./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_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_36-indirect_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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --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 10:08:07,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 10:08:07,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 10:08:07,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 10:08:07,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 10:08:07,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 10:08:07,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 10:08:07,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 10:08:07,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 10:08:07,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 10:08:07,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 10:08:07,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 10:08:07,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 10:08:07,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 10:08:07,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 10:08:07,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 10:08:07,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 10:08:07,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 10:08:07,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 10:08:07,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 10:08:07,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 10:08:07,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 10:08:07,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 10:08:07,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 10:08:07,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 10:08:07,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 10:08:07,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 10:08:07,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 10:08:07,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 10:08:07,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 10:08:07,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 10:08:07,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 10:08:07,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 10:08:07,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 10:08:07,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 10:08:07,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 10:08:07,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 10:08:07,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 10:08:07,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 10:08:07,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 10:08:07,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 10:08:07,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 10:08:07,222 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 10:08:07,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 10:08:07,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 10:08:07,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 10:08:07,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 10:08:07,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 10:08:07,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 10:08:07,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 10:08:07,226 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 10:08:07,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 10:08:07,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 10:08:07,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 10:08:07,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 10:08:07,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 10:08:07,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 10:08:07,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:08:07,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 10:08:07,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 10:08:07,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 10:08:07,231 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 10:08:07,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 10:08:07,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 10:08:07,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 10:08:07,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 10:08:07,475 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 10:08:07,475 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 10:08:07,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-30 10:08:08,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 10:08:08,653 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 10:08:08,653 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-30 10:08:08,671 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc46dc58e/1f5412ab40ab4c56bce96d419def425c/FLAGb4a301f06 [2023-08-30 10:08:08,680 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc46dc58e/1f5412ab40ab4c56bce96d419def425c [2023-08-30 10:08:08,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 10:08:08,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 10:08:08,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 10:08:08,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 10:08:08,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 10:08:08,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:08:08" (1/1) ... [2023-08-30 10:08:08,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e5ab83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:08, skipping insertion in model container [2023-08-30 10:08:08,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:08:08" (1/1) ... [2023-08-30 10:08:08,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 10:08:08,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 10:08:08,923 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_36-indirect_racefree.i[30176,30189] [2023-08-30 10:08:08,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:08:08,949 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 10:08:08,982 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_36-indirect_racefree.i[30176,30189] [2023-08-30 10:08:08,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 10:08:09,032 INFO L208 MainTranslator]: Completed translation [2023-08-30 10:08:09,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09 WrapperNode [2023-08-30 10:08:09,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 10:08:09,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 10:08:09,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 10:08:09,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 10:08:09,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,083 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-08-30 10:08:09,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 10:08:09,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 10:08:09,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 10:08:09,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 10:08:09,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,119 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 10:08:09,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 10:08:09,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 10:08:09,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 10:08:09,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (1/1) ... [2023-08-30 10:08:09,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 10:08:09,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:09,154 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 10:08:09,160 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 10:08:09,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 10:08:09,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 10:08:09,179 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 10:08:09,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 10:08:09,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 10:08:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 10:08:09,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 10:08:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 10:08:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 10:08:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 10:08:09,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 10:08:09,181 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 10:08:09,297 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 10:08:09,299 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 10:08:09,435 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 10:08:09,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 10:08:09,442 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 10:08:09,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:08:09 BoogieIcfgContainer [2023-08-30 10:08:09,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 10:08:09,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 10:08:09,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 10:08:09,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 10:08:09,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:08:08" (1/3) ... [2023-08-30 10:08:09,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10067923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:08:09, skipping insertion in model container [2023-08-30 10:08:09,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:08:09" (2/3) ... [2023-08-30 10:08:09,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10067923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:08:09, skipping insertion in model container [2023-08-30 10:08:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:08:09" (3/3) ... [2023-08-30 10:08:09,450 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-08-30 10:08:09,455 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 10:08:09,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 10:08:09,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 10:08:09,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 10:08:09,512 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 10:08:09,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 10:08:09,570 INFO L130 PetriNetUnfolder]: 17/160 cut-off events. [2023-08-30 10:08:09,570 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:08:09,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 160 events. 17/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 379 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 10:08:09,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 10:08:09,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 254 flow [2023-08-30 10:08:09,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:09,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 123 transitions, 254 flow [2023-08-30 10:08:09,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 123 transitions, 254 flow [2023-08-30 10:08:09,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 123 transitions, 254 flow [2023-08-30 10:08:09,616 INFO L130 PetriNetUnfolder]: 16/157 cut-off events. [2023-08-30 10:08:09,616 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:08:09,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 157 events. 16/157 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 10:08:09,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-30 10:08:12,207 INFO L134 LiptonReduction]: Checked pairs total: 6399 [2023-08-30 10:08:12,208 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-30 10:08:12,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:08:12,221 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:12,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 10:08:12,223 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-08-30 10:08:12,224 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:12,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:12,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 10:08:12,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:12,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 14872980, now seen corresponding path program 1 times [2023-08-30 10:08:12,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944498152] [2023-08-30 10:08:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:12,399 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 10:08:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:12,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944498152] [2023-08-30 10:08:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944498152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:12,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:12,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:08:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106175120] [2023-08-30 10:08:12,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:12,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 234 [2023-08-30 10:08:12,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:12,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 234 [2023-08-30 10:08:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:12,528 INFO L130 PetriNetUnfolder]: 98/232 cut-off events. [2023-08-30 10:08:12,528 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:08:12,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 232 events. 98/232 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 854 event pairs, 78 based on Foata normal form. 8/191 useless extension candidates. Maximal degree in co-relation 441. Up to 207 conditions per place. [2023-08-30 10:08:12,535 INFO L137 encePairwiseOnDemand]: 220/234 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 10:08:12,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 178 flow [2023-08-30 10:08:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-30 10:08:12,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5455840455840456 [2023-08-30 10:08:12,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-30 10:08:12,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-30 10:08:12,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:12,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-30 10:08:12,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 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 10:08:12,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 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 10:08:12,573 INFO L175 Difference]: Start difference. First operand has 35 places, 40 transitions, 88 flow. Second operand 3 states and 383 transitions. [2023-08-30 10:08:12,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 178 flow [2023-08-30 10:08:12,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:12,577 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 74 flow [2023-08-30 10:08:12,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-30 10:08:12,581 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-30 10:08:12,581 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 74 flow [2023-08-30 10:08:12,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:12,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 10:08:12,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:12,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash 699981627, now seen corresponding path program 1 times [2023-08-30 10:08:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:12,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147192568] [2023-08-30 10:08:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:12,767 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 10:08:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147192568] [2023-08-30 10:08:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147192568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:12,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:08:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039373677] [2023-08-30 10:08:12,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:12,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-30 10:08:12,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:12,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-30 10:08:12,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:12,882 INFO L130 PetriNetUnfolder]: 84/201 cut-off events. [2023-08-30 10:08:12,883 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 10:08:12,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 201 events. 84/201 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 702 event pairs, 21 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 418. Up to 139 conditions per place. [2023-08-30 10:08:12,885 INFO L137 encePairwiseOnDemand]: 230/234 looper letters, 29 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 10:08:12,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 151 flow [2023-08-30 10:08:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-30 10:08:12,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2023-08-30 10:08:12,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-30 10:08:12,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-30 10:08:12,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:12,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-30 10:08:12,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 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 10:08:12,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 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 10:08:12,894 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 74 flow. Second operand 3 states and 345 transitions. [2023-08-30 10:08:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 151 flow [2023-08-30 10:08:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:12,896 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 70 flow [2023-08-30 10:08:12,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-30 10:08:12,897 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2023-08-30 10:08:12,897 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 70 flow [2023-08-30 10:08:12,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:12,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:12,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 10:08:12,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:12,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash -666943702, now seen corresponding path program 1 times [2023-08-30 10:08:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281171445] [2023-08-30 10:08:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:12,983 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 10:08:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281171445] [2023-08-30 10:08:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281171445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:08:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205579407] [2023-08-30 10:08:12,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:13,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-30 10:08:13,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:13,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-30 10:08:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:13,119 INFO L130 PetriNetUnfolder]: 77/199 cut-off events. [2023-08-30 10:08:13,120 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 10:08:13,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 199 events. 77/199 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 752 event pairs, 32 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 396. Up to 98 conditions per place. [2023-08-30 10:08:13,122 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 34 selfloop transitions, 8 changer transitions 2/47 dead transitions. [2023-08-30 10:08:13,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 206 flow [2023-08-30 10:08:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-30 10:08:13,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2023-08-30 10:08:13,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-30 10:08:13,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-30 10:08:13,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:13,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-30 10:08:13,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,128 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 70 flow. Second operand 5 states and 555 transitions. [2023-08-30 10:08:13,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 206 flow [2023-08-30 10:08:13,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:13,131 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 107 flow [2023-08-30 10:08:13,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-30 10:08:13,132 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 10:08:13,132 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 107 flow [2023-08-30 10:08:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:13,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:13,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 10:08:13,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:13,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash -666943725, now seen corresponding path program 1 times [2023-08-30 10:08:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846709204] [2023-08-30 10:08:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:13,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:13,311 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 10:08:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846709204] [2023-08-30 10:08:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846709204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:13,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:13,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114549705] [2023-08-30 10:08:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:13,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:13,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:13,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:13,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 234 [2023-08-30 10:08:13,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:13,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 234 [2023-08-30 10:08:13,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:13,529 INFO L130 PetriNetUnfolder]: 69/181 cut-off events. [2023-08-30 10:08:13,530 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-30 10:08:13,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 181 events. 