 predicate places. [2023-08-30 10:06:30,557 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 82 transitions, 937 flow [2023-08-30 10:06:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:30,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:30,557 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 10:06:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 10:06:30,557 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:30,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -919514846, now seen corresponding path program 2 times [2023-08-30 10:06:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:30,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248396659] [2023-08-30 10:06:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:30,809 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 10:06:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248396659] [2023-08-30 10:06:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248396659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:30,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770061567] [2023-08-30 10:06:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:06:30,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:30,811 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 10:06:30,813 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 10:06:30,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:06:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:06:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:30,932 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:30,933 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 10:06:30,996 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 10:06:31,027 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 10:06:31,088 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 10:06:31,113 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 10:06:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:06:31,180 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_802 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_802) c_~p~0.base) c_~p~0.offset)))) is different from false [2023-08-30 10:06:31,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:06:31,197 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 10:06:31,200 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 10:06:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 10:06:31,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770061567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:06:31,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:06:31,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-30 10:06:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794727333] [2023-08-30 10:06:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:06:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 10:06:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 10:06:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=341, Unknown=1, NotChecked=38, Total=462 [2023-08-30 10:06:31,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 286 [2023-08-30 10:06:31,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 82 transitions, 937 flow. Second operand has 22 states, 22 states have (on average 88.86363636363636) internal successors, (1955), 22 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:31,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:31,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 286 [2023-08-30 10:06:31,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:31,887 INFO L130 PetriNetUnfolder]: 119/431 cut-off events. [2023-08-30 10:06:31,887 INFO L131 PetriNetUnfolder]: For 2836/2845 co-relation queries the response was YES. [2023-08-30 10:06:31,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2234 conditions, 431 events. 119/431 cut-off events. For 2836/2845 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2316 event pairs, 24 based on Foata normal form. 5/435 useless extension candidates. Maximal degree in co-relation 2198. Up to 121 conditions per place. [2023-08-30 10:06:31,890 INFO L137 encePairwiseOnDemand]: 274/286 looper letters, 34 selfloop transitions, 5 changer transitions 74/119 dead transitions. [2023-08-30 10:06:31,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 119 transitions, 1395 flow [2023-08-30 10:06:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 10:06:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 10:06:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1452 transitions. [2023-08-30 10:06:31,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173076923076923 [2023-08-30 10:06:31,892 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1452 transitions. [2023-08-30 10:06:31,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1452 transitions. [2023-08-30 10:06:31,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:31,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1452 transitions. [2023-08-30 10:06:31,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.75) internal successors, (1452), 16 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:31,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 286.0) internal successors, (4862), 17 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:31,898 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 286.0) internal successors, (4862), 17 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:31,899 INFO L175 Difference]: Start difference. First operand has 142 places, 82 transitions, 937 flow. Second operand 16 states and 1452 transitions. [2023-08-30 10:06:31,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 119 transitions, 1395 flow [2023-08-30 10:06:31,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 119 transitions, 1221 flow, removed 14 selfloop flow, removed 21 redundant places. [2023-08-30 10:06:31,908 INFO L231 Difference]: Finished difference. Result has 126 places, 41 transitions, 340 flow [2023-08-30 10:06:31,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=340, PETRI_PLACES=126, PETRI_TRANSITIONS=41} [2023-08-30 10:06:31,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 77 predicate places. [2023-08-30 10:06:31,909 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 41 transitions, 340 flow [2023-08-30 10:06:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.86363636363636) internal successors, (1955), 22 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:31,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:31,910 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 10:06:31,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 10:06:32,114 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 10:06:32,115 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-08-30 10:06:32,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -31993533, now seen corresponding path program 2 times [2023-08-30 10:06:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762092565] [2023-08-30 10:06:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:32,424 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 10:06:32,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:32,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762092565] [2023-08-30 10:06:32,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762092565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:06:32,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535989915] [2023-08-30 10:06:32,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:06:32,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:06:32,429 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 10:06:32,432 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 10:06:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:06:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:06:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:06:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:06:32,568 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:06:32,568 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 10:06:32,645 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 10:06:32,713 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 10:06:32,745 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 10:06:32,765 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 10:06:32,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:06:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535989915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:32,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:06:32,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 10:06:32,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322216189] [2023-08-30 10:06:32,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:32,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:06:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:06:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-30 10:06:32,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 286 [2023-08-30 10:06:32,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 41 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 118.625) internal successors, (949), 8 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:32,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:32,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 286 [2023-08-30 10:06:32,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:33,042 INFO L130 PetriNetUnfolder]: 27/121 cut-off events. [2023-08-30 10:06:33,042 INFO L131 PetriNetUnfolder]: For 480/482 co-relation queries the response was YES. [2023-08-30 10:06:33,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 121 events. 27/121 cut-off events. For 480/482 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 335 event pairs, 14 based on Foata normal form. 2/123 useless extension candidates. Maximal degree in co-relation 514. Up to 49 conditions per place. [2023-08-30 10:06:33,043 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-30 10:06:33,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 45 transitions, 437 flow [2023-08-30 10:06:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 10:06:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 10:06:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 956 transitions. [2023-08-30 10:06:33,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178321678321678 [2023-08-30 10:06:33,044 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 956 transitions. [2023-08-30 10:06:33,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 956 transitions. [2023-08-30 10:06:33,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:33,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 956 transitions. [2023-08-30 10:06:33,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:33,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 286.0) internal successors, (2574), 9 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:33,048 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 286.0) internal successors, (2574), 9 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:33,048 INFO L175 Difference]: Start difference. First operand has 126 places, 41 transitions, 340 flow. Second operand 8 states and 956 transitions. [2023-08-30 10:06:33,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 45 transitions, 437 flow [2023-08-30 10:06:33,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 45 transitions, 318 flow, removed 5 selfloop flow, removed 33 redundant places. [2023-08-30 10:06:33,050 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-30 10:06:33,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=63, PETRI_TRANSITIONS=0} [2023-08-30 10:06:33,051 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2023-08-30 10:06:33,051 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-30 10:06:33,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 118.625) internal successors, (949), 8 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:33,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 14 remaining) [2023-08-30 10:06:33,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 14 remaining) [2023-08-30 10:06:33,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 14 remaining) [2023-08-30 10:06:33,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 14 remaining) [2023-08-30 10:06:33,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 14 remaining) [2023-08-30 10:06:33,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 14 remaining) [2023-08-30 10:06:33,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 10:06:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:06:33,258 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:33,258 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:06:33,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,279 INFO L130 PetriNetUnfolder]: 24/221 cut-off events. [2023-08-30 10:06:33,280 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 10:06:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 221 events. 24/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 649 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-08-30 10:06:33,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:33,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 152 transitions, 316 flow [2023-08-30 10:06:33,298 INFO L130 PetriNetUnfolder]: 24/221 cut-off events. [2023-08-30 10:06:33,299 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 10:06:33,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 221 events. 24/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 649 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-08-30 10:06:33,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 9680 [2023-08-30 10:06:36,062 INFO L134 LiptonReduction]: Checked pairs total: 21157 [2023-08-30 10:06:36,063 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 10:06:36,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:06:36,066 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:36,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:06:36,070 INFO L130 PetriNetUnfolder]: 10/55 cut-off events. [2023-08-30 10:06:36,070 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 10:06:36,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:36,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 10:06:36,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:06:36,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:36,071 INFO L85 PathProgramCache]: Analyzing trace with hash -154621128, now seen corresponding path program 1 times [2023-08-30 10:06:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:36,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296898275] [2023-08-30 10:06:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:36,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:06:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:06:36,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:06:36,096 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:06:36,096 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:06:36,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 10:06:36,096 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:06:36,097 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:06:36,097 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:06:36,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 10:06:36,114 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 10:06:36,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,140 INFO L130 PetriNetUnfolder]: 34/301 cut-off events. [2023-08-30 10:06:36,140 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:06:36,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 301 events. 34/301 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 954 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-30 10:06:36,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:06:36,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:06:36,168 INFO L130 PetriNetUnfolder]: 34/301 cut-off events. [2023-08-30 10:06:36,168 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:06:36,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 301 events. 34/301 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 954 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-30 10:06:36,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-30 10:06:39,075 INFO L134 LiptonReduction]: Checked pairs total: 45565 [2023-08-30 10:06:39,075 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 10:06:39,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:06:39,076 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:06:39,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-30 10:06:39,078 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 10:06:39,078 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:06:39,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:39,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:06:39,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:06:39,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1331357812, now seen corresponding path program 1 times [2023-08-30 10:06:39,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:39,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257607271] [2023-08-30 10:06:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:39,097 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 10:06:39,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257607271] [2023-08-30 10:06:39,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257607271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:39,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:39,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:06:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788895765] [2023-08-30 10:06:39,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:39,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:39,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:39,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:39,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 354 [2023-08-30 10:06:39,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:39,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:39,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 354 [2023-08-30 10:06:39,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:44,814 INFO L130 PetriNetUnfolder]: 77017/108132 cut-off events. [2023-08-30 10:06:44,815 INFO L131 PetriNetUnfolder]: For 1261/1261 co-relation queries the response was YES. [2023-08-30 10:06:45,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215448 conditions, 108132 events. 