69/181 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 655 event pairs, 14 based on Foata normal form. 8/187 useless extension candidates. Maximal degree in co-relation 411. Up to 58 conditions per place. [2023-08-30 10:08:13,531 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 39 selfloop transitions, 6 changer transitions 5/53 dead transitions. [2023-08-30 10:08:13,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 264 flow [2023-08-30 10:08:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-08-30 10:08:13,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2023-08-30 10:08:13,532 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-08-30 10:08:13,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-08-30 10:08:13,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:13,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-08-30 10:08:13,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,536 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 107 flow. Second operand 5 states and 549 transitions. [2023-08-30 10:08:13,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 264 flow [2023-08-30 10:08:13,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:13,538 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 106 flow [2023-08-30 10:08:13,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 10:08:13,539 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-30 10:08:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 106 flow [2023-08-30 10:08:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:13,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:13,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 10:08:13,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:13,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -26311253, now seen corresponding path program 1 times [2023-08-30 10:08:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558534969] [2023-08-30 10:08:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:13,811 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 10:08:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558534969] [2023-08-30 10:08:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558534969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83962567] [2023-08-30 10:08:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:13,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:13,815 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 10:08:13,818 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 10:08:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 10:08:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:13,947 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:13,948 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 10:08:14,021 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 10:08:14,071 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 10:08:14,098 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 10:08:14,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:14,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83962567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:14,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:14,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-30 10:08:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974817088] [2023-08-30 10:08:14,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:14,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:14,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 10:08:14,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 234 [2023-08-30 10:08:14,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:14,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 234 [2023-08-30 10:08:14,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:14,231 INFO L130 PetriNetUnfolder]: 63/157 cut-off events. [2023-08-30 10:08:14,231 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 10:08:14,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 157 events. 63/157 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 502 event pairs, 39 based on Foata normal form. 1/155 useless extension candidates. Maximal degree in co-relation 381. Up to 95 conditions per place. [2023-08-30 10:08:14,232 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 32 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-08-30 10:08:14,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 201 flow [2023-08-30 10:08:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-08-30 10:08:14,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2023-08-30 10:08:14,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-08-30 10:08:14,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-08-30 10:08:14,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:14,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-08-30 10:08:14,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,238 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 106 flow. Second operand 5 states and 531 transitions. [2023-08-30 10:08:14,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 201 flow [2023-08-30 10:08:14,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:08:14,242 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 94 flow [2023-08-30 10:08:14,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-30 10:08:14,243 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-30 10:08:14,243 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 94 flow [2023-08-30 10:08:14,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:14,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:14,250 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 10:08:14,448 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 10:08:14,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:14,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash -26261056, now seen corresponding path program 1 times [2023-08-30 10:08:14,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:14,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998013799] [2023-08-30 10:08:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:14,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:14,582 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 10:08:14,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998013799] [2023-08-30 10:08:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998013799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933462468] [2023-08-30 10:08:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:14,584 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 10:08:14,586 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 10:08:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 10:08:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:14,666 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:14,666 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 10:08:14,687 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 10:08:14,747 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 10:08:14,785 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 10:08:14,799 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 10:08:14,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:14,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933462468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:14,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:14,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:08:14,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349646313] [2023-08-30 10:08:14,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:14,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:14,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:14,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:14,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:08:14,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-30 10:08:14,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 94 flow. Second operand has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:14,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-30 10:08:14,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:14,939 INFO L130 PetriNetUnfolder]: 63/155 cut-off events. [2023-08-30 10:08:14,939 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-08-30 10:08:14,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 155 events. 63/155 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 487 event pairs, 15 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 369. Up to 59 conditions per place. [2023-08-30 10:08:14,941 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 36 selfloop transitions, 4 changer transitions 2/44 dead transitions. [2023-08-30 10:08:14,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 217 flow [2023-08-30 10:08:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 547 transitions. [2023-08-30 10:08:14,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675213675213675 [2023-08-30 10:08:14,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 547 transitions. [2023-08-30 10:08:14,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 547 transitions. [2023-08-30 10:08:14,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:14,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 547 transitions. [2023-08-30 10:08:14,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,946 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,946 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 94 flow. Second operand 5 states and 547 transitions. [2023-08-30 10:08:14,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 217 flow [2023-08-30 10:08:14,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:08:14,947 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 77 flow [2023-08-30 10:08:14,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-08-30 10:08:14,949 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 10:08:14,949 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 77 flow [2023-08-30 10:08:14,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:14,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:14,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:14,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 10:08:15,154 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 10:08:15,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-08-30 10:08:15,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1485385060, now seen corresponding path program 1 times [2023-08-30 10:08:15,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:15,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257996221] [2023-08-30 10:08:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:15,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:15,195 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 10:08:15,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257996221] [2023-08-30 10:08:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257996221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765490093] [2023-08-30 10:08:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:15,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:15,199 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 10:08:15,202 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 10:08:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:08:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:15,279 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 10:08:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:15,294 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 10:08:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765490093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:15,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 10:08:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060673310] [2023-08-30 10:08:15,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:08:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:08:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 10:08:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-30 10:08:15,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 77 flow. Second operand has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:15,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-30 10:08:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:15,326 INFO L130 PetriNetUnfolder]: 10/35 cut-off events. [2023-08-30 10:08:15,326 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 10:08:15,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 35 events. 10/35 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 11/46 useless extension candidates. Maximal degree in co-relation 88. Up to 21 conditions per place. [2023-08-30 10:08:15,326 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-30 10:08:15,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 135 flow [2023-08-30 10:08:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 453 transitions. [2023-08-30 10:08:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2023-08-30 10:08:15,328 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 453 transitions. [2023-08-30 10:08:15,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 453 transitions. [2023-08-30 10:08:15,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:15,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 453 transitions. [2023-08-30 10:08:15,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,330 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,330 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 77 flow. Second operand 4 states and 453 transitions. [2023-08-30 10:08:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 135 flow [2023-08-30 10:08:15,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 114 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 10:08:15,331 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-30 10:08:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-30 10:08:15,331 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -12 predicate places. [2023-08-30 10:08:15,331 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-30 10:08:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:15,333 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2023-08-30 10:08:15,334 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2023-08-30 10:08:15,335 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2023-08-30 10:08:15,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:15,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:15,540 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:08:15,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 10:08:15,551 INFO L130 PetriNetUnfolder]: 17/160 cut-off events. [2023-08-30 10:08:15,551 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 10:08:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 160 events. 17/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 379 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 10:08:15,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 10:08:15,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 117 transitions, 239 flow [2023-08-30 10:08:15,552 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:15,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 117 transitions, 239 flow [2023-08-30 10:08:15,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 117 transitions, 239 flow [2023-08-30 10:08:15,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 117 transitions, 239 flow [2023-08-30 10:08:15,559 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2023-08-30 10:08:15,559 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:15,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 364 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 10:08:15,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-30 10:08:17,767 INFO L134 LiptonReduction]: Checked pairs total: 6191 [2023-08-30 10:08:17,767 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-30 10:08:17,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:08:17,769 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:17,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:08:17,771 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-08-30 10:08:17,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:17,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:17,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 10:08:17,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:08:17,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash 157127765, now seen corresponding path program 1 times [2023-08-30 10:08:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445876724] [2023-08-30 10:08:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:17,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:08:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:17,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:08:17,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:08:17,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:08:17,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 10:08:17,793 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:08:17,794 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:08:17,794 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:08:17,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 10:08:17,804 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 10:08:17,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,820 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2023-08-30 10:08:17,820 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:08:17,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 832 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-30 10:08:17,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:17,822 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:17,837 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2023-08-30 10:08:17,837 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:08:17,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 832 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-30 10:08:17,842 INFO L119 LiptonReduction]: Number of co-enabled transitions 11760 [2023-08-30 10:08:20,348 INFO L134 LiptonReduction]: Checked pairs total: 24031 [2023-08-30 10:08:20,348 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 10:08:20,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:08:20,349 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:20,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-30 10:08:20,351 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 10:08:20,351 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:20,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:20,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:08:20,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:20,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 892608627, now seen corresponding path program 1 times [2023-08-30 10:08:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491874925] [2023-08-30 10:08:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:20,379 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 10:08:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491874925] [2023-08-30 10:08:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491874925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:08:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575467161] [2023-08-30 10:08:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:20,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2023-08-30 10:08:20,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:20,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2023-08-30 10:08:20,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:20,762 INFO L130 PetriNetUnfolder]: 4085/6818 cut-off events. [2023-08-30 10:08:20,762 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 10:08:20,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13435 conditions, 6818 events. 4085/6818 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 43292 event pairs, 4069 based on Foata normal form. 656/5434 useless extension candidates. Maximal degree in co-relation 10720. Up to 6533 conditions per place. [2023-08-30 10:08:20,786 INFO L137 encePairwiseOnDemand]: 292/308 looper letters, 43 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 10:08:20,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 208 flow [2023-08-30 10:08:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-30 10:08:20,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248917748917749 [2023-08-30 10:08:20,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-30 10:08:20,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-30 10:08:20,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:20,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-30 10:08:20,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 10:08:20,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,791 INFO L175 Difference]: Start difference. First operand has 55 places, 66 transitions, 150 flow. Second operand 3 states and 485 transitions. [2023-08-30 10:08:20,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 208 flow [2023-08-30 10:08:20,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:20,792 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 122 flow [2023-08-30 10:08:20,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-30 10:08:20,793 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-08-30 10:08:20,793 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 122 flow [2023-08-30 10:08:20,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:20,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:08:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 10:08:20,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:20,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 892608660, now seen corresponding path program 1 times [2023-08-30 10:08:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:20,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916339525] [2023-08-30 10:08:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:20,813 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 10:08:20,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916339525] [2023-08-30 10:08:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916339525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:20,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:08:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291090846] [2023-08-30 10:08:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:20,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2023-08-30 10:08:20,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:20,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:20,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2023-08-30 10:08:20,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:21,225 INFO L130 PetriNetUnfolder]: 4071/6813 cut-off events. [2023-08-30 10:08:21,225 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 10:08:21,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13422 conditions, 6813 events. 4071/6813 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 44099 event pairs, 1898 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 13414. Up to 6486 conditions per place. [2023-08-30 10:08:21,261 INFO L137 encePairwiseOnDemand]: 304/308 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-30 10:08:21,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 270 flow [2023-08-30 10:08:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-30 10:08:21,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270562770562771 [2023-08-30 10:08:21,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-30 10:08:21,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-30 10:08:21,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:21,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-30 10:08:21,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,269 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 122 flow. Second operand 3 states and 487 transitions. [2023-08-30 10:08:21,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 270 flow [2023-08-30 10:08:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:21,273 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 135 flow [2023-08-30 10:08:21,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-30 10:08:21,274 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 10:08:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 135 flow [2023-08-30 10:08:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:21,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 10:08:21,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:21,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1190630499, now seen corresponding path program 1 times [2023-08-30 10:08:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661889675] [2023-08-30 10:08:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:21,344 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 10:08:21,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661889675] [2023-08-30 10:08:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661889675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:21,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:21,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:08:21,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327071061] [2023-08-30 10:08:21,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:21,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:21,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:21,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:21,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 308 [2023-08-30 10:08:21,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:21,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 308 [2023-08-30 10:08:21,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:21,726 INFO L130 PetriNetUnfolder]: 3643/6095 cut-off events. [2023-08-30 10:08:21,726 INFO L131 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2023-08-30 10:08:21,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12592 conditions, 6095 events. 3643/6095 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 38418 event pairs, 1384 based on Foata normal form. 0/4617 useless extension candidates. Maximal degree in co-relation 12582. Up to 5355 conditions per place. [2023-08-30 10:08:21,776 INFO L137 encePairwiseOnDemand]: 300/308 looper letters, 67 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2023-08-30 10:08:21,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 351 flow [2023-08-30 10:08:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-08-30 10:08:21,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2023-08-30 10:08:21,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-08-30 10:08:21,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-08-30 10:08:21,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:21,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-08-30 10:08:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,782 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 135 flow. Second operand 4 states and 623 transitions. [2023-08-30 10:08:21,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 351 flow [2023-08-30 10:08:21,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:21,785 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 184 flow [2023-08-30 10:08:21,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-30 10:08:21,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-30 10:08:21,786 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 184 flow [2023-08-30 10:08:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:21,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:08:21,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 10:08:21,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:21,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1206506432, now seen corresponding path program 1 times [2023-08-30 10:08:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348498630] [2023-08-30 10:08:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:21,806 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 10:08:21,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:21,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348498630] [2023-08-30 10:08:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348498630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:21,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:21,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:08:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856235482] [2023-08-30 10:08:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:21,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:21,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:21,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 308 [2023-08-30 10:08:21,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:21,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:21,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 308 [2023-08-30 10:08:21,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:22,214 INFO L130 PetriNetUnfolder]: 3319/5437 cut-off events. [2023-08-30 10:08:22,214 INFO L131 PetriNetUnfolder]: For 992/992 co-relation queries the response was YES. [2023-08-30 10:08:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12520 conditions, 5437 events. 3319/5437 cut-off events. For 992/992 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 35019 event pairs, 493 based on Foata normal form. 0/4606 useless extension candidates. Maximal degree in co-relation 12507. Up to 4479 conditions per place. [2023-08-30 10:08:22,241 INFO L137 encePairwiseOnDemand]: 304/308 looper letters, 74 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-30 10:08:22,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 420 flow [2023-08-30 10:08:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-30 10:08:22,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2023-08-30 10:08:22,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-30 10:08:22,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-30 10:08:22,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:22,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-30 10:08:22,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,248 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 184 flow. Second operand 3 states and 494 transitions. [2023-08-30 10:08:22,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 420 flow [2023-08-30 10:08:22,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 420 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:22,253 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 196 flow [2023-08-30 10:08:22,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 10:08:22,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-30 10:08:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 196 flow [2023-08-30 10:08:22,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:22,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:22,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 10:08:22,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:22,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -485424865, now seen corresponding path program 1 times [2023-08-30 10:08:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160741955] [2023-08-30 10:08:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:22,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:22,374 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 10:08:22,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:22,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160741955] [2023-08-30 10:08:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160741955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:22,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:22,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:22,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308056219] [2023-08-30 10:08:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:22,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:22,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:22,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 308 [2023-08-30 10:08:22,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:22,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 308 [2023-08-30 10:08:22,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:22,959 INFO L130 PetriNetUnfolder]: 4528/7724 cut-off events. [2023-08-30 10:08:22,959 INFO L131 PetriNetUnfolder]: For 3222/3222 co-relation queries the response was YES. [2023-08-30 10:08:22,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18115 conditions, 7724 events. 4528/7724 cut-off events. For 3222/3222 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 51954 event pairs, 883 based on Foata normal form. 0/6698 useless extension candidates. Maximal degree in co-relation 18099. Up to 4313 conditions per place. [2023-08-30 10:08:22,986 INFO L137 encePairwiseOnDemand]: 291/308 looper letters, 158 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2023-08-30 10:08:22,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 193 transitions, 995 flow [2023-08-30 10:08:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:08:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:08:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1374 transitions. [2023-08-30 10:08:22,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49567099567099565 [2023-08-30 10:08:22,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1374 transitions. [2023-08-30 10:08:22,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1374 transitions. [2023-08-30 10:08:22,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:22,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1374 transitions. [2023-08-30 10:08:22,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.66666666666666) internal successors, (1374), 9 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 308.0) internal successors, (3080), 10 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,995 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 308.0) internal successors, (3080), 10 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:22,995 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 196 flow. Second operand 9 states and 1374 transitions. [2023-08-30 10:08:22,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 193 transitions, 995 flow [2023-08-30 10:08:22,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 193 transitions, 977 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:23,003 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 424 flow [2023-08-30 10:08:23,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2023-08-30 10:08:23,003 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2023-08-30 10:08:23,004 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 424 flow [2023-08-30 10:08:23,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:23,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:23,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 10:08:23,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:23,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -485424856, now seen corresponding path program 1 times [2023-08-30 10:08:23,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:23,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449971885] [2023-08-30 10:08:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:23,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:23,066 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 10:08:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449971885] [2023-08-30 10:08:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449971885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:23,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:23,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:08:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94086809] [2023-08-30 10:08:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:23,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 308 [2023-08-30 10:08:23,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:23,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 308 [2023-08-30 10:08:23,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:23,608 INFO L130 PetriNetUnfolder]: 4656/8250 cut-off events. [2023-08-30 10:08:23,609 INFO L131 PetriNetUnfolder]: For 10159/10159 co-relation queries the response was YES. [2023-08-30 10:08:23,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23896 conditions, 8250 events. 4656/8250 cut-off events. For 10159/10159 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 58249 event pairs, 1671 based on Foata normal form. 417/8550 useless extension candidates. Maximal degree in co-relation 23873. Up to 4568 conditions per place. [2023-08-30 10:08:23,646 INFO L137 encePairwiseOnDemand]: 296/308 looper letters, 96 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2023-08-30 10:08:23,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 128 transitions, 903 flow [2023-08-30 10:08:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 10:08:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2023-08-30 10:08:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 10:08:23,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 10:08:23,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:23,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 10:08:23,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 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 10:08:23,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,651 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 424 flow. Second operand 3 states and 501 transitions. [2023-08-30 10:08:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 128 transitions, 903 flow [2023-08-30 10:08:23,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 886 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:23,667 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 653 flow [2023-08-30 10:08:23,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=653, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2023-08-30 10:08:23,668 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2023-08-30 10:08:23,668 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 653 flow [2023-08-30 10:08:23,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:23,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:23,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:23,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 10:08:23,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:23,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1774487224, now seen corresponding path program 1 times [2023-08-30 10:08:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:23,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602586852] [2023-08-30 10:08:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:23,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:23,775 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 10:08:23,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:23,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602586852] [2023-08-30 10:08:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602586852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352572240] [2023-08-30 10:08:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:23,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:23,777 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 10:08:23,779 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 10:08:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 10:08:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:23,861 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:23,861 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 10:08:23,877 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 10:08:23,936 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 10:08:23,962 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 10:08:23,972 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 10:08:23,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352572240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:23,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:23,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:08:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949668554] [2023-08-30 10:08:23,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:08:24,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 308 [2023-08-30 10:08:24,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 653 flow. Second operand has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:24,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 308 [2023-08-30 10:08:24,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:24,708 INFO L130 PetriNetUnfolder]: 4515/8037 cut-off events. [2023-08-30 10:08:24,708 INFO L131 PetriNetUnfolder]: For 15346/15346 co-relation queries the response was YES. [2023-08-30 10:08:24,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25625 conditions, 8037 events. 