77017/108132 cut-off events. For 1261/1261 co-relation queries the response was YES. Maximal size of possible extension queue 3962. Compared 807893 event pairs, 49933 based on Foata normal form. 12494/86932 useless extension candidates. Maximal degree in co-relation 21019. Up to 106359 conditions per place. [2023-08-30 10:06:45,372 INFO L137 encePairwiseOnDemand]: 329/354 looper letters, 64 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-30 10:06:45,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 301 flow [2023-08-30 10:06:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-30 10:06:45,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5499058380414312 [2023-08-30 10:06:45,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-30 10:06:45,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-30 10:06:45,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:45,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-30 10:06:45,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:45,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:45,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:45,377 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 181 flow. Second operand 3 states and 584 transitions. [2023-08-30 10:06:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 301 flow [2023-08-30 10:06:45,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 295 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 10:06:45,379 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 151 flow [2023-08-30 10:06:45,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-30 10:06:45,380 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-30 10:06:45,380 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 151 flow [2023-08-30 10:06:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:45,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:45,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:06:45,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 10:06:45,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:06:45,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash -456945771, now seen corresponding path program 1 times [2023-08-30 10:06:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728905974] [2023-08-30 10:06:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:45,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:45,429 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 10:06:45,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728905974] [2023-08-30 10:06:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728905974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:45,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:45,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483025020] [2023-08-30 10:06:45,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:45,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:06:45,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:06:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:06:45,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 354 [2023-08-30 10:06:45,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:45,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:45,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 354 [2023-08-30 10:06:45,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:50,663 INFO L130 PetriNetUnfolder]: 73335/101843 cut-off events. [2023-08-30 10:06:50,663 INFO L131 PetriNetUnfolder]: For 6151/6151 co-relation queries the response was YES. [2023-08-30 10:06:50,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214986 conditions, 101843 events. 73335/101843 cut-off events. For 6151/6151 co-relation queries the response was YES. Maximal size of possible extension queue 4029. Compared 742163 event pairs, 35728 based on Foata normal form. 0/73449 useless extension candidates. Maximal degree in co-relation 214902. Up to 99949 conditions per place. [2023-08-30 10:06:51,263 INFO L137 encePairwiseOnDemand]: 343/354 looper letters, 77 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-30 10:06:51,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 406 flow [2023-08-30 10:06:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:06:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:06:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 719 transitions. [2023-08-30 10:06:51,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.507768361581921 [2023-08-30 10:06:51,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 719 transitions. [2023-08-30 10:06:51,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 719 transitions. [2023-08-30 10:06:51,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:51,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 719 transitions. [2023-08-30 10:06:51,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:51,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:51,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:51,268 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 151 flow. Second operand 4 states and 719 transitions. [2023-08-30 10:06:51,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 406 flow [2023-08-30 10:06:51,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:06:51,277 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 220 flow [2023-08-30 10:06:51,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-30 10:06:51,278 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-30 10:06:51,278 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 220 flow [2023-08-30 10:06:51,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:51,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:51,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:06:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 10:06:51,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:06:51,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash -478728982, now seen corresponding path program 1 times [2023-08-30 10:06:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:51,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514162358] [2023-08-30 10:06:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:51,302 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 10:06:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514162358] [2023-08-30 10:06:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514162358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:51,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:51,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543341532] [2023-08-30 10:06:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:51,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 354 [2023-08-30 10:06:51,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:51,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:51,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 354 [2023-08-30 10:06:51,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:06:56,781 INFO L130 PetriNetUnfolder]: 65748/91614 cut-off events. [2023-08-30 10:06:56,781 INFO L131 PetriNetUnfolder]: For 26101/27088 co-relation queries the response was YES. [2023-08-30 10:06:56,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218537 conditions, 91614 events. 65748/91614 cut-off events. For 26101/27088 co-relation queries the response was YES. Maximal size of possible extension queue 3576. Compared 660159 event pairs, 62680 based on Foata normal form. 0/72509 useless extension candidates. Maximal degree in co-relation 151964. Up to 90975 conditions per place. [2023-08-30 10:06:57,204 INFO L137 encePairwiseOnDemand]: 352/354 looper letters, 58 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 10:06:57,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 334 flow [2023-08-30 10:06:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:06:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:06:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 10:06:57,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094161958568738 [2023-08-30 10:06:57,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 10:06:57,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 10:06:57,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:06:57,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 10:06:57,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:57,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:57,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:57,207 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 220 flow. Second operand 3 states and 541 transitions. [2023-08-30 10:06:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 334 flow [2023-08-30 10:06:57,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:06:57,226 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 218 flow [2023-08-30 10:06:57,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-08-30 10:06:57,227 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-30 10:06:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 218 flow [2023-08-30 10:06:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:57,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:06:57,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:06:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 10:06:57,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:06:57,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:06:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -478728945, now seen corresponding path program 1 times [2023-08-30 10:06:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:06:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683913189] [2023-08-30 10:06:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:06:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:06:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:06:57,245 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 10:06:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:06:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683913189] [2023-08-30 10:06:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683913189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:06:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:06:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:06:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324692908] [2023-08-30 10:06:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:06:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:06:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:06:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:06:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:06:57,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 354 [2023-08-30 10:06:57,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:06:57,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:06:57,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 354 [2023-08-30 10:06:57,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:01,774 INFO L130 PetriNetUnfolder]: 58161/80811 cut-off events. [2023-08-30 10:07:01,775 INFO L131 PetriNetUnfolder]: For 19344/19613 co-relation queries the response was YES. [2023-08-30 10:07:01,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191888 conditions, 80811 events. 58161/80811 cut-off events. For 19344/19613 co-relation queries the response was YES. Maximal size of possible extension queue 3138. Compared 591837 event pairs, 12993 based on Foata normal form. 3/66668 useless extension candidates. Maximal degree in co-relation 191873. Up to 62407 conditions per place. [2023-08-30 10:07:02,128 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 97 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-08-30 10:07:02,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 541 flow [2023-08-30 10:07:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:07:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:07:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 10:07:02,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433145009416196 [2023-08-30 10:07:02,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 10:07:02,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 10:07:02,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:07:02,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 10:07:02,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 10:07:02,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:02,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:02,131 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 218 flow. Second operand 3 states and 577 transitions. [2023-08-30 10:07:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 541 flow [2023-08-30 10:07:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:07:02,166 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 229 flow [2023-08-30 10:07:02,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-08-30 10:07:02,167 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-30 10:07:02,167 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 229 flow [2023-08-30 10:07:02,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:02,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:07:02,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:07:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 10:07:02,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:07:02,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:07:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1257946311, now seen corresponding path program 1 times [2023-08-30 10:07:02,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:07:02,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631741064] [2023-08-30 10:07:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:07:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:02,206 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 10:07:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:07:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631741064] [2023-08-30 10:07:02,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631741064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:07:02,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:07:02,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:07:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598550013] [2023-08-30 10:07:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:07:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:07:02,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:07:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:07:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:07:02,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 354 [2023-08-30 10:07:02,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:02,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:07:02,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 354 [2023-08-30 10:07:02,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:08,504 INFO L130 PetriNetUnfolder]: 69717/102248 cut-off events. [2023-08-30 10:07:08,505 INFO L131 PetriNetUnfolder]: For 50442/50998 co-relation queries the response was YES. [2023-08-30 10:07:08,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253263 conditions, 102248 events. 69717/102248 cut-off events. For 50442/50998 co-relation queries the response was YES. Maximal size of possible extension queue 3999. Compared 811954 event pairs, 30755 based on Foata normal form. 42/87896 useless extension candidates. Maximal degree in co-relation 253246. Up to 74255 conditions per place. [2023-08-30 10:07:09,019 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 84 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2023-08-30 10:07:09,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 588 flow [2023-08-30 10:07:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:07:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:07:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-30 10:07:09,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414312617702448 [2023-08-30 10:07:09,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-30 10:07:09,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-30 10:07:09,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:07:09,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-30 10:07:09,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:09,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:09,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:09,022 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 229 flow. Second operand 3 states and 575 transitions. [2023-08-30 10:07:09,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 588 flow [2023-08-30 10:07:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 581 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:07:09,067 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 387 flow [2023-08-30 10:07:09,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-30 10:07:09,067 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 12 predicate places. [2023-08-30 10:07:09,067 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 387 flow [2023-08-30 10:07:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:09,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:07:09,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:07:09,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 10:07:09,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:07:09,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:07:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1257946355, now seen corresponding path program 1 times [2023-08-30 10:07:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:07:09,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718492453] [2023-08-30 10:07:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:07:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:09,164 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 10:07:09,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:07:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718492453] [2023-08-30 10:07:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718492453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:07:09,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:07:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:07:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891768880] [2023-08-30 10:07:09,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:07:09,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:07:09,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:07:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:07:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:07:09,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2023-08-30 10:07:09,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:09,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:07:09,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2023-08-30 10:07:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:18,262 INFO L130 PetriNetUnfolder]: 92004/136703 cut-off events. [2023-08-30 10:07:18,262 INFO L131 PetriNetUnfolder]: For 147278/147788 co-relation queries the response was YES. [2023-08-30 10:07:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378615 conditions, 136703 events. 