4515/8037 cut-off events. For 15346/15346 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 56017 event pairs, 1502 based on Foata normal form. 73/8000 useless extension candidates. Maximal degree in co-relation 25599. Up to 6198 conditions per place. [2023-08-30 10:08:24,736 INFO L137 encePairwiseOnDemand]: 300/308 looper letters, 141 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2023-08-30 10:08:24,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 170 transitions, 1398 flow [2023-08-30 10:08:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:08:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:08:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 905 transitions. [2023-08-30 10:08:24,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897186147186147 [2023-08-30 10:08:24,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 905 transitions. [2023-08-30 10:08:24,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 905 transitions. [2023-08-30 10:08:24,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:24,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 905 transitions. [2023-08-30 10:08:24,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 308.0) internal successors, (2156), 7 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 308.0) internal successors, (2156), 7 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,744 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 653 flow. Second operand 6 states and 905 transitions. [2023-08-30 10:08:24,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 170 transitions, 1398 flow [2023-08-30 10:08:24,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 170 transitions, 1326 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:24,764 INFO L231 Difference]: Finished difference. Result has 84 places, 108 transitions, 792 flow [2023-08-30 10:08:24,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=792, PETRI_PLACES=84, PETRI_TRANSITIONS=108} [2023-08-30 10:08:24,765 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2023-08-30 10:08:24,765 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 108 transitions, 792 flow [2023-08-30 10:08:24,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:24,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:24,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:24,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 10:08:24,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 10:08:24,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:24,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1774641613, now seen corresponding path program 1 times [2023-08-30 10:08:24,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:24,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666942479] [2023-08-30 10:08:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:24,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:25,069 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 10:08:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666942479] [2023-08-30 10:08:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666942479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093057746] [2023-08-30 10:08:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:25,071 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 10:08:25,073 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 10:08:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 10:08:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:25,140 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:25,141 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 10:08:25,171 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 10:08:25,186 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 10:08:25,195 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 10:08:25,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093057746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:25,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:25,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 10:08:25,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774146987] [2023-08-30 10:08:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 10:08:25,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 308 [2023-08-30 10:08:25,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 108 transitions, 792 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:25,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 308 [2023-08-30 10:08:25,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:25,836 INFO L130 PetriNetUnfolder]: 4373/7780 cut-off events. [2023-08-30 10:08:25,836 INFO L131 PetriNetUnfolder]: For 15123/15123 co-relation queries the response was YES. [2023-08-30 10:08:25,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25047 conditions, 7780 events. 4373/7780 cut-off events. For 15123/15123 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 53897 event pairs, 2404 based on Foata normal form. 75/7730 useless extension candidates. Maximal degree in co-relation 25019. Up to 5140 conditions per place. [2023-08-30 10:08:25,868 INFO L137 encePairwiseOnDemand]: 299/308 looper letters, 151 selfloop transitions, 19 changer transitions 8/185 dead transitions. [2023-08-30 10:08:25,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 185 transitions, 1568 flow [2023-08-30 10:08:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2023-08-30 10:08:25,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-08-30 10:08:25,870 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2023-08-30 10:08:25,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2023-08-30 10:08:25,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:25,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2023-08-30 10:08:25,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 10:08:25,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,873 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,873 INFO L175 Difference]: Start difference. First operand has 84 places, 108 transitions, 792 flow. Second operand 5 states and 792 transitions. [2023-08-30 10:08:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 185 transitions, 1568 flow [2023-08-30 10:08:25,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 185 transitions, 1550 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:25,893 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 859 flow [2023-08-30 10:08:25,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=859, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2023-08-30 10:08:25,894 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2023-08-30 10:08:25,894 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 859 flow [2023-08-30 10:08:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:25,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:25,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:25,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 10:08:26,098 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,SelfDestructingSolverStorable15 [2023-08-30 10:08:26,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:26,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1793116782, now seen corresponding path program 1 times [2023-08-30 10:08:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:26,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975346020] [2023-08-30 10:08:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:26,215 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 10:08:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:26,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975346020] [2023-08-30 10:08:26,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975346020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:26,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321773618] [2023-08-30 10:08:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:26,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:26,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:26,217 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 10:08:26,249 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 10:08:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 10:08:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:26,311 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:26,312 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 10:08:26,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:08:26,348 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 10:08:26,402 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 10:08:26,418 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 10:08:26,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:26,457 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_328 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_328) c_~g1~0.base) c_~g1~0.offset)))) is different from false [2023-08-30 10:08:26,476 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 10:08:26,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321773618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:26,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:26,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:08:26,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171865170] [2023-08-30 10:08:26,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:08:26,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:08:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=112, Unknown=1, NotChecked=22, Total=182 [2023-08-30 10:08:26,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 308 [2023-08-30 10:08:26,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 859 flow. Second operand has 14 states, 14 states have (on average 112.57142857142857) internal successors, (1576), 14 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:26,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:26,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 308 [2023-08-30 10:08:26,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:27,701 INFO L130 PetriNetUnfolder]: 5173/9239 cut-off events. [2023-08-30 10:08:27,701 INFO L131 PetriNetUnfolder]: For 23271/23271 co-relation queries the response was YES. [2023-08-30 10:08:27,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 9239 events. 5173/9239 cut-off events. For 23271/23271 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 66528 event pairs, 854 based on Foata normal form. 268/9376 useless extension candidates. Maximal degree in co-relation 30661. Up to 4428 conditions per place. [2023-08-30 10:08:27,747 INFO L137 encePairwiseOnDemand]: 291/308 looper letters, 296 selfloop transitions, 107 changer transitions 8/418 dead transitions. [2023-08-30 10:08:27,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 418 transitions, 3288 flow [2023-08-30 10:08:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 10:08:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 10:08:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2522 transitions. [2023-08-30 10:08:27,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094155844155844 [2023-08-30 10:08:27,752 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2522 transitions. [2023-08-30 10:08:27,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2522 transitions. [2023-08-30 10:08:27,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:27,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2522 transitions. [2023-08-30 10:08:27,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.1) internal successors, (2522), 20 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:27,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 308.0) internal successors, (6468), 21 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:27,763 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 308.0) internal successors, (6468), 21 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:27,763 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 859 flow. Second operand 20 states and 2522 transitions. [2023-08-30 10:08:27,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 418 transitions, 3288 flow [2023-08-30 10:08:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 418 transitions, 3247 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:27,841 INFO L231 Difference]: Finished difference. Result has 117 places, 187 transitions, 1996 flow [2023-08-30 10:08:27,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1996, PETRI_PLACES=117, PETRI_TRANSITIONS=187} [2023-08-30 10:08:27,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2023-08-30 10:08:27,842 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 187 transitions, 1996 flow [2023-08-30 10:08:27,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 112.57142857142857) internal successors, (1576), 14 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:27,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:27,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:27,850 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 10:08:28,048 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,SelfDestructingSolverStorable16 [2023-08-30 10:08:28,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:28,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1532666457, now seen corresponding path program 1 times [2023-08-30 10:08:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:28,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266080643] [2023-08-30 10:08:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:28,125 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 10:08:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266080643] [2023-08-30 10:08:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266080643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:28,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:28,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:08:28,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798027032] [2023-08-30 10:08:28,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:28,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 308 [2023-08-30 10:08:28,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 187 transitions, 1996 flow. Second operand has 4 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 10:08:28,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:28,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 308 [2023-08-30 10:08:28,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:28,335 INFO L130 PetriNetUnfolder]: 437/1255 cut-off events. [2023-08-30 10:08:28,336 INFO L131 PetriNetUnfolder]: For 5250/5250 co-relation queries the response was YES. [2023-08-30 10:08:28,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 1255 events. 437/1255 cut-off events. For 5250/5250 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8180 event pairs, 91 based on Foata normal form. 198/1379 useless extension candidates. Maximal degree in co-relation 4885. Up to 962 conditions per place. [2023-08-30 10:08:28,340 INFO L137 encePairwiseOnDemand]: 301/308 looper letters, 97 selfloop transitions, 7 changer transitions 5/116 dead transitions. [2023-08-30 10:08:28,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 1225 flow [2023-08-30 10:08:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 606 transitions. [2023-08-30 10:08:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49188311688311687 [2023-08-30 10:08:28,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 606 transitions. [2023-08-30 10:08:28,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 606 transitions. [2023-08-30 10:08:28,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:28,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 606 transitions. [2023-08-30 10:08:28,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,345 INFO L175 Difference]: Start difference. First operand has 117 places, 187 transitions, 1996 flow. Second operand 4 states and 606 transitions. [2023-08-30 10:08:28,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 1225 flow [2023-08-30 10:08:28,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 116 transitions, 1061 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-08-30 10:08:28,360 INFO L231 Difference]: Finished difference. Result has 108 places, 97 transitions, 717 flow [2023-08-30 10:08:28,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=717, PETRI_PLACES=108, PETRI_TRANSITIONS=97} [2023-08-30 10:08:28,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2023-08-30 10:08:28,360 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 97 transitions, 717 flow [2023-08-30 10:08:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 10:08:28,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:28,361 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 10:08:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 10:08:28,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:28,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash 379997927, now seen corresponding path program 1 times [2023-08-30 10:08:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379371578] [2023-08-30 10:08:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:28,444 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 10:08:28,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:28,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379371578] [2023-08-30 10:08:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379371578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:28,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:28,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227190095] [2023-08-30 10:08:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:28,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 308 [2023-08-30 10:08:28,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 97 transitions, 717 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:28,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 308 [2023-08-30 10:08:28,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:28,689 INFO L130 PetriNetUnfolder]: 480/1359 cut-off events. [2023-08-30 10:08:28,689 INFO L131 PetriNetUnfolder]: For 4110/4110 co-relation queries the response was YES. [2023-08-30 10:08:28,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4960 conditions, 1359 events. 480/1359 cut-off events. For 4110/4110 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8768 event pairs, 220 based on Foata normal form. 12/1289 useless extension candidates. Maximal degree in co-relation 4922. Up to 505 conditions per place. [2023-08-30 10:08:28,693 INFO L137 encePairwiseOnDemand]: 296/308 looper letters, 114 selfloop transitions, 37 changer transitions 11/169 dead transitions. [2023-08-30 10:08:28,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 169 transitions, 1404 flow [2023-08-30 10:08:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1073 transitions. [2023-08-30 10:08:28,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976808905380334 [2023-08-30 10:08:28,696 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1073 transitions. [2023-08-30 10:08:28,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1073 transitions. [2023-08-30 10:08:28,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:28,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1073 transitions. [2023-08-30 10:08:28,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,699 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,699 INFO L175 Difference]: Start difference. First operand has 108 places, 97 transitions, 717 flow. Second operand 7 states and 1073 transitions. [2023-08-30 10:08:28,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 169 transitions, 1404 flow [2023-08-30 10:08:28,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 169 transitions, 1366 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 10:08:28,709 INFO L231 Difference]: Finished difference. Result has 112 places, 98 transitions, 815 flow [2023-08-30 10:08:28,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=112, PETRI_TRANSITIONS=98} [2023-08-30 10:08:28,710 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2023-08-30 10:08:28,710 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 98 transitions, 815 flow [2023-08-30 10:08:28,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:28,710 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 10:08:28,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 10:08:28,710 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:28,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -954424696, now seen corresponding path program 1 times [2023-08-30 10:08:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:28,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305047869] [2023-08-30 10:08:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:28,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:28,776 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 10:08:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305047869] [2023-08-30 10:08:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305047869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:28,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:08:28,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708097116] [2023-08-30 10:08:28,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:08:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:08:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:28,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 308 [2023-08-30 10:08:28,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 98 transitions, 815 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:28,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:28,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 308 [2023-08-30 10:08:28,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:29,065 INFO L130 PetriNetUnfolder]: 465/1312 cut-off events. [2023-08-30 10:08:29,065 INFO L131 PetriNetUnfolder]: For 5188/5188 co-relation queries the response was YES. [2023-08-30 10:08:29,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4904 conditions, 1312 events. 465/1312 cut-off events. For 5188/5188 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8367 event pairs, 206 based on Foata normal form. 12/1243 useless extension candidates. Maximal degree in co-relation 4864. Up to 545 conditions per place. [2023-08-30 10:08:29,070 INFO L137 encePairwiseOnDemand]: 295/308 looper letters, 111 selfloop transitions, 42 changer transitions 3/163 dead transitions. [2023-08-30 10:08:29,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1448 flow [2023-08-30 10:08:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 10:08:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 10:08:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1055 transitions. [2023-08-30 10:08:29,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893320964749536 [2023-08-30 10:08:29,073 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1055 transitions. [2023-08-30 10:08:29,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1055 transitions. [2023-08-30 10:08:29,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:29,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1055 transitions. [2023-08-30 10:08:29,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,078 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,078 INFO L175 Difference]: Start difference. First operand has 112 places, 98 transitions, 815 flow. Second operand 7 states and 1055 transitions. [2023-08-30 10:08:29,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1448 flow [2023-08-30 10:08:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1385 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 10:08:29,090 INFO L231 Difference]: Finished difference. Result has 118 places, 107 transitions, 1001 flow [2023-08-30 10:08:29,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1001, PETRI_PLACES=118, PETRI_TRANSITIONS=107} [2023-08-30 10:08:29,091 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2023-08-30 10:08:29,091 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 107 transitions, 1001 flow [2023-08-30 10:08:29,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:29,091 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 10:08:29,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 10:08:29,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:29,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash -246076277, now seen corresponding path program 1 times [2023-08-30 10:08:29,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067806199] [2023-08-30 10:08:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:29,241 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 10:08:29,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067806199] [2023-08-30 10:08:29,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067806199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219520262] [2023-08-30 10:08:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:29,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:29,242 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 10:08:29,244 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 10:08:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:29,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:29,321 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:29,322 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 10:08:29,357 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 10:08:29,398 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 10:08:29,423 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 10:08:29,443 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 10:08:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:29,489 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_453 Int) (v_ArrVal_455 (Array Int Int))) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~g1~0.base (store (select |c_#memory_int| c_~g1~0.base) c_~g1~0.offset v_ArrVal_453)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_455) c_~g1~0.base) c_~g1~0.offset))) (< (+ v_ArrVal_453 1) |c_t_funThread1of2ForFork0_#t~mem8|))) is different from false [2023-08-30 10:08:29,501 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_453 Int) (v_ArrVal_455 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~g1~0.base))) (or (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| c_~g1~0.base (store .cse0 c_~g1~0.offset v_ArrVal_453)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_455) c_~g1~0.base) c_~g1~0.offset))) (< (+ v_ArrVal_453 1) (select .cse0 c_~g1~0.offset))))) is different from false [2023-08-30 10:08:29,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:29,518 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 10:08:29,520 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 10:08:29,549 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 10:08:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219520262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:29,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 10:08:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634608398] [2023-08-30 10:08:29,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:08:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:08:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=231, Unknown=3, NotChecked=66, Total=380 [2023-08-30 10:08:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 308 [2023-08-30 10:08:29,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 107 transitions, 1001 flow. Second operand has 20 states, 20 states have (on average 110.7) internal successors, (2214), 20 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:29,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:29,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 308 [2023-08-30 10:08:29,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:30,155 INFO L130 PetriNetUnfolder]: 455/1323 cut-off events. [2023-08-30 10:08:30,156 INFO L131 PetriNetUnfolder]: For 6295/6295 co-relation queries the response was YES. [2023-08-30 10:08:30,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 1323 events. 455/1323 cut-off events. For 6295/6295 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8451 event pairs, 124 based on Foata normal form. 12/1255 useless extension candidates. Maximal degree in co-relation 5075. Up to 295 conditions per place. [2023-08-30 10:08:30,163 INFO L137 encePairwiseOnDemand]: 294/308 looper letters, 158 selfloop transitions, 53 changer transitions 19/237 dead transitions. [2023-08-30 10:08:30,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 2163 flow [2023-08-30 10:08:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 10:08:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 10:08:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2007 transitions. [2023-08-30 10:08:30,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38330786860198623 [2023-08-30 10:08:30,166 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2007 transitions. [2023-08-30 10:08:30,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2007 transitions. [2023-08-30 10:08:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2007 transitions. [2023-08-30 10:08:30,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.05882352941177) internal successors, (2007), 17 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:30,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:30,176 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:30,176 INFO L175 Difference]: Start difference. First operand has 118 places, 107 transitions, 1001 flow. Second operand 17 states and 2007 transitions. [2023-08-30 10:08:30,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 2163 flow [2023-08-30 10:08:30,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 237 transitions, 2151 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:30,190 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 1288 flow [2023-08-30 10:08:30,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1288, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2023-08-30 10:08:30,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2023-08-30 10:08:30,191 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 1288 flow [2023-08-30 10:08:30,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.7) internal successors, (2214), 20 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:30,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:30,191 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 10:08:30,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 10:08:30,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:30,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:30,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:30,396 INFO L85 PathProgramCache]: Analyzing trace with hash -246076235, now seen corresponding path program 2 times [2023-08-30 10:08:30,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:30,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517784038] [2023-08-30 10:08:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:30,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:30,534 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 10:08:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517784038] [2023-08-30 10:08:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517784038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362054629] [2023-08-30 10:08:30,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:30,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:30,536 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 10:08:30,568 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 10:08:30,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:30,636 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:30,637 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 10:08:30,667 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 10:08:30,712 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 10:08:30,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 10:08:30,766 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 10:08:30,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:30,814 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_510 Int) (v_ArrVal_512 (Array Int Int))) (or (< (select (select (store (store |c_#memory_int| c_~g1~0.base (store (select |c_#memory_int| c_~g1~0.base) c_~g1~0.offset v_ArrVal_510)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_512) c_~g1~0.base) c_~g1~0.offset) 2147483647) (< |c_t_funThread1of2ForFork0_#t~mem8| (+ v_ArrVal_510 1)))) is different from false [2023-08-30 10:08:30,824 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_510 Int) (v_ArrVal_512 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~g1~0.base))) (or (< (select (select (store (store |c_#memory_int| c_~g1~0.base (store .cse0 c_~g1~0.offset v_ArrVal_510)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_512) c_~g1~0.base) c_~g1~0.offset) 2147483647) (< (select .cse0 c_~g1~0.offset) (+ v_ArrVal_510 1))))) is different from false [2023-08-30 10:08:30,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:30,853 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 10:08:30,854 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 10:08:30,869 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 10:08:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362054629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:30,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-30 10:08:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827699832] [2023-08-30 10:08:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:30,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 10:08:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 10:08:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=181, Unknown=2, NotChecked=58, Total=306 [2023-08-30 10:08:30,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 308 [2023-08-30 10:08:30,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 123 transitions, 1288 flow. Second operand has 18 states, 18 states have (on average 111.0) internal successors, (1998), 18 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:30,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:30,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 308 [2023-08-30 10:08:30,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:31,460 INFO L130 PetriNetUnfolder]: 420/1255 cut-off events. [2023-08-30 10:08:31,460 INFO L131 PetriNetUnfolder]: For 6898/6898 co-relation queries the response was YES. [2023-08-30 10:08:31,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1255 events. 420/1255 cut-off events. For 6898/6898 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8048 event pairs, 116 based on Foata normal form. 24/1203 useless extension candidates. Maximal degree in co-relation 5185. Up to 333 conditions per place. [2023-08-30 10:08:31,465 INFO L137 encePairwiseOnDemand]: 295/308 looper letters, 149 selfloop transitions, 46 changer transitions 14/216 dead transitions. [2023-08-30 10:08:31,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 216 transitions, 2059 flow [2023-08-30 10:08:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 10:08:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 10:08:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1883 transitions. [2023-08-30 10:08:31,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821022727272727 [2023-08-30 10:08:31,467 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1883 transitions. [2023-08-30 10:08:31,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1883 transitions. [2023-08-30 10:08:31,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:31,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1883 transitions. [2023-08-30 10:08:31,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.6875) internal successors, (1883), 16 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,473 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,474 INFO L175 Difference]: Start difference. First operand has 136 places, 123 transitions, 1288 flow. Second operand 16 states and 1883 transitions. [2023-08-30 10:08:31,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 216 transitions, 2059 flow [2023-08-30 10:08:31,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 216 transitions, 1918 flow, removed 43 selfloop flow, removed 12 redundant places. [2023-08-30 10:08:31,488 INFO L231 Difference]: Finished difference. Result has 137 places, 118 transitions, 1182 flow [2023-08-30 10:08:31,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1182, PETRI_PLACES=137, PETRI_TRANSITIONS=118} [2023-08-30 10:08:31,489 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2023-08-30 10:08:31,489 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 118 transitions, 1182 flow [2023-08-30 10:08:31,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 111.0) internal successors, (1998), 18 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:31,489 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 10:08:31,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 10:08:31,693 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,SelfDestructingSolverStorable21 [2023-08-30 10:08:31,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:31,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash -954424745, now seen corresponding path program 1 times [2023-08-30 10:08:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:31,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58410268] [2023-08-30 10:08:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:31,756 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 10:08:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:31,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58410268] [2023-08-30 10:08:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58410268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:31,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 10:08:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24347939] [2023-08-30 10:08:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:31,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 308 [2023-08-30 10:08:31,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 118 transitions, 1182 flow. Second operand has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:31,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 308 [2023-08-30 10:08:31,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:31,974 INFO L130 PetriNetUnfolder]: 409/1220 cut-off events. [2023-08-30 10:08:31,974 INFO L131 PetriNetUnfolder]: For 5787/5787 co-relation queries the response was YES. [2023-08-30 10:08:31,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 1220 events. 409/1220 cut-off events. For 5787/5787 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7772 event pairs, 222 based on Foata normal form. 13/1159 useless extension candidates. Maximal degree in co-relation 4779. Up to 546 conditions per place. [2023-08-30 10:08:31,979 INFO L137 encePairwiseOnDemand]: 298/308 looper letters, 113 selfloop transitions, 26 changer transitions 2/148 dead transitions. [2023-08-30 10:08:31,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 148 transitions, 1569 flow [2023-08-30 10:08:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 747 transitions. [2023-08-30 10:08:31,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850649350649351 [2023-08-30 10:08:31,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 747 transitions. [2023-08-30 10:08:31,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 747 transitions. [2023-08-30 10:08:31,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:31,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 747 transitions. [2023-08-30 10:08:31,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.4) internal successors, (747), 5 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,983 INFO L175 Difference]: Start difference. First operand has 137 places, 118 transitions, 1182 flow. Second operand 5 states and 747 transitions. [2023-08-30 10:08:31,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 148 transitions, 1569 flow [2023-08-30 10:08:31,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 148 transitions, 1431 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-08-30 10:08:31,997 INFO L231 Difference]: Finished difference. Result has 130 places, 117 transitions, 1133 flow [2023-08-30 10:08:31,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1133, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2023-08-30 10:08:31,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2023-08-30 10:08:31,997 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 1133 flow [2023-08-30 10:08:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:31,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:31,998 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 10:08:31,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 10:08:31,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:31,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash -404444507, now seen corresponding path program 2 times [2023-08-30 10:08:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:31,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075907792] [2023-08-30 10:08:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:31,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:32,173 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 10:08:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075907792] [2023-08-30 10:08:32,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075907792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463179633] [2023-08-30 10:08:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:32,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:32,175 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 10:08:32,178 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 10:08:32,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:32,272 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:32,272 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 10:08:32,305 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 10:08:32,316 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 10:08:32,348 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 10:08:32,368 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 10:08:32,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463179633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:32,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 10:08:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605886639] [2023-08-30 10:08:32,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 10:08:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 10:08:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 10:08:32,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 308 [2023-08-30 10:08:32,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 135.57142857142858) internal successors, (949), 7 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 10:08:32,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:32,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 308 [2023-08-30 10:08:32,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:32,724 INFO L130 PetriNetUnfolder]: 408/1221 cut-off events. [2023-08-30 10:08:32,724 INFO L131 PetriNetUnfolder]: For 5175/5175 co-relation queries the response was YES. [2023-08-30 10:08:32,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 1221 events. 