92004/136703 cut-off events. For 147278/147788 co-relation queries the response was YES. Maximal size of possible extension queue 5526. Compared 1137295 event pairs, 25958 based on Foata normal form. 4852/140723 useless extension candidates. Maximal degree in co-relation 378595. Up to 86339 conditions per place. [2023-08-30 10:07:19,257 INFO L137 encePairwiseOnDemand]: 331/354 looper letters, 205 selfloop transitions, 53 changer transitions 0/266 dead transitions. [2023-08-30 10:07:19,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 266 transitions, 1661 flow [2023-08-30 10:07:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:07:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:07:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1594 transitions. [2023-08-30 10:07:19,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003138731952291 [2023-08-30 10:07:19,259 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1594 transitions. [2023-08-30 10:07:19,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1594 transitions. [2023-08-30 10:07:19,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:07:19,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1594 transitions. [2023-08-30 10:07:19,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.11111111111111) internal successors, (1594), 9 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:19,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 354.0) internal successors, (3540), 10 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:19,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 354.0) internal successors, (3540), 10 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:19,263 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 387 flow. Second operand 9 states and 1594 transitions. [2023-08-30 10:07:19,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 266 transitions, 1661 flow [2023-08-30 10:07:19,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 266 transitions, 1565 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:07:19,459 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 895 flow [2023-08-30 10:07:19,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=895, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2023-08-30 10:07:19,459 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 24 predicate places. [2023-08-30 10:07:19,460 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 895 flow [2023-08-30 10:07:19,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:19,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:07:19,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:07:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 10:07:19,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:07:19,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:07:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash -75168615, now seen corresponding path program 1 times [2023-08-30 10:07:19,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:07:19,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358939877] [2023-08-30 10:07:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:07:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:19,557 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 10:07:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:07:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358939877] [2023-08-30 10:07:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358939877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:07:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438546586] [2023-08-30 10:07:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:07:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:07:19,561 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 10:07:19,567 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 10:07:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 10:07:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:07:19,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:07:19,670 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 10:07:19,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:07:19,722 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 10:07:19,733 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 10:07:19,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:07:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438546586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:07:19,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:07:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 10:07:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234063387] [2023-08-30 10:07:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:07:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:07:19,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:07:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:07:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 10:07:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 354 [2023-08-30 10:07:19,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 895 flow. Second operand has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:19,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:07:19,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 354 [2023-08-30 10:07:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:28,941 INFO L130 PetriNetUnfolder]: 82389/120366 cut-off events. [2023-08-30 10:07:28,941 INFO L131 PetriNetUnfolder]: For 286477/291479 co-relation queries the response was YES. [2023-08-30 10:07:29,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408222 conditions, 120366 events. 82389/120366 cut-off events. For 286477/291479 co-relation queries the response was YES. Maximal size of possible extension queue 4786. Compared 957202 event pairs, 56956 based on Foata normal form. 1638/120900 useless extension candidates. Maximal degree in co-relation 408196. Up to 102179 conditions per place. [2023-08-30 10:07:29,752 INFO L137 encePairwiseOnDemand]: 349/354 looper letters, 178 selfloop transitions, 4 changer transitions 0/190 dead transitions. [2023-08-30 10:07:29,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 190 transitions, 1721 flow [2023-08-30 10:07:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:07:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:07:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-08-30 10:07:29,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028248587570622 [2023-08-30 10:07:29,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-08-30 10:07:29,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-08-30 10:07:29,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:07:29,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-08-30 10:07:29,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:29,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:29,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:29,756 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 895 flow. Second operand 4 states and 712 transitions. [2023-08-30 10:07:29,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 190 transitions, 1721 flow [2023-08-30 10:07:30,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 190 transitions, 1682 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 10:07:30,287 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 814 flow [2023-08-30 10:07:30,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=814, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2023-08-30 10:07:30,288 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 22 predicate places. [2023-08-30 10:07:30,288 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 814 flow [2023-08-30 10:07:30,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:30,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:07:30,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:07:30,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 10:07:30,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 10:07:30,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:07:30,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:07:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash -75168659, now seen corresponding path program 1 times [2023-08-30 10:07:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:07:30,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50803846] [2023-08-30 10:07:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:07:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:30,597 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 10:07:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:07:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50803846] [2023-08-30 10:07:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50803846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:07:30,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004445858] [2023-08-30 10:07:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:30,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:07:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:07:30,601 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 10:07:30,629 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 10:07:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:30,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:07:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:07:30,729 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:07:30,730 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 10:07:30,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:07:31,013 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 10:07:31,040 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 10:07:31,058 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 10:07:31,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:07:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004445858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:07:31,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:07:31,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:07:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655523824] [2023-08-30 10:07:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:07:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:07:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:07:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:07:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:07:31,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 354 [2023-08-30 10:07:31,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 814 flow. Second operand has 6 states, 6 states have (on average 154.66666666666666) internal successors, (928), 6 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:31,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:07:31,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 354 [2023-08-30 10:07:31,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:39,875 INFO L130 PetriNetUnfolder]: 80337/117154 cut-off events. [2023-08-30 10:07:39,876 INFO L131 PetriNetUnfolder]: For 261578/262144 co-relation queries the response was YES. [2023-08-30 10:07:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398745 conditions, 117154 events. 80337/117154 cut-off events. For 261578/262144 co-relation queries the response was YES. Maximal size of possible extension queue 4710. Compared 918749 event pairs, 31958 based on Foata normal form. 484/117025 useless extension candidates. Maximal degree in co-relation 398718. Up to 108641 conditions per place. [2023-08-30 10:07:40,641 INFO L137 encePairwiseOnDemand]: 344/354 looper letters, 168 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2023-08-30 10:07:40,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 212 transitions, 1804 flow [2023-08-30 10:07:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:07:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:07:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-08-30 10:07:40,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891713747645951 [2023-08-30 10:07:40,643 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-08-30 10:07:40,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-08-30 10:07:40,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:07:40,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-08-30 10:07:40,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:40,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 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 10:07:40,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 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 10:07:40,646 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 814 flow. Second operand 6 states and 1039 transitions. [2023-08-30 10:07:40,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 212 transitions, 1804 flow [2023-08-30 10:07:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 212 transitions, 1798 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:07:41,732 INFO L231 Difference]: Finished difference. Result has 94 places, 142 transitions, 1159 flow [2023-08-30 10:07:41,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1159, PETRI_PLACES=94, PETRI_TRANSITIONS=142} [2023-08-30 10:07:41,732 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2023-08-30 10:07:41,733 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 142 transitions, 1159 flow [2023-08-30 10:07:41,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.66666666666666) internal successors, (928), 6 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:41,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:07:41,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:07:41,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 10:07:41,933 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,SelfDestructingSolverStorable37 [2023-08-30 10:07:41,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:07:41,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:07:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 586938419, now seen corresponding path program 1 times [2023-08-30 10:07:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:07:41,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693388916] [2023-08-30 10:07:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:07:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:42,021 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 10:07:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:07:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693388916] [2023-08-30 10:07:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693388916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:07:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212510172] [2023-08-30 10:07:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:07:42,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:07:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:07:42,024 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 10:07:42,046 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 10:07:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:07:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:07:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:07:42,139 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:07:42,139 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 10:07:42,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:07:42,183 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 10:07:42,248 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 10:07:42,269 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 10:07:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:07:42,329 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 10:07:42,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212510172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:07:42,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:07:42,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:07:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521387705] [2023-08-30 10:07:42,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:07:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:07:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:07:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:07:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:07:42,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2023-08-30 10:07:42,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 142 transitions, 1159 flow. Second operand has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:07:42,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:07:42,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2023-08-30 10:07:42,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:07:43,357 WARN L839 $PredicateComparison]: unable to prove that (and (< 0 (+ 2147483649 |c_t_funThread2of3ForFork0_#t~post6|)) (forall ((v_ArrVal_1042 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1042) c_~p~0.base) c_~p~0.offset) 2147483649)))) is different from false [2023-08-30 10:08:00,003 INFO L130 PetriNetUnfolder]: 141406/206648 cut-off events. [2023-08-30 10:08:00,003 INFO L131 PetriNetUnfolder]: For 498801/501261 co-relation queries the response was YES. [2023-08-30 10:08:00,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694778 conditions, 206648 events. 141406/206648 cut-off events. For 498801/501261 co-relation queries the response was YES. Maximal size of possible extension queue 7986. Compared 1723399 event pairs, 14834 based on Foata normal form. 9248/215411 useless extension candidates. Maximal degree in co-relation 694749. Up to 57878 conditions per place. [2023-08-30 10:08:01,474 INFO L137 encePairwiseOnDemand]: 321/354 looper letters, 576 selfloop transitions, 479 changer transitions 0/1063 dead transitions. [2023-08-30 10:08:01,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 1063 transitions, 9514 flow [2023-08-30 10:08:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 10:08:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 10:08:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4777 transitions. [2023-08-30 10:08:01,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49979075120318056 [2023-08-30 10:08:01,480 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4777 transitions. [2023-08-30 10:08:01,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4777 transitions. [2023-08-30 10:08:01,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:01,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4777 transitions. [2023-08-30 10:08:01,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 176.92592592592592) internal successors, (4777), 27 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:01,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 354.0) internal successors, (9912), 28 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:01,494 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 354.0) internal successors, (9912), 28 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:01,495 INFO L175 Difference]: Start difference. First operand has 94 places, 142 transitions, 1159 flow. Second operand 27 states and 4777 transitions. [2023-08-30 10:08:01,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 1063 transitions, 9514 flow [2023-08-30 10:08:02,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 1063 transitions, 9401 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:02,351 INFO L231 Difference]: Finished difference. Result has 140 places, 623 transitions, 7760 flow [2023-08-30 10:08:02,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7760, PETRI_PLACES=140, PETRI_TRANSITIONS=623} [2023-08-30 10:08:02,352 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 73 predicate places. [2023-08-30 10:08:02,352 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 623 transitions, 7760 flow [2023-08-30 10:08:02,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.78571428571428) internal successors, (2167), 14 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:02,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:02,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:02,359 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 10:08:02,557 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,SelfDestructingSolverStorable38 [2023-08-30 10:08:02,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:02,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -635821128, now seen corresponding path program 1 times [2023-08-30 10:08:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706665085] [2023-08-30 10:08:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:02,614 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 10:08:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706665085] [2023-08-30 10:08:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706665085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154850635] [2023-08-30 10:08:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:02,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:02,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:02,617 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 10:08:02,621 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 10:08:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 10:08:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:02,740 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 10:08:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:08:02,767 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 10:08:02,778 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 10:08:02,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154850635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:02,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:02,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 10:08:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119100892] [2023-08-30 10:08:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 10:08:02,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2023-08-30 10:08:02,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 623 transitions, 7760 flow. Second operand has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:02,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:02,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2023-08-30 10:08:02,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:07,127 INFO L130 PetriNetUnfolder]: 15715/27153 cut-off events. [2023-08-30 10:08:07,127 INFO L131 PetriNetUnfolder]: For 177515/177515 co-relation queries the response was YES. [2023-08-30 10:08:07,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121170 conditions, 27153 events. 15715/27153 cut-off events. For 177515/177515 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 213958 event pairs, 3101 based on Foata normal form. 7909/35061 useless extension candidates. Maximal degree in co-relation 121128. Up to 20982 conditions per place. [2023-08-30 10:08:07,348 INFO L137 encePairwiseOnDemand]: 339/354 looper letters, 185 selfloop transitions, 23 changer transitions 0/213 dead transitions. [2023-08-30 10:08:07,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 213 transitions, 2727 flow [2023-08-30 10:08:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 657 transitions. [2023-08-30 10:08:07,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639830508474576 [2023-08-30 10:08:07,350 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 657 transitions. [2023-08-30 10:08:07,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 657 transitions. [2023-08-30 10:08:07,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:07,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 657 transitions. [2023-08-30 10:08:07,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:07,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:07,352 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:07,352 INFO L175 Difference]: Start difference. First operand has 140 places, 623 transitions, 7760 flow. Second operand 4 states and 657 transitions. [2023-08-30 10:08:07,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 213 transitions, 2727 flow [2023-08-30 10:08:09,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 213 transitions, 2359 flow, removed 139 selfloop flow, removed 11 redundant places. [2023-08-30 10:08:09,723 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 1801 flow [2023-08-30 10:08:09,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1801, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2023-08-30 10:08:09,723 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 59 predicate places. [2023-08-30 10:08:09,724 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 1801 flow [2023-08-30 10:08:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:09,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:09,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:09,728 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 10:08:09,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 10:08:09,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:09,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1960870729, now seen corresponding path program 1 times [2023-08-30 10:08:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:09,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408986415] [2023-08-30 10:08:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:09,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:09,980 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 10:08:09,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:09,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408986415] [2023-08-30 10:08:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408986415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588128647] [2023-08-30 10:08:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:09,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:09,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:09,982 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 10:08:09,984 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 10:08:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 10:08:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:10,103 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 10:08:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:08:10,125 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 10:08:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 10:08:10,142 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 10:08:10,153 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 10:08:10,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:10,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:10,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-30 10:08:10,185 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 10:08:10,191 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 10:08:10,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588128647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:10,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:10,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 10:08:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239673299] [2023-08-30 10:08:10,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:10,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 10:08:10,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 10:08:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:08:10,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2023-08-30 10:08:10,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 1801 flow. Second operand has 10 states, 10 states have (on average 153.1) internal successors, (1531), 10 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:10,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:10,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2023-08-30 10:08:10,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:10,628 INFO L130 PetriNetUnfolder]: 629/2151 cut-off events. [2023-08-30 10:08:10,628 INFO L131 PetriNetUnfolder]: For 10611/10640 co-relation queries the response was YES. [2023-08-30 10:08:10,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9744 conditions, 2151 events. 629/2151 cut-off events. For 10611/10640 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16598 event pairs, 121 based on Foata normal form. 1112/3256 useless extension candidates. Maximal degree in co-relation 9711. Up to 1644 conditions per place. [2023-08-30 10:08:10,638 INFO L137 encePairwiseOnDemand]: 345/354 looper letters, 128 selfloop transitions, 11 changer transitions 2/149 dead transitions. [2023-08-30 10:08:10,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 149 transitions, 1671 flow [2023-08-30 10:08:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 655 transitions. [2023-08-30 10:08:10,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625706214689266 [2023-08-30 10:08:10,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 655 transitions. [2023-08-30 10:08:10,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 655 transitions. [2023-08-30 10:08:10,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:10,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 655 transitions. [2023-08-30 10:08:10,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:10,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:10,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:10,642 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 1801 flow. Second operand 4 states and 655 transitions. [2023-08-30 10:08:10,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 149 transitions, 1671 flow [2023-08-30 10:08:10,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 149 transitions, 1521 flow, removed 33 selfloop flow, removed 9 redundant places. [2023-08-30 10:08:10,668 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1166 flow [2023-08-30 10:08:10,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1166, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-08-30 10:08:10,668 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 52 predicate places. [2023-08-30 10:08:10,668 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1166 flow [2023-08-30 10:08:10,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.1) internal successors, (1531), 10 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:10,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:10,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:10,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:10,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:10,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:10,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1147428111, now seen corresponding path program 1 times [2023-08-30 10:08:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:10,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602966578] [2023-08-30 10:08:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 10:08:10,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602966578] [2023-08-30 10:08:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602966578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943060796] [2023-08-30 10:08:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:10,975 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:10,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 10:08:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:11,096 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:11,096 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 10:08:11,112 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 10:08:11,140 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 10:08:11,175 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 10:08:11,234 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 10:08:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 10:08:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 10:08:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943060796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:11,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:11,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:08:11,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490182848] [2023-08-30 10:08:11,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:08:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:08:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=131, Unknown=2, NotChecked=0, Total=182 [2023-08-30 10:08:11,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 354 [2023-08-30 10:08:11,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1166 flow. Second operand has 14 states, 14 states have (on average 134.78571428571428) internal successors, (1887), 14 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:11,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:11,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 354 [2023-08-30 10:08:11,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:12,269 INFO L130 PetriNetUnfolder]: 642/2187 cut-off events. [2023-08-30 10:08:12,269 INFO L131 PetriNetUnfolder]: For 8166/8183 co-relation queries the response was YES. [2023-08-30 10:08:12,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 2187 events. 