408/1221 cut-off events. For 5175/5175 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7839 event pairs, 192 based on Foata normal form. 2/1147 useless extension candidates. Maximal degree in co-relation 4721. Up to 595 conditions per place. [2023-08-30 10:08:32,728 INFO L137 encePairwiseOnDemand]: 299/308 looper letters, 109 selfloop transitions, 38 changer transitions 5/159 dead transitions. [2023-08-30 10:08:32,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 159 transitions, 1563 flow [2023-08-30 10:08:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:08:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:08:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1426 transitions. [2023-08-30 10:08:32,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462987012987013 [2023-08-30 10:08:32,729 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1426 transitions. [2023-08-30 10:08:32,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1426 transitions. [2023-08-30 10:08:32,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:32,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1426 transitions. [2023-08-30 10:08:32,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.6) internal successors, (1426), 10 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:32,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:32,733 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:32,733 INFO L175 Difference]: Start difference. First operand has 130 places, 117 transitions, 1133 flow. Second operand 10 states and 1426 transitions. [2023-08-30 10:08:32,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 159 transitions, 1563 flow [2023-08-30 10:08:32,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1467 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-30 10:08:32,744 INFO L231 Difference]: Finished difference. Result has 130 places, 115 transitions, 1080 flow [2023-08-30 10:08:32,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1080, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2023-08-30 10:08:32,744 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2023-08-30 10:08:32,745 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 1080 flow [2023-08-30 10:08:32,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.57142857142858) internal successors, (949), 7 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 10:08:32,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:32,745 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 10:08:32,752 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 10:08:32,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 10:08:32,952 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:32,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -759778664, now seen corresponding path program 2 times [2023-08-30 10:08:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:32,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266980014] [2023-08-30 10:08:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:32,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:33,116 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 10:08:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266980014] [2023-08-30 10:08:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266980014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164585524] [2023-08-30 10:08:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:33,117 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 10:08:33,120 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 10:08:33,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:33,211 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:33,211 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 10:08:33,262 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 10:08:33,309 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 10:08:33,350 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 10:08:33,361 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 10:08:33,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:33,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164585524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:33,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:33,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2023-08-30 10:08:33,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461079499] [2023-08-30 10:08:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:08:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:08:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 10:08:33,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-30 10:08:33,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 1080 flow. Second operand has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:33,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:33,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-30 10:08:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:33,723 INFO L130 PetriNetUnfolder]: 406/1224 cut-off events. [2023-08-30 10:08:33,723 INFO L131 PetriNetUnfolder]: For 4697/4697 co-relation queries the response was YES. [2023-08-30 10:08:33,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4759 conditions, 1224 events. 406/1224 cut-off events. For 4697/4697 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7911 event pairs, 164 based on Foata normal form. 1/1151 useless extension candidates. Maximal degree in co-relation 4719. Up to 449 conditions per place. [2023-08-30 10:08:33,727 INFO L137 encePairwiseOnDemand]: 297/308 looper letters, 119 selfloop transitions, 46 changer transitions 5/177 dead transitions. [2023-08-30 10:08:33,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 177 transitions, 1728 flow [2023-08-30 10:08:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 10:08:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 10:08:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1141 transitions. [2023-08-30 10:08:33,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2023-08-30 10:08:33,729 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1141 transitions. [2023-08-30 10:08:33,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1141 transitions. [2023-08-30 10:08:33,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:33,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1141 transitions. [2023-08-30 10:08:33,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.625) internal successors, (1141), 8 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:33,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:33,732 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:33,732 INFO L175 Difference]: Start difference. First operand has 130 places, 115 transitions, 1080 flow. Second operand 8 states and 1141 transitions. [2023-08-30 10:08:33,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 177 transitions, 1728 flow [2023-08-30 10:08:33,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 1687 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 10:08:33,742 INFO L231 Difference]: Finished difference. Result has 135 places, 120 transitions, 1239 flow [2023-08-30 10:08:33,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1239, PETRI_PLACES=135, PETRI_TRANSITIONS=120} [2023-08-30 10:08:33,743 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2023-08-30 10:08:33,743 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 120 transitions, 1239 flow [2023-08-30 10:08:33,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:33,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:33,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:33,764 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 10:08:33,947 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,SelfDestructingSolverStorable24 [2023-08-30 10:08:33,947 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:33,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1047505273, now seen corresponding path program 1 times [2023-08-30 10:08:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:33,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104031472] [2023-08-30 10:08:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:33,991 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 10:08:33,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:33,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104031472] [2023-08-30 10:08:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104031472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:33,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001197255] [2023-08-30 10:08:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:33,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:34,005 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 10:08:34,020 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 10:08:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 10:08:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:34,141 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 10:08:34,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:34,169 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 10:08:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001197255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:34,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 10:08:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182095724] [2023-08-30 10:08:34,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:34,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 308 [2023-08-30 10:08:34,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 120 transitions, 1239 flow. Second operand has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:34,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:34,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 308 [2023-08-30 10:08:34,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:34,293 INFO L130 PetriNetUnfolder]: 139/451 cut-off events. [2023-08-30 10:08:34,294 INFO L131 PetriNetUnfolder]: For 2377/2377 co-relation queries the response was YES. [2023-08-30 10:08:34,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 451 events. 139/451 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2252 event pairs, 10 based on Foata normal form. 9/460 useless extension candidates. Maximal degree in co-relation 2151. Up to 247 conditions per place. [2023-08-30 10:08:34,296 INFO L137 encePairwiseOnDemand]: 305/308 looper letters, 108 selfloop transitions, 3 changer transitions 11/128 dead transitions. [2023-08-30 10:08:34,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 128 transitions, 1560 flow [2023-08-30 10:08:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:08:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:08:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 764 transitions. [2023-08-30 10:08:34,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2023-08-30 10:08:34,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 764 transitions. [2023-08-30 10:08:34,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 764 transitions. [2023-08-30 10:08:34,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:34,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 764 transitions. [2023-08-30 10:08:34,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.8) internal successors, (764), 5 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:34,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:34,300 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:34,301 INFO L175 Difference]: Start difference. First operand has 135 places, 120 transitions, 1239 flow. Second operand 5 states and 764 transitions. [2023-08-30 10:08:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 128 transitions, 1560 flow [2023-08-30 10:08:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 1345 flow, removed 1 selfloop flow, removed 18 redundant places. [2023-08-30 10:08:34,308 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 640 flow [2023-08-30 10:08:34,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=640, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2023-08-30 10:08:34,309 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2023-08-30 10:08:34,309 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 640 flow [2023-08-30 10:08:34,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:34,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:34,309 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 10:08:34,320 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 10:08:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 10:08:34,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:34,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -545179608, now seen corresponding path program 1 times [2023-08-30 10:08:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436470045] [2023-08-30 10:08:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:34,789 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 10:08:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436470045] [2023-08-30 10:08:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436470045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258768514] [2023-08-30 10:08:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:34,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:34,790 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 10:08:34,792 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 10:08:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:34,912 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:34,912 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 10:08:34,964 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 10:08:35,011 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 10:08:35,058 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 10:08:35,076 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 10:08:35,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:08:35,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 10:08:35,167 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 10:08:35,169 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 10:08:35,194 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 10:08:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258768514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:08:35,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:08:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-08-30 10:08:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201440240] [2023-08-30 10:08:35,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:08:35,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 10:08:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 10:08:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=298, Unknown=3, NotChecked=0, Total=380 [2023-08-30 10:08:35,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 308 [2023-08-30 10:08:35,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 640 flow. Second operand has 20 states, 20 states have (on average 129.15) internal successors, (2583), 20 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:35,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:35,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 308 [2023-08-30 10:08:35,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:36,095 INFO L130 PetriNetUnfolder]: 123/403 cut-off events. [2023-08-30 10:08:36,096 INFO L131 PetriNetUnfolder]: For 1730/1730 co-relation queries the response was YES. [2023-08-30 10:08:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 403 events. 123/403 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2062 event pairs, 31 based on Foata normal form. 4/407 useless extension candidates. Maximal degree in co-relation 1714. Up to 105 conditions per place. [2023-08-30 10:08:36,097 INFO L137 encePairwiseOnDemand]: 297/308 looper letters, 35 selfloop transitions, 7 changer transitions 53/101 dead transitions. [2023-08-30 10:08:36,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 1048 flow [2023-08-30 10:08:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 10:08:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 10:08:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1569 transitions. [2023-08-30 10:08:36,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424512987012987 [2023-08-30 10:08:36,101 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1569 transitions. [2023-08-30 10:08:36,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1569 transitions. [2023-08-30 10:08:36,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:36,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1569 transitions. [2023-08-30 10:08:36,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 130.75) internal successors, (1569), 12 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,105 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,105 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 640 flow. Second operand 12 states and 1569 transitions. [2023-08-30 10:08:36,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 1048 flow [2023-08-30 10:08:36,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 101 transitions, 993 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-30 10:08:36,109 INFO L231 Difference]: Finished difference. Result has 98 places, 43 transitions, 346 flow [2023-08-30 10:08:36,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=346, PETRI_PLACES=98, PETRI_TRANSITIONS=43} [2023-08-30 10:08:36,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-08-30 10:08:36,109 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 43 transitions, 346 flow [2023-08-30 10:08:36,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.15) internal successors, (2583), 20 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:36,110 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 10:08:36,128 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 10:08:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 10:08:36,317 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:36,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash -900248871, now seen corresponding path program 1 times [2023-08-30 10:08:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:36,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96657974] [2023-08-30 10:08:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:36,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:36,406 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 10:08:36,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96657974] [2023-08-30 10:08:36,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96657974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:36,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:36,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 10:08:36,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557924306] [2023-08-30 10:08:36,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:36,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:08:36,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:08:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:08:36,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 308 [2023-08-30 10:08:36,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 43 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:36,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 308 [2023-08-30 10:08:36,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:36,579 INFO L130 PetriNetUnfolder]: 37/154 cut-off events. [2023-08-30 10:08:36,579 INFO L131 PetriNetUnfolder]: For 446/446 co-relation queries the response was YES. [2023-08-30 10:08:36,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 154 events. 37/154 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 514 event pairs, 18 based on Foata normal form. 3/157 useless extension candidates. Maximal degree in co-relation 582. Up to 71 conditions per place. [2023-08-30 10:08:36,579 INFO L137 encePairwiseOnDemand]: 299/308 looper letters, 27 selfloop transitions, 14 changer transitions 10/57 dead transitions. [2023-08-30 10:08:36,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 57 transitions, 534 flow [2023-08-30 10:08:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 10:08:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 10:08:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1343 transitions. [2023-08-30 10:08:36,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43603896103896106 [2023-08-30 10:08:36,581 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1343 transitions. [2023-08-30 10:08:36,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1343 transitions. [2023-08-30 10:08:36,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:36,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1343 transitions. [2023-08-30 10:08:36,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 134.3) internal successors, (1343), 10 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,585 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,585 INFO L175 Difference]: Start difference. First operand has 98 places, 43 transitions, 346 flow. Second operand 10 states and 1343 transitions. [2023-08-30 10:08:36,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 57 transitions, 534 flow [2023-08-30 10:08:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 429 flow, removed 7 selfloop flow, removed 17 redundant places. [2023-08-30 10:08:36,587 INFO L231 Difference]: Finished difference. Result has 71 places, 38 transitions, 250 flow [2023-08-30 10:08:36,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=250, PETRI_PLACES=71, PETRI_TRANSITIONS=38} [2023-08-30 10:08:36,587 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2023-08-30 10:08:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 38 transitions, 250 flow [2023-08-30 10:08:36,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:36,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:36,587 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 10:08:36,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 10:08:36,588 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 13 more)] === [2023-08-30 10:08:36,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1268690142, now seen corresponding path program 2 times [2023-08-30 10:08:36,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:36,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71730635] [2023-08-30 10:08:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:36,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:36,774 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 10:08:36,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71730635] [2023-08-30 10:08:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71730635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:36,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372961367] [2023-08-30 10:08:36,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 10:08:36,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:36,776 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 10:08:36,778 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 10:08:36,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 10:08:36,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 10:08:36,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 10:08:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:36,876 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:08:36,876 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 10:08:36,934 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 10:08:36,998 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 10:08:37,020 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 10:08:37,033 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 10:08:37,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372961367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:37,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 10:08:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561196467] [2023-08-30 10:08:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 10:08:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 10:08:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-30 10:08:37,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 308 [2023-08-30 10:08:37,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 38 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 130.625) internal successors, (1045), 8 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:37,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:37,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 308 [2023-08-30 10:08:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:37,241 INFO L130 PetriNetUnfolder]: 32/133 cut-off events. [2023-08-30 10:08:37,241 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 10:08:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 133 events. 