642/2187 cut-off events. For 8166/8183 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 16787 event pairs, 100 based on Foata normal form. 16/2202 useless extension candidates. Maximal degree in co-relation 9270. Up to 877 conditions per place. [2023-08-30 10:08:12,277 INFO L137 encePairwiseOnDemand]: 339/354 looper letters, 152 selfloop transitions, 77 changer transitions 2/239 dead transitions. [2023-08-30 10:08:12,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 239 transitions, 2265 flow [2023-08-30 10:08:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 10:08:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 10:08:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2412 transitions. [2023-08-30 10:08:12,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40079760717846463 [2023-08-30 10:08:12,280 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2412 transitions. [2023-08-30 10:08:12,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2412 transitions. [2023-08-30 10:08:12,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:12,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2412 transitions. [2023-08-30 10:08:12,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 141.88235294117646) internal successors, (2412), 17 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 354.0) internal successors, (6372), 18 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,287 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 354.0) internal successors, (6372), 18 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,287 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1166 flow. Second operand 17 states and 2412 transitions. [2023-08-30 10:08:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 239 transitions, 2265 flow [2023-08-30 10:08:12,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 239 transitions, 2234 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:12,310 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1599 flow [2023-08-30 10:08:12,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1599, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2023-08-30 10:08:12,311 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 72 predicate places. [2023-08-30 10:08:12,311 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1599 flow [2023-08-30 10:08:12,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 134.78571428571428) internal successors, (1887), 14 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:12,312 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 10:08:12,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:12,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 10:08:12,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:12,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1971824186, now seen corresponding path program 1 times [2023-08-30 10:08:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:12,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100980914] [2023-08-30 10:08:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:12,727 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 10:08:12,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100980914] [2023-08-30 10:08:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100980914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402550434] [2023-08-30 10:08:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:12,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:12,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:12,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 10:08:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:12,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:12,872 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:12,872 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 10:08:12,913 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 10:08:12,959 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 10:08:12,987 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 10:08:13,011 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 10:08:13,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:13,036 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1217 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1217) c_~p~0.base) c_~p~0.offset) 2147483650))) is different from false [2023-08-30 10:08:13,047 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1217 (Array Int Int)) (v_ArrVal_1216 Int)) (or (< (+ v_ArrVal_1216 1) |c_t_funThread1of3ForFork0_#t~post9|) (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~p~0.base (store (select |c_#memory_int| c_~p~0.base) c_~p~0.offset v_ArrVal_1216)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1217) c_~p~0.base) c_~p~0.offset))))) is different from false [2023-08-30 10:08:13,058 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1217 (Array Int Int)) (v_ArrVal_1216 Int)) (let ((.cse0 (select |c_#memory_int| c_~p~0.base))) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~p~0.base (store .cse0 c_~p~0.offset v_ArrVal_1216)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1217) c_~p~0.base) c_~p~0.offset))) (< (+ v_ArrVal_1216 1) (select .cse0 c_~p~0.offset))))) is different from false [2023-08-30 10:08:13,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:13,115 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 10:08:13,117 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 10:08:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 10:08:13,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402550434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:13,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:13,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 10:08:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574486380] [2023-08-30 10:08:13,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:13,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:08:13,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:08:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=208, Unknown=3, NotChecked=96, Total=380 [2023-08-30 10:08:13,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 354 [2023-08-30 10:08:13,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1599 flow. Second operand has 20 states, 20 states have (on average 124.55) internal successors, (2491), 20 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:13,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 354 [2023-08-30 10:08:13,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:14,001 INFO L130 PetriNetUnfolder]: 625/2247 cut-off events. [2023-08-30 10:08:14,002 INFO L131 PetriNetUnfolder]: For 11167/11200 co-relation queries the response was YES. [2023-08-30 10:08:14,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9969 conditions, 2247 events. 625/2247 cut-off events. For 11167/11200 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17628 event pairs, 128 based on Foata normal form. 45/2290 useless extension candidates. Maximal degree in co-relation 9935. Up to 813 conditions per place. [2023-08-30 10:08:14,013 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 254 selfloop transitions, 75 changer transitions 7/344 dead transitions. [2023-08-30 10:08:14,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 344 transitions, 3668 flow [2023-08-30 10:08:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 10:08:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 10:08:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2417 transitions. [2023-08-30 10:08:14,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793157564344005 [2023-08-30 10:08:14,015 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2417 transitions. [2023-08-30 10:08:14,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2417 transitions. [2023-08-30 10:08:14,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:14,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2417 transitions. [2023-08-30 10:08:14,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.27777777777777) internal successors, (2417), 18 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 354.0) internal successors, (6726), 19 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,023 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 354.0) internal successors, (6726), 19 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,023 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1599 flow. Second operand 18 states and 2417 transitions. [2023-08-30 10:08:14,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 344 transitions, 3668 flow [2023-08-30 10:08:14,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 344 transitions, 3620 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:14,060 INFO L231 Difference]: Finished difference. Result has 163 places, 199 transitions, 2306 flow [2023-08-30 10:08:14,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2306, PETRI_PLACES=163, PETRI_TRANSITIONS=199} [2023-08-30 10:08:14,061 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 96 predicate places. [2023-08-30 10:08:14,061 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 199 transitions, 2306 flow [2023-08-30 10:08:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 124.55) internal successors, (2491), 20 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:14,062 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 10:08:14,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 10:08:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:14,267 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:14,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1012977889, now seen corresponding path program 1 times [2023-08-30 10:08:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:14,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37194097] [2023-08-30 10:08:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:14,341 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 10:08:14,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:14,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37194097] [2023-08-30 10:08:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37194097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:14,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:14,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112527637] [2023-08-30 10:08:14,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:14,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 354 [2023-08-30 10:08:14,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 199 transitions, 2306 flow. Second operand has 5 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:14,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 354 [2023-08-30 10:08:14,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:14,815 INFO L130 PetriNetUnfolder]: 680/2449 cut-off events. [2023-08-30 10:08:14,816 INFO L131 PetriNetUnfolder]: For 13596/13596 co-relation queries the response was YES. [2023-08-30 10:08:14,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11380 conditions, 2449 events. 680/2449 cut-off events. For 13596/13596 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 19782 event pairs, 110 based on Foata normal form. 25/2471 useless extension candidates. Maximal degree in co-relation 11337. Up to 960 conditions per place. [2023-08-30 10:08:14,829 INFO L137 encePairwiseOnDemand]: 339/354 looper letters, 189 selfloop transitions, 89 changer transitions 0/286 dead transitions. [2023-08-30 10:08:14,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 286 transitions, 3558 flow [2023-08-30 10:08:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1207 transitions. [2023-08-30 10:08:14,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870863599677159 [2023-08-30 10:08:14,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1207 transitions. [2023-08-30 10:08:14,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1207 transitions. [2023-08-30 10:08:14,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:14,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1207 transitions. [2023-08-30 10:08:14,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 172.42857142857142) internal successors, (1207), 7 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,835 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,835 INFO L175 Difference]: Start difference. First operand has 163 places, 199 transitions, 2306 flow. Second operand 7 states and 1207 transitions. [2023-08-30 10:08:14,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 286 transitions, 3558 flow [2023-08-30 10:08:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 286 transitions, 3373 flow, removed 80 selfloop flow, removed 5 redundant places. [2023-08-30 10:08:14,887 INFO L231 Difference]: Finished difference. Result has 168 places, 214 transitions, 2680 flow [2023-08-30 10:08:14,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2680, PETRI_PLACES=168, PETRI_TRANSITIONS=214} [2023-08-30 10:08:14,887 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 101 predicate places. [2023-08-30 10:08:14,888 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 214 transitions, 2680 flow [2023-08-30 10:08:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:14,888 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 10:08:14,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-30 10:08:14,889 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:14,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1971824185, now seen corresponding path program 2 times [2023-08-30 10:08:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:14,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897844557] [2023-08-30 10:08:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:15,029 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 10:08:15,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:15,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897844557] [2023-08-30 10:08:15,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897844557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:15,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974377415] [2023-08-30 10:08:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:15,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:15,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:15,031 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 10:08:15,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:15,146 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:15,147 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 10:08:15,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:08:15,217 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 10:08:15,243 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 10:08:15,266 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 10:08:15,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:15,311 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1298 Int) (v_ArrVal_1300 (Array Int Int))) (or (< (select (select (store (store |c_#memory_int| c_~p~0.base (store (select |c_#memory_int| c_~p~0.base) c_~p~0.offset v_ArrVal_1298)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1300) c_~p~0.base) c_~p~0.offset) 2147483647) (< |c_t_funThread1of3ForFork0_#t~post9| (+ v_ArrVal_1298 1)))) is different from false [2023-08-30 10:08:15,320 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1298 Int) (v_ArrVal_1300 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~p~0.base))) (or (< (select .cse0 c_~p~0.offset) (+ v_ArrVal_1298 1)) (< (select (select (store (store |c_#memory_int| c_~p~0.base (store .cse0 c_~p~0.offset v_ArrVal_1298)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1300) c_~p~0.base) c_~p~0.offset) 2147483647)))) is different from false [2023-08-30 10:08:15,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:15,341 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 10:08:15,343 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 10:08:15,361 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 10:08:15,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974377415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:15,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:15,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-30 10:08:15,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740585519] [2023-08-30 10:08:15,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:15,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 10:08:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 10:08:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=180, Unknown=4, NotChecked=58, Total=306 [2023-08-30 10:08:15,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 354 [2023-08-30 10:08:15,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 214 transitions, 2680 flow. Second operand has 18 states, 18 states have (on average 124.83333333333333) internal successors, (2247), 18 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:15,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 354 [2023-08-30 10:08:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:16,207 INFO L130 PetriNetUnfolder]: 659/2394 cut-off events. [2023-08-30 10:08:16,207 INFO L131 PetriNetUnfolder]: For 15341/15359 co-relation queries the response was YES. [2023-08-30 10:08:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11629 conditions, 2394 events. 659/2394 cut-off events. For 15341/15359 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 19180 event pairs, 160 based on Foata normal form. 35/2427 useless extension candidates. Maximal degree in co-relation 11583. Up to 902 conditions per place. [2023-08-30 10:08:16,220 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 252 selfloop transitions, 64 changer transitions 0/324 dead transitions. [2023-08-30 10:08:16,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 324 transitions, 3986 flow [2023-08-30 10:08:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 10:08:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 10:08:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2135 transitions. [2023-08-30 10:08:16,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769420903954802 [2023-08-30 10:08:16,222 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2135 transitions. [2023-08-30 10:08:16,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2135 transitions. [2023-08-30 10:08:16,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:16,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2135 transitions. [2023-08-30 10:08:16,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 133.4375) internal successors, (2135), 16 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:16,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 354.0) internal successors, (6018), 17 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:16,227 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 354.0) internal successors, (6018), 17 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:16,227 INFO L175 Difference]: Start difference. First operand has 168 places, 214 transitions, 2680 flow. Second operand 16 states and 2135 transitions. [2023-08-30 10:08:16,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 324 transitions, 3986 flow [2023-08-30 10:08:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 324 transitions, 3912 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:16,269 INFO L231 Difference]: Finished difference. Result has 182 places, 210 transitions, 2713 flow [2023-08-30 10:08:16,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2713, PETRI_PLACES=182, PETRI_TRANSITIONS=210} [2023-08-30 10:08:16,269 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 115 predicate places. [2023-08-30 10:08:16,269 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 210 transitions, 2713 flow [2023-08-30 10:08:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.83333333333333) internal successors, (2247), 18 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:16,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:16,270 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 10:08:16,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:16,471 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:16,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1087533571, now seen corresponding path program 1 times [2023-08-30 10:08:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:16,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508475796] [2023-08-30 10:08:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:16,547 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 10:08:16,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508475796] [2023-08-30 10:08:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508475796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:16,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:16,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139475672] [2023-08-30 10:08:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:16,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:16,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 354 [2023-08-30 10:08:16,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 210 transitions, 2713 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:16,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:16,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 354 [2023-08-30 10:08:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:17,050 INFO L130 PetriNetUnfolder]: 704/2574 cut-off events. [2023-08-30 10:08:17,050 INFO L131 PetriNetUnfolder]: For 17078/17078 co-relation queries the response was YES. [2023-08-30 10:08:17,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12588 conditions, 2574 events. 704/2574 cut-off events. For 17078/17078 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21101 event pairs, 112 based on Foata normal form. 21/2592 useless extension candidates. Maximal degree in co-relation 12542. Up to 1092 conditions per place. [2023-08-30 10:08:17,064 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 181 selfloop transitions, 98 changer transitions 0/287 dead transitions. [2023-08-30 10:08:17,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 287 transitions, 3916 flow [2023-08-30 10:08:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1202 transitions. [2023-08-30 10:08:17,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850686037126715 [2023-08-30 10:08:17,066 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1202 transitions. [2023-08-30 10:08:17,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1202 transitions. [2023-08-30 10:08:17,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:17,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1202 transitions. [2023-08-30 10:08:17,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.71428571428572) internal successors, (1202), 7 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:17,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:17,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:17,070 INFO L175 Difference]: Start difference. First operand has 182 places, 210 transitions, 2713 flow. Second operand 7 states and 1202 transitions. [2023-08-30 10:08:17,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 287 transitions, 3916 flow [2023-08-30 10:08:17,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 287 transitions, 3722 flow, removed 30 selfloop flow, removed 14 redundant places. [2023-08-30 10:08:17,133 INFO L231 Difference]: Finished difference. Result has 178 places, 230 transitions, 3142 flow [2023-08-30 10:08:17,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3142, PETRI_PLACES=178, PETRI_TRANSITIONS=230} [2023-08-30 10:08:17,134 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 111 predicate places. [2023-08-30 10:08:17,134 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 230 transitions, 3142 flow [2023-08-30 10:08:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:17,135 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 10:08:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-30 10:08:17,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:17,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1383409925, now seen corresponding path program 2 times [2023-08-30 10:08:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90319706] [2023-08-30 10:08:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:17,304 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 10:08:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90319706] [2023-08-30 10:08:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90319706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558907682] [2023-08-30 10:08:17,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:17,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:17,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 10:08:17,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:17,447 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:17,448 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 10:08:17,493 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 10:08:17,535 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 10:08:17,561 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 10:08:17,580 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 10:08:17,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558907682] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 10:08:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040968323] [2023-08-30 10:08:17,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:17,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:08:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:08:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:08:17,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 354 [2023-08-30 10:08:17,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 230 transitions, 3142 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:17,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:17,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 354 [2023-08-30 10:08:17,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:18,179 INFO L130 PetriNetUnfolder]: 690/2561 cut-off events. [2023-08-30 10:08:18,179 INFO L131 PetriNetUnfolder]: For 19591/19642 co-relation queries the response was YES. [2023-08-30 10:08:18,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12929 conditions, 2561 events. 690/2561 cut-off events. For 19591/19642 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 21075 event pairs, 246 based on Foata normal form. 33/2589 useless extension candidates. Maximal degree in co-relation 12881. Up to 1192 conditions per place. [2023-08-30 10:08:18,193 INFO L137 encePairwiseOnDemand]: 342/354 looper letters, 219 selfloop transitions, 49 changer transitions 1/277 dead transitions. [2023-08-30 10:08:18,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 277 transitions, 3898 flow [2023-08-30 10:08:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1187 transitions. [2023-08-30 10:08:18,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47901533494753834 [2023-08-30 10:08:18,194 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1187 transitions. [2023-08-30 10:08:18,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1187 transitions. [2023-08-30 10:08:18,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:18,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1187 transitions. [2023-08-30 10:08:18,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.57142857142858) internal successors, (1187), 7 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:18,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:18,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:18,197 INFO L175 Difference]: Start difference. First operand has 178 places, 230 transitions, 3142 flow. Second operand 7 states and 1187 transitions. [2023-08-30 10:08:18,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 277 transitions, 3898 flow [2023-08-30 10:08:18,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 277 transitions, 3805 flow, removed 40 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:18,249 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 3160 flow [2023-08-30 10:08:18,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3160, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2023-08-30 10:08:18,250 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 117 predicate places. [2023-08-30 10:08:18,250 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 3160 flow [2023-08-30 10:08:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:18,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:18,250 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] [2023-08-30 10:08:18,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:18,451 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:18,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash -732297664, now seen corresponding path program 1 times [2023-08-30 10:08:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981267504] [2023-08-30 10:08:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 10:08:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981267504] [2023-08-30 10:08:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981267504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:18,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468116602] [2023-08-30 10:08:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:18,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 354 [2023-08-30 10:08:18,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 3160 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:18,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:18,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 354 [2023-08-30 10:08:18,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:19,120 INFO L130 PetriNetUnfolder]: 682/2546 cut-off events. [2023-08-30 10:08:19,120 INFO L131 PetriNetUnfolder]: For 20683/20683 co-relation queries the response was YES. [2023-08-30 10:08:19,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 2546 events. 682/2546 cut-off events. For 20683/20683 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20995 event pairs, 113 based on Foata normal form. 17/2561 useless extension candidates. Maximal degree in co-relation 13011. Up to 1145 conditions per place. [2023-08-30 10:08:19,134 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 171 selfloop transitions, 102 changer transitions 2/283 dead transitions. [2023-08-30 10:08:19,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 283 transitions, 4163 flow [2023-08-30 10:08:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1195 transitions. [2023-08-30 10:08:19,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48224374495560934 [2023-08-30 10:08:19,135 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1195 transitions. [2023-08-30 10:08:19,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1195 transitions. [2023-08-30 10:08:19,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:19,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1195 transitions. [2023-08-30 10:08:19,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.71428571428572) internal successors, (1195), 7 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,138 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,138 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 3160 flow. Second operand 7 states and 1195 transitions. [2023-08-30 10:08:19,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 283 transitions, 4163 flow [2023-08-30 10:08:19,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 283 transitions, 4085 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 10:08:19,192 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 3547 flow [2023-08-30 10:08:19,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2023-08-30 10:08:19,192 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 119 predicate places. [2023-08-30 10:08:19,192 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 3547 flow [2023-08-30 10:08:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:19,193 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 10:08:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-30 10:08:19,193 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:19,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1004226159, now seen corresponding path program 1 times [2023-08-30 10:08:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095903003] [2023-08-30 10:08:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:19,283 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 10:08:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095903003] [2023-08-30 10:08:19,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095903003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:19,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:19,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:08:19,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404556759] [2023-08-30 10:08:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:19,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 354 [2023-08-30 10:08:19,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 3547 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:19,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 354 [2023-08-30 10:08:19,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:19,966 INFO L130 PetriNetUnfolder]: 704/2602 cut-off events. [2023-08-30 10:08:19,966 INFO L131 PetriNetUnfolder]: For 26157/26157 co-relation queries the response was YES. [2023-08-30 10:08:19,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13948 conditions, 2602 events. 704/2602 cut-off events. For 26157/26157 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 21530 event pairs, 134 based on Foata normal form. 22/2622 useless extension candidates. Maximal degree in co-relation 13895. Up to 1008 conditions per place. [2023-08-30 10:08:19,981 INFO L137 encePairwiseOnDemand]: 337/354 looper letters, 157 selfloop transitions, 132 changer transitions 6/303 dead transitions. [2023-08-30 10:08:19,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 303 transitions, 4772 flow [2023-08-30 10:08:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:08:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:08:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1614 transitions. [2023-08-30 10:08:19,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559322033898305 [2023-08-30 10:08:19,983 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1614 transitions. [2023-08-30 10:08:19,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1614 transitions. [2023-08-30 10:08:19,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:19,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1614 transitions. [2023-08-30 10:08:19,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.4) internal successors, (1614), 10 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 354.0) internal successors, (3894), 11 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,986 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 354.0) internal successors, (3894), 11 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:19,986 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 3547 flow. Second operand 10 states and 1614 transitions. [2023-08-30 10:08:19,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 303 transitions, 4772 flow [2023-08-30 10:08:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 303 transitions, 4561 flow, removed 69 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:20,055 INFO L231 Difference]: Finished difference. Result has 196 places, 246 transitions, 3938 flow [2023-08-30 10:08:20,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3938, PETRI_PLACES=196, PETRI_TRANSITIONS=246} [2023-08-30 10:08:20,055 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2023-08-30 10:08:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 246 transitions, 3938 flow [2023-08-30 10:08:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:20,055 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 10:08:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-30 10:08:20,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:20,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2102312697, now seen corresponding path program 2 times [2023-08-30 10:08:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478578466] [2023-08-30 10:08:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:20,256 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 10:08:20,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478578466] [2023-08-30 10:08:20,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478578466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62763766] [2023-08-30 10:08:20,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:20,259 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:20,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 10:08:20,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:20,388 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:20,389 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 10:08:20,445 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 10:08:20,473 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 10:08:20,517 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 10:08:20,535 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 10:08:20,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:20,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:20,606 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 10:08:20,608 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 10:08:20,647 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 10:08:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62763766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:20,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-30 10:08:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995742098] [2023-08-30 10:08:20,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 10:08:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 10:08:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=374, Unknown=1, NotChecked=0, Total=462 [2023-08-30 10:08:20,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 354 [2023-08-30 10:08:20,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 246 transitions, 3938 flow. Second operand has 22 states, 22 states have (on average 118.86363636363636) internal successors, (2615), 22 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:20,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 354 [2023-08-30 10:08:20,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:21,857 INFO L130 PetriNetUnfolder]: 693/2547 cut-off events. [2023-08-30 10:08:21,857 INFO L131 PetriNetUnfolder]: For 25330/25342 co-relation queries the response was YES. [2023-08-30 10:08:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14058 conditions, 2547 events. 