32/133 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 405 event pairs, 21 based on Foata normal form. 2/135 useless extension candidates. Maximal degree in co-relation 457. Up to 58 conditions per place. [2023-08-30 10:08:37,242 INFO L137 encePairwiseOnDemand]: 300/308 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-30 10:08:37,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 43 transitions, 338 flow [2023-08-30 10:08:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 10:08:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 10:08:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1053 transitions. [2023-08-30 10:08:37,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273538961038961 [2023-08-30 10:08:37,243 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1053 transitions. [2023-08-30 10:08:37,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1053 transitions. [2023-08-30 10:08:37,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:37,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1053 transitions. [2023-08-30 10:08:37,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:37,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:37,246 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:37,246 INFO L175 Difference]: Start difference. First operand has 71 places, 38 transitions, 250 flow. Second operand 8 states and 1053 transitions. [2023-08-30 10:08:37,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 43 transitions, 338 flow [2023-08-30 10:08:37,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 266 flow, removed 9 selfloop flow, removed 15 redundant places. [2023-08-30 10:08:37,247 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-30 10:08:37,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-30 10:08:37,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-30 10:08:37,248 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-30 10:08:37,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.625) internal successors, (1045), 8 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 16 remaining) [2023-08-30 10:08:37,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 16 remaining) [2023-08-30 10:08:37,260 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 16 remaining) [2023-08-30 10:08:37,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 16 remaining) [2023-08-30 10:08:37,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 16 remaining) [2023-08-30 10:08:37,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 10:08:37,466 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,SelfDestructingSolverStorable28 [2023-08-30 10:08:37,467 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:37,467 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 10:08:37,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,482 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2023-08-30 10:08:37,482 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:08:37,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 832 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-30 10:08:37,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:37,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 10:08:37,498 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2023-08-30 10:08:37,498 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 10:08:37,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 31/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 832 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-30 10:08:37,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 11760 [2023-08-30 10:08:40,074 INFO L134 LiptonReduction]: Checked pairs total: 24307 [2023-08-30 10:08:40,074 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 10:08:40,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 10:08:40,077 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:40,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 10:08:40,080 INFO L130 PetriNetUnfolder]: 10/60 cut-off events. [2023-08-30 10:08:40,080 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 10:08:40,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:40,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 10:08:40,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 10:08:40,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash -885856554, now seen corresponding path program 1 times [2023-08-30 10:08:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981348151] [2023-08-30 10:08:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:40,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 10:08:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 10:08:40,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 10:08:40,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 10:08:40,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 10:08:40,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 10:08:40,094 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 10:08:40,094 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 10:08:40,094 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 10:08:40,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 10:08:40,107 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 10:08:40,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,135 INFO L130 PetriNetUnfolder]: 50/423 cut-off events. [2023-08-30 10:08:40,135 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:08:40,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 423 events. 50/423 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1433 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2023-08-30 10:08:40,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 10:08:40,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 10:08:40,165 INFO L130 PetriNetUnfolder]: 50/423 cut-off events. [2023-08-30 10:08:40,166 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 10:08:40,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 423 events. 50/423 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1433 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2023-08-30 10:08:40,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 22800 [2023-08-30 10:08:42,814 INFO L134 LiptonReduction]: Checked pairs total: 57401 [2023-08-30 10:08:42,814 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-30 10:08:42,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 10:08:42,818 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 10:08:42,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 10:08:42,819 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2023-08-30 10:08:42,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 10:08:42,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:42,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 10:08:42,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:08:42,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1431724204, now seen corresponding path program 1 times [2023-08-30 10:08:42,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:42,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894859486] [2023-08-30 10:08:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:42,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:42,850 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 10:08:42,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:42,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894859486] [2023-08-30 10:08:42,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894859486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:42,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:42,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 10:08:42,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330463828] [2023-08-30 10:08:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:42,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:08:42,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:08:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:08:42,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 384 [2023-08-30 10:08:42,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 89 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:42,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:42,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 384 [2023-08-30 10:08:42,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:49,817 INFO L130 PetriNetUnfolder]: 106504/150623 cut-off events. [2023-08-30 10:08:49,817 INFO L131 PetriNetUnfolder]: For 2669/2669 co-relation queries the response was YES. [2023-08-30 10:08:49,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300077 conditions, 150623 events. 106504/150623 cut-off events. For 2669/2669 co-relation queries the response was YES. Maximal size of possible extension queue 3818. Compared 1100366 event pairs, 69316 based on Foata normal form. 11036/116848 useless extension candidates. Maximal degree in co-relation 26589. Up to 147719 conditions per place. [2023-08-30 10:08:50,504 INFO L137 encePairwiseOnDemand]: 359/384 looper letters, 74 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-30 10:08:50,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 350 flow [2023-08-30 10:08:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:08:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:08:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 10:08:50,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2023-08-30 10:08:50,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 10:08:50,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 10:08:50,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:50,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 10:08:50,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:50,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:50,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:50,508 INFO L175 Difference]: Start difference. First operand has 73 places, 89 transitions, 208 flow. Second operand 3 states and 633 transitions. [2023-08-30 10:08:50,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 350 flow [2023-08-30 10:08:50,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:08:50,510 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 184 flow [2023-08-30 10:08:50,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-30 10:08:50,511 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 10:08:50,511 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 184 flow [2023-08-30 10:08:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:50,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:50,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:08:50,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 10:08:50,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:08:50,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1504790252, now seen corresponding path program 1 times [2023-08-30 10:08:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:50,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923178072] [2023-08-30 10:08:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:50,545 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 10:08:50,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923178072] [2023-08-30 10:08:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923178072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:50,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:08:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:08:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726486854] [2023-08-30 10:08:50,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:50,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:50,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 10:08:50,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 384 [2023-08-30 10:08:50,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:50,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:50,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 384 [2023-08-30 10:08:50,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:08:57,375 INFO L130 PetriNetUnfolder]: 101576/142344 cut-off events. [2023-08-30 10:08:57,375 INFO L131 PetriNetUnfolder]: For 8636/8636 co-relation queries the response was YES. [2023-08-30 10:08:57,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297007 conditions, 142344 events. 101576/142344 cut-off events. For 8636/8636 co-relation queries the response was YES. Maximal size of possible extension queue 3796. Compared 1013225 event pairs, 48877 based on Foata normal form. 192/103731 useless extension candidates. Maximal degree in co-relation 296918. Up to 138760 conditions per place. [2023-08-30 10:08:57,924 INFO L137 encePairwiseOnDemand]: 373/384 looper letters, 90 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-08-30 10:08:57,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 475 flow [2023-08-30 10:08:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:08:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:08:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 780 transitions. [2023-08-30 10:08:57,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2023-08-30 10:08:57,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 780 transitions. [2023-08-30 10:08:57,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 780 transitions. [2023-08-30 10:08:57,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:08:57,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 780 transitions. [2023-08-30 10:08:57,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:57,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:57,928 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:57,928 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 184 flow. Second operand 4 states and 780 transitions. [2023-08-30 10:08:57,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 475 flow [2023-08-30 10:08:57,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:08:57,935 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 253 flow [2023-08-30 10:08:57,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-08-30 10:08:57,935 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-08-30 10:08:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 253 flow [2023-08-30 10:08:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:57,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:08:57,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:08:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 10:08:57,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:08:57,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:08:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 294153188, now seen corresponding path program 1 times [2023-08-30 10:08:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:08:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719737686] [2023-08-30 10:08:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:08:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:57,955 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 10:08:57,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:08:57,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719737686] [2023-08-30 10:08:57,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719737686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:08:57,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699824453] [2023-08-30 10:08:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:08:57,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:08:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:08:57,957 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 10:08:57,959 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 10:08:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:08:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 10:08:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:08:58,074 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 10:08:58,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:08:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699824453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:08:58,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:08:58,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 10:08:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50318409] [2023-08-30 10:08:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:08:58,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 10:08:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:08:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 10:08:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 10:08:58,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 384 [2023-08-30 10:08:58,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:08:58,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:08:58,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 384 [2023-08-30 10:08:58,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:09:04,853 INFO L130 PetriNetUnfolder]: 93417/131742 cut-off events. [2023-08-30 10:09:04,853 INFO L131 PetriNetUnfolder]: For 33020/33100 co-relation queries the response was YES. [2023-08-30 10:09:05,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308895 conditions, 131742 events. 93417/131742 cut-off events. For 33020/33100 co-relation queries the response was YES. Maximal size of possible extension queue 3410. Compared 940224 event pairs, 63460 based on Foata normal form. 0/105883 useless extension candidates. Maximal degree in co-relation 188861. Up to 129917 conditions per place. [2023-08-30 10:09:05,380 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-30 10:09:05,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 88 transitions, 436 flow [2023-08-30 10:09:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 10:09:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 10:09:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 778 transitions. [2023-08-30 10:09:05,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065104166666666 [2023-08-30 10:09:05,381 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 778 transitions. [2023-08-30 10:09:05,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 778 transitions. [2023-08-30 10:09:05,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:09:05,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 778 transitions. [2023-08-30 10:09:05,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:05,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:05,383 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:05,383 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 253 flow. Second operand 4 states and 778 transitions. [2023-08-30 10:09:05,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 88 transitions, 436 flow [2023-08-30 10:09:05,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 10:09:05,424 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 253 flow [2023-08-30 10:09:05,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-30 10:09:05,425 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2023-08-30 10:09:05,425 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 253 flow [2023-08-30 10:09:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:05,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:09:05,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 10:09:05,430 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 10:09:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:09:05,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:09:05,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:09:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 294153229, now seen corresponding path program 1 times [2023-08-30 10:09:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:09:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225368426] [2023-08-30 10:09:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:09:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:05,641 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 10:09:05,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:09:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225368426] [2023-08-30 10:09:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225368426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:09:05,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:09:05,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:09:05,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332519568] [2023-08-30 10:09:05,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:09:05,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:09:05,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:09:05,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:09:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:09:05,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 384 [2023-08-30 10:09:05,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:05,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:09:05,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 384 [2023-08-30 10:09:05,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:09:11,995 INFO L130 PetriNetUnfolder]: 85258/119673 cut-off events. [2023-08-30 10:09:11,995 INFO L131 PetriNetUnfolder]: For 27460/27476 co-relation queries the response was YES. [2023-08-30 10:09:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279877 conditions, 119673 events. 