693/2547 cut-off events. For 25330/25342 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 20927 event pairs, 125 based on Foata normal form. 17/2557 useless extension candidates. Maximal degree in co-relation 14001. Up to 850 conditions per place. [2023-08-30 10:08:21,875 INFO L137 encePairwiseOnDemand]: 338/354 looper letters, 231 selfloop transitions, 114 changer transitions 36/389 dead transitions. [2023-08-30 10:08:21,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 389 transitions, 5783 flow [2023-08-30 10:08:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 10:08:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 10:08:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3910 transitions. [2023-08-30 10:08:21,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3451624293785311 [2023-08-30 10:08:21,880 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3910 transitions. [2023-08-30 10:08:21,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3910 transitions. [2023-08-30 10:08:21,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:21,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3910 transitions. [2023-08-30 10:08:21,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 122.1875) internal successors, (3910), 32 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 354.0) internal successors, (11682), 33 states have internal predecessors, (11682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,894 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 354.0) internal successors, (11682), 33 states have internal predecessors, (11682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,894 INFO L175 Difference]: Start difference. First operand has 196 places, 246 transitions, 3938 flow. Second operand 32 states and 3910 transitions. [2023-08-30 10:08:21,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 389 transitions, 5783 flow [2023-08-30 10:08:21,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 389 transitions, 5729 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:21,994 INFO L231 Difference]: Finished difference. Result has 224 places, 241 transitions, 3974 flow [2023-08-30 10:08:21,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3974, PETRI_PLACES=224, PETRI_TRANSITIONS=241} [2023-08-30 10:08:21,995 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 157 predicate places. [2023-08-30 10:08:21,995 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 241 transitions, 3974 flow [2023-08-30 10:08:21,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 118.86363636363636) internal successors, (2615), 22 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:21,996 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 10:08:22,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 10:08:22,197 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:22,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash 827680069, now seen corresponding path program 1 times [2023-08-30 10:08:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593890349] [2023-08-30 10:08:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:22,296 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 10:08:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593890349] [2023-08-30 10:08:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593890349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:22,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070409436] [2023-08-30 10:08:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:22,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 354 [2023-08-30 10:08:22,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 241 transitions, 3974 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:22,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 354 [2023-08-30 10:08:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:22,798 INFO L130 PetriNetUnfolder]: 671/2443 cut-off events. [2023-08-30 10:08:22,798 INFO L131 PetriNetUnfolder]: For 26233/26233 co-relation queries the response was YES. [2023-08-30 10:08:22,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13750 conditions, 2443 events. 671/2443 cut-off events. For 26233/26233 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 19950 event pairs, 216 based on Foata normal form. 16/2456 useless extension candidates. Maximal degree in co-relation 13693. Up to 1102 conditions per place. [2023-08-30 10:08:22,813 INFO L137 encePairwiseOnDemand]: 340/354 looper letters, 144 selfloop transitions, 92 changer transitions 45/289 dead transitions. [2023-08-30 10:08:22,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 289 transitions, 5059 flow [2023-08-30 10:08:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-08-30 10:08:22,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47578692493946734 [2023-08-30 10:08:22,815 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-08-30 10:08:22,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-08-30 10:08:22,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:22,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-08-30 10:08:22,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.42857142857142) internal successors, (1179), 7 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,818 INFO L175 Difference]: Start difference. First operand has 224 places, 241 transitions, 3974 flow. Second operand 7 states and 1179 transitions. [2023-08-30 10:08:22,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 289 transitions, 5059 flow [2023-08-30 10:08:22,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 289 transitions, 4865 flow, removed 11 selfloop flow, removed 21 redundant places. [2023-08-30 10:08:22,884 INFO L231 Difference]: Finished difference. Result has 211 places, 215 transitions, 3671 flow [2023-08-30 10:08:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3671, PETRI_PLACES=211, PETRI_TRANSITIONS=215} [2023-08-30 10:08:22,885 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 144 predicate places. [2023-08-30 10:08:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 215 transitions, 3671 flow [2023-08-30 10:08:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:22,886 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 10:08:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-30 10:08:22,886 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:22,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash -755543775, now seen corresponding path program 2 times [2023-08-30 10:08:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:22,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842147294] [2023-08-30 10:08:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:23,097 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 10:08:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842147294] [2023-08-30 10:08:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842147294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921676229] [2023-08-30 10:08:23,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:23,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:23,099 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:23,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 10:08:23,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:23,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:23,256 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:23,256 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 10:08:23,323 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 10:08:23,383 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 10:08:23,409 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 10:08:23,422 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 10:08:23,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:23,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921676229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:23,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:23,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 10:08:23,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025947930] [2023-08-30 10:08:23,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:23,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:08:23,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:23,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:08:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:08:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 354 [2023-08-30 10:08:23,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 215 transitions, 3671 flow. Second operand has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:23,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 354 [2023-08-30 10:08:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:24,043 INFO L130 PetriNetUnfolder]: 628/2297 cut-off events. [2023-08-30 10:08:24,043 INFO L131 PetriNetUnfolder]: For 27780/27802 co-relation queries the response was YES. [2023-08-30 10:08:24,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13097 conditions, 2297 events. 628/2297 cut-off events. For 27780/27802 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18492 event pairs, 193 based on Foata normal form. 14/2310 useless extension candidates. Maximal degree in co-relation 13038. Up to 842 conditions per place. [2023-08-30 10:08:24,059 INFO L137 encePairwiseOnDemand]: 344/354 looper letters, 190 selfloop transitions, 44 changer transitions 22/264 dead transitions. [2023-08-30 10:08:24,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 264 transitions, 4384 flow [2023-08-30 10:08:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 10:08:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 10:08:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1342 transitions. [2023-08-30 10:08:24,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738700564971751 [2023-08-30 10:08:24,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1342 transitions. [2023-08-30 10:08:24,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1342 transitions. [2023-08-30 10:08:24,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:24,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1342 transitions. [2023-08-30 10:08:24,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.75) internal successors, (1342), 8 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,063 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 354.0) internal successors, (3186), 9 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,063 INFO L175 Difference]: Start difference. First operand has 211 places, 215 transitions, 3671 flow. Second operand 8 states and 1342 transitions. [2023-08-30 10:08:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 264 transitions, 4384 flow [2023-08-30 10:08:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 264 transitions, 4341 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-30 10:08:24,134 INFO L231 Difference]: Finished difference. Result has 208 places, 198 transitions, 3414 flow [2023-08-30 10:08:24,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=3559, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3414, PETRI_PLACES=208, PETRI_TRANSITIONS=198} [2023-08-30 10:08:24,135 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 141 predicate places. [2023-08-30 10:08:24,135 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 198 transitions, 3414 flow [2023-08-30 10:08:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:24,135 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:24,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:24,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-30 10:08:24,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:24,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash 172508194, now seen corresponding path program 2 times [2023-08-30 10:08:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:24,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404475247] [2023-08-30 10:08:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 10:08:24,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:24,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404475247] [2023-08-30 10:08:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404475247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:24,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972725249] [2023-08-30 10:08:24,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:24,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:24,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:24,496 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:24,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 10:08:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 10:08:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:24,639 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:24,640 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 10:08:24,692 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 10:08:24,716 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 10:08:24,757 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 10:08:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 10:08:24,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:24,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972725249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 10:08:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774829127] [2023-08-30 10:08:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:08:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:08:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:08:24,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 354 [2023-08-30 10:08:24,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 198 transitions, 3414 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:24,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 354 [2023-08-30 10:08:24,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:25,358 INFO L130 PetriNetUnfolder]: 584/2067 cut-off events. [2023-08-30 10:08:25,358 INFO L131 PetriNetUnfolder]: For 25510/25530 co-relation queries the response was YES. [2023-08-30 10:08:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11714 conditions, 2067 events. 584/2067 cut-off events. For 25510/25530 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 16087 event pairs, 214 based on Foata normal form. 10/2076 useless extension candidates. Maximal degree in co-relation 11656. Up to 1216 conditions per place. [2023-08-30 10:08:25,376 INFO L137 encePairwiseOnDemand]: 343/354 looper letters, 175 selfloop transitions, 14 changer transitions 31/228 dead transitions. [2023-08-30 10:08:25,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 228 transitions, 3863 flow [2023-08-30 10:08:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:08:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:08:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1628 transitions. [2023-08-30 10:08:25,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598870056497175 [2023-08-30 10:08:25,383 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1628 transitions. [2023-08-30 10:08:25,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1628 transitions. [2023-08-30 10:08:25,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:25,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1628 transitions. [2023-08-30 10:08:25,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 354.0) internal successors, (3894), 11 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,387 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 354.0) internal successors, (3894), 11 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,388 INFO L175 Difference]: Start difference. First operand has 208 places, 198 transitions, 3414 flow. Second operand 10 states and 1628 transitions. [2023-08-30 10:08:25,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 228 transitions, 3863 flow [2023-08-30 10:08:25,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 228 transitions, 3696 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-30 10:08:25,450 INFO L231 Difference]: Finished difference. Result has 196 places, 172 transitions, 2804 flow [2023-08-30 10:08:25,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2804, PETRI_PLACES=196, PETRI_TRANSITIONS=172} [2023-08-30 10:08:25,450 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2023-08-30 10:08:25,450 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 172 transitions, 2804 flow [2023-08-30 10:08:25,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:25,451 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, 1] [2023-08-30 10:08:25,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:25,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-30 10:08:25,651 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:25,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1594992125, now seen corresponding path program 1 times [2023-08-30 10:08:25,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854607191] [2023-08-30 10:08:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 10:08:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854607191] [2023-08-30 10:08:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854607191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:25,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:25,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:08:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457526979] [2023-08-30 10:08:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:25,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:25,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2023-08-30 10:08:25,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 172 transitions, 2804 flow. Second operand has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:25,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2023-08-30 10:08:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:26,298 INFO L130 PetriNetUnfolder]: 535/1823 cut-off events. [2023-08-30 10:08:26,299 INFO L131 PetriNetUnfolder]: For 20892/20892 co-relation queries the response was YES. [2023-08-30 10:08:26,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10216 conditions, 1823 events. 