85258/119673 cut-off events. For 27460/27476 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 865408 event pairs, 14047 based on Foata normal form. 0/98665 useless extension candidates. Maximal degree in co-relation 279389. Up to 99220 conditions per place. [2023-08-30 10:09:12,546 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 107 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2023-08-30 10:09:12,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 598 flow [2023-08-30 10:09:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:09:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:09:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-30 10:09:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434027777777778 [2023-08-30 10:09:12,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-30 10:09:12,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-30 10:09:12,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:09:12,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-30 10:09:12,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:12,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:12,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:12,548 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 253 flow. Second operand 3 states and 626 transitions. [2023-08-30 10:09:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 598 flow [2023-08-30 10:09:12,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 595 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:09:12,575 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 262 flow [2023-08-30 10:09:12,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-30 10:09:12,575 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2023-08-30 10:09:12,575 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 262 flow [2023-08-30 10:09:12,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:12,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:09:12,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:09:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 10:09:12,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:09:12,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:09:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 52262741, now seen corresponding path program 1 times [2023-08-30 10:09:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:09:12,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360934976] [2023-08-30 10:09:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:09:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:12,632 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 10:09:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:09:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360934976] [2023-08-30 10:09:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360934976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:09:12,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:09:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 10:09:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826754691] [2023-08-30 10:09:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:09:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:09:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:09:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:09:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 10:09:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-08-30 10:09:12,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 165.5) internal successors, (993), 6 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:12,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:09:12,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-08-30 10:09:12,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:09:22,431 INFO L130 PetriNetUnfolder]: 126282/182967 cut-off events. [2023-08-30 10:09:22,431 INFO L131 PetriNetUnfolder]: For 76980/77077 co-relation queries the response was YES. [2023-08-30 10:09:22,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433940 conditions, 182967 events. 126282/182967 cut-off events. For 76980/77077 co-relation queries the response was YES. Maximal size of possible extension queue 4865. Compared 1424598 event pairs, 29462 based on Foata normal form. 97/156334 useless extension candidates. Maximal degree in co-relation 433837. Up to 107855 conditions per place. [2023-08-30 10:09:23,264 INFO L137 encePairwiseOnDemand]: 361/384 looper letters, 220 selfloop transitions, 40 changer transitions 0/268 dead transitions. [2023-08-30 10:09:23,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 268 transitions, 1397 flow [2023-08-30 10:09:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 10:09:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 10:09:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1740 transitions. [2023-08-30 10:09:23,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2023-08-30 10:09:23,266 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1740 transitions. [2023-08-30 10:09:23,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1740 transitions. [2023-08-30 10:09:23,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:09:23,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1740 transitions. [2023-08-30 10:09:23,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.33333333333334) internal successors, (1740), 9 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:23,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:23,270 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:23,270 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 262 flow. Second operand 9 states and 1740 transitions. [2023-08-30 10:09:23,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 268 transitions, 1397 flow [2023-08-30 10:09:23,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 268 transitions, 1379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 10:09:23,303 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 598 flow [2023-08-30 10:09:23,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2023-08-30 10:09:23,304 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 22 predicate places. [2023-08-30 10:09:23,304 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 598 flow [2023-08-30 10:09:23,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.5) internal successors, (993), 6 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:23,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:09:23,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:09:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 10:09:23,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:09:23,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:09:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash 52262753, now seen corresponding path program 1 times [2023-08-30 10:09:23,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:09:23,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656369979] [2023-08-30 10:09:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:23,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:09:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:23,331 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 10:09:23,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:09:23,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656369979] [2023-08-30 10:09:23,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656369979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:09:23,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 10:09:23,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 10:09:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787545953] [2023-08-30 10:09:23,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:09:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 10:09:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:09:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 10:09:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 10:09:23,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 384 [2023-08-30 10:09:23,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:23,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:09:23,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 384 [2023-08-30 10:09:23,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:09:37,505 INFO L130 PetriNetUnfolder]: 149300/221956 cut-off events. [2023-08-30 10:09:37,506 INFO L131 PetriNetUnfolder]: For 316692/316910 co-relation queries the response was YES. [2023-08-30 10:09:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666460 conditions, 221956 events. 149300/221956 cut-off events. For 316692/316910 co-relation queries the response was YES. Maximal size of possible extension queue 5754. Compared 1849254 event pairs, 52991 based on Foata normal form. 10652/229541 useless extension candidates. Maximal degree in co-relation 666350. Up to 132364 conditions per place. [2023-08-30 10:09:38,756 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 137 selfloop transitions, 38 changer transitions 0/183 dead transitions. [2023-08-30 10:09:38,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 183 transitions, 1344 flow [2023-08-30 10:09:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 10:09:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 10:09:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 10:09:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460069444444444 [2023-08-30 10:09:38,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 10:09:38,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 10:09:38,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:09:38,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 10:09:38,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 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 10:09:38,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:38,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:38,759 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 598 flow. Second operand 3 states and 629 transitions. [2023-08-30 10:09:38,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 183 transitions, 1344 flow [2023-08-30 10:09:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 183 transitions, 1317 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 10:09:39,391 INFO L231 Difference]: Finished difference. Result has 97 places, 134 transitions, 977 flow [2023-08-30 10:09:39,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=977, PETRI_PLACES=97, PETRI_TRANSITIONS=134} [2023-08-30 10:09:39,391 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 24 predicate places. [2023-08-30 10:09:39,391 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 134 transitions, 977 flow [2023-08-30 10:09:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:39,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:09:39,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:09:39,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 10:09:39,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:09:39,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:09:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash -978972919, now seen corresponding path program 1 times [2023-08-30 10:09:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:09:39,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141970903] [2023-08-30 10:09:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:09:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:39,461 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 10:09:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:09:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141970903] [2023-08-30 10:09:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141970903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:09:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650836632] [2023-08-30 10:09:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:39,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:09:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:09:39,463 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 10:09:39,464 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 10:09:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 10:09:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:09:39,562 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:09:39,563 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 10:09:39,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 10:09:39,602 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 10:09:39,611 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 10:09:39,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:09:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650836632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:09:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:09:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 10:09:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791022887] [2023-08-30 10:09:39,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:09:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 10:09:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:09:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 10:09:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 10:09:39,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 384 [2023-08-30 10:09:39,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 134 transitions, 977 flow. Second operand has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:39,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:09:39,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 384 [2023-08-30 10:09:39,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:09:54,548 INFO L130 PetriNetUnfolder]: 145614/216174 cut-off events. [2023-08-30 10:09:54,548 INFO L131 PetriNetUnfolder]: For 508211/508576 co-relation queries the response was YES. [2023-08-30 10:09:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721626 conditions, 216174 events. 145614/216174 cut-off events. For 508211/508576 co-relation queries the response was YES. Maximal size of possible extension queue 5390. Compared 1790256 event pairs, 68716 based on Foata normal form. 2184/215415 useless extension candidates. Maximal degree in co-relation 721507. Up to 133933 conditions per place. [2023-08-30 10:09:55,948 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 305 selfloop transitions, 40 changer transitions 0/353 dead transitions. [2023-08-30 10:09:55,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 353 transitions, 3195 flow [2023-08-30 10:09:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 10:09:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 10:09:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2023-08-30 10:09:55,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2023-08-30 10:09:55,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2023-08-30 10:09:55,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2023-08-30 10:09:55,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:09:55,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2023-08-30 10:09:55,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:55,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:55,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:55,953 INFO L175 Difference]: Start difference. First operand has 97 places, 134 transitions, 977 flow. Second operand 5 states and 1035 transitions. [2023-08-30 10:09:55,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 353 transitions, 3195 flow [2023-08-30 10:09:57,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 353 transitions, 3013 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 10:09:57,351 INFO L231 Difference]: Finished difference. Result has 102 places, 167 transitions, 1393 flow [2023-08-30 10:09:57,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1393, PETRI_PLACES=102, PETRI_TRANSITIONS=167} [2023-08-30 10:09:57,351 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 29 predicate places. [2023-08-30 10:09:57,351 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 167 transitions, 1393 flow [2023-08-30 10:09:57,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:57,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:09:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:09:57,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 10:09:57,552 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 10:09:57,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:09:57,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:09:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -978972931, now seen corresponding path program 1 times [2023-08-30 10:09:57,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:09:57,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990016360] [2023-08-30 10:09:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:09:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:57,624 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 10:09:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:09:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990016360] [2023-08-30 10:09:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990016360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:09:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708946127] [2023-08-30 10:09:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:09:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:09:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:09:57,629 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 10:09:57,631 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 10:09:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:09:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 10:09:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:09:57,727 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:09:57,727 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 10:09:57,742 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 10:09:57,801 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 10:09:57,821 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 10:09:57,834 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 10:09:57,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 10:09:57,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708946127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 10:09:57,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 10:09:57,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-30 10:09:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367183326] [2023-08-30 10:09:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 10:09:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 10:09:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:09:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 10:09:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 10:09:57,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-08-30 10:09:57,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 167 transitions, 1393 flow. Second operand has 6 states, 6 states have (on average 166.83333333333334) internal successors, (1001), 6 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:09:57,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:09:57,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-08-30 10:09:57,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 10:10:13,347 INFO L130 PetriNetUnfolder]: 142470/210930 cut-off events. [2023-08-30 10:10:13,348 INFO L131 PetriNetUnfolder]: For 580009/580257 co-relation queries the response was YES. [2023-08-30 10:10:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733661 conditions, 210930 events. 142470/210930 cut-off events. For 580009/580257 co-relation queries the response was YES. Maximal size of possible extension queue 5232. Compared 1