535/1823 cut-off events. For 20892/20892 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13616 event pairs, 121 based on Foata normal form. 10/1831 useless extension candidates. Maximal degree in co-relation 10160. Up to 626 conditions per place. [2023-08-30 10:08:26,312 INFO L137 encePairwiseOnDemand]: 343/354 looper letters, 95 selfloop transitions, 75 changer transitions 39/217 dead transitions. [2023-08-30 10:08:26,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 217 transitions, 3620 flow [2023-08-30 10:08:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:08:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:08:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1455 transitions. [2023-08-30 10:08:26,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566854990583804 [2023-08-30 10:08:26,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1455 transitions. [2023-08-30 10:08:26,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1455 transitions. [2023-08-30 10:08:26,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:26,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1455 transitions. [2023-08-30 10:08:26,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.66666666666666) internal successors, (1455), 9 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:26,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 354.0) internal successors, (3540), 10 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:26,334 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 354.0) internal successors, (3540), 10 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:26,335 INFO L175 Difference]: Start difference. First operand has 196 places, 172 transitions, 2804 flow. Second operand 9 states and 1455 transitions. [2023-08-30 10:08:26,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 217 transitions, 3620 flow [2023-08-30 10:08:26,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 217 transitions, 3403 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-30 10:08:26,413 INFO L231 Difference]: Finished difference. Result has 187 places, 147 transitions, 2442 flow [2023-08-30 10:08:26,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2442, PETRI_PLACES=187, PETRI_TRANSITIONS=147} [2023-08-30 10:08:26,414 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 120 predicate places. [2023-08-30 10:08:26,414 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 147 transitions, 2442 flow [2023-08-30 10:08:26,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:26,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:26,414 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, 1] [2023-08-30 10:08:26,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-30 10:08:26,415 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:26,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1396158377, now seen corresponding path program 2 times [2023-08-30 10:08:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995577752] [2023-08-30 10:08:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:08:26,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:26,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995577752] [2023-08-30 10:08:26,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995577752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:26,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890594972] [2023-08-30 10:08:26,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:26,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:26,658 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:26,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 10:08:26,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:26,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:26,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 10:08:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:26,829 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:26,829 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 10:08:26,896 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 10:08:26,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 10:08:26,979 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 10:08:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:08:26,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:27,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:27,078 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 10:08:27,080 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 10:08:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 10:08:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890594972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:27,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:27,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-30 10:08:27,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151541524] [2023-08-30 10:08:27,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:27,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 10:08:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 10:08:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=371, Unknown=3, NotChecked=0, Total=462 [2023-08-30 10:08:27,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 354 [2023-08-30 10:08:27,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 147 transitions, 2442 flow. Second operand has 22 states, 22 states have (on average 147.95454545454547) internal successors, (3255), 22 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:27,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:27,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 354 [2023-08-30 10:08:27,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:28,452 INFO L130 PetriNetUnfolder]: 518/1656 cut-off events. [2023-08-30 10:08:28,452 INFO L131 PetriNetUnfolder]: For 17832/17842 co-relation queries the response was YES. [2023-08-30 10:08:28,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 1656 events. 518/1656 cut-off events. For 17832/17842 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11813 event pairs, 121 based on Foata normal form. 16/1671 useless extension candidates. Maximal degree in co-relation 9278. Up to 557 conditions per place. [2023-08-30 10:08:28,459 INFO L137 encePairwiseOnDemand]: 342/354 looper letters, 28 selfloop transitions, 4 changer transitions 193/230 dead transitions. [2023-08-30 10:08:28,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 230 transitions, 3479 flow [2023-08-30 10:08:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 10:08:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 10:08:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3314 transitions. [2023-08-30 10:08:28,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552645095017977 [2023-08-30 10:08:28,463 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3314 transitions. [2023-08-30 10:08:28,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3314 transitions. [2023-08-30 10:08:28,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:28,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3314 transitions. [2023-08-30 10:08:28,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 150.63636363636363) internal successors, (3314), 22 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 354.0) internal successors, (8142), 23 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,472 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 354.0) internal successors, (8142), 23 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,473 INFO L175 Difference]: Start difference. First operand has 187 places, 147 transitions, 2442 flow. Second operand 22 states and 3314 transitions. [2023-08-30 10:08:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 230 transitions, 3479 flow [2023-08-30 10:08:28,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 230 transitions, 3140 flow, removed 30 selfloop flow, removed 20 redundant places. [2023-08-30 10:08:28,525 INFO L231 Difference]: Finished difference. Result has 174 places, 36 transitions, 315 flow [2023-08-30 10:08:28,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=315, PETRI_PLACES=174, PETRI_TRANSITIONS=36} [2023-08-30 10:08:28,526 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 107 predicate places. [2023-08-30 10:08:28,526 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 36 transitions, 315 flow [2023-08-30 10:08:28,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 147.95454545454547) internal successors, (3255), 22 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:28,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2023-08-30 10:08:28,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:28,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:28,737 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 10:08:28,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 514275343, now seen corresponding path program 1 times [2023-08-30 10:08:28,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563532019] [2023-08-30 10:08:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:08:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563532019] [2023-08-30 10:08:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563532019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:28,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692314677] [2023-08-30 10:08:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:28,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:28,798 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 10:08:28,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 10:08:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 10:08:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:08:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 10:08:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692314677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:29,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 10:08:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626079071] [2023-08-30 10:08:29,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 10:08:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 10:08:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-08-30 10:08:29,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 354 [2023-08-30 10:08:29,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 36 transitions, 315 flow. Second operand has 11 states, 11 states have (on average 167.0) internal successors, (1837), 11 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:29,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 354 [2023-08-30 10:08:29,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:29,129 INFO L130 PetriNetUnfolder]: 63/188 cut-off events. [2023-08-30 10:08:29,129 INFO L131 PetriNetUnfolder]: For 1168/1168 co-relation queries the response was YES. [2023-08-30 10:08:29,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 188 events. 63/188 cut-off events. For 1168/1168 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 625 event pairs, 8 based on Foata normal form. 6/194 useless extension candidates. Maximal degree in co-relation 868. Up to 81 conditions per place. [2023-08-30 10:08:29,130 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-30 10:08:29,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 55 transitions, 565 flow [2023-08-30 10:08:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:08:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:08:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1020 transitions. [2023-08-30 10:08:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480225988700565 [2023-08-30 10:08:29,131 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1020 transitions. [2023-08-30 10:08:29,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1020 transitions. [2023-08-30 10:08:29,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:29,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1020 transitions. [2023-08-30 10:08:29,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 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 10:08:29,133 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 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 10:08:29,133 INFO L175 Difference]: Start difference. First operand has 174 places, 36 transitions, 315 flow. Second operand 6 states and 1020 transitions. [2023-08-30 10:08:29,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 55 transitions, 565 flow [2023-08-30 10:08:29,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 315 flow, removed 11 selfloop flow, removed 44 redundant places. [2023-08-30 10:08:29,135 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-30 10:08:29,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-30 10:08:29,135 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-30 10:08:29,136 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-30 10:08:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 167.0) internal successors, (1837), 11 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 18 remaining) [2023-08-30 10:08:29,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2023-08-30 10:08:29,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-08-30 10:08:29,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-08-30 10:08:29,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-08-30 10:08:29,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-08-30 10:08:29,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-08-30 10:08:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:29,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:29,341 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:29,341 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,SAFE,SAFE (1/2) [2023-08-30 10:08:29,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,361 INFO L130 PetriNetUnfolder]: 34/301 cut-off events. [2023-08-30 10:08:29,361 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:08:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 301 events. 34/301 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 954 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-30 10:08:29,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:29,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 193 transitions, 407 flow [2023-08-30 10:08:29,387 INFO L130 PetriNetUnfolder]: 34/301 cut-off events. [2023-08-30 10:08:29,387 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:08:29,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 301 events. 34/301 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 954 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-30 10:08:29,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-30 10:08:32,229 INFO L134 LiptonReduction]: Checked pairs total: 45722 [2023-08-30 10:08:32,230 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 10:08:32,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:08:32,231 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:32,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:08:32,237 INFO L130 PetriNetUnfolder]: 18/91 cut-off events. [2023-08-30 10:08:32,237 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 10:08:32,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:32,237 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 10:08:32,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:08:32,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1916455213, now seen corresponding path program 1 times [2023-08-30 10:08:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347352338] [2023-08-30 10:08:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:32,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:08:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:32,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:08:32,259 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:08:32,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:08:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-30 10:08:32,259 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:08:32,260 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:08:32,260 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:08:32,260 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 10:08:32,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 10:08:32,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,307 INFO L130 PetriNetUnfolder]: 44/381 cut-off events. [2023-08-30 10:08:32,308 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 10:08:32,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 381 events. 44/381 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1267 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 309. Up to 10 conditions per place. [2023-08-30 10:08:32,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:32,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,313 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 234 transitions, 500 flow [2023-08-30 10:08:32,348 INFO L130 PetriNetUnfolder]: 44/381 cut-off events. [2023-08-30 10:08:32,348 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 10:08:32,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 381 events. 44/381 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1267 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 309. Up to 10 conditions per place. [2023-08-30 10:08:32,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 32480 [2023-08-30 10:08:35,351 INFO L134 LiptonReduction]: Checked pairs total: 75650 [2023-08-30 10:08:35,351 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-08-30 10:08:35,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:08:35,352 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;@7edf497e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:35,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 10:08:35,354 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 10:08:35,354 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:35,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:35,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:08:35,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-30 10:08:35,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1930181473, now seen corresponding path program 1 times [2023-08-30 10:08:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:35,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331070778] [2023-08-30 10:08:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:35,367 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 10:08:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331070778] [2023-08-30 10:08:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331070778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:35,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:08:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213380264] [2023-08-30 10:08:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:35,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 427 [2023-08-30 10:08:35,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 102 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:35,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:35,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 427 [2023-08-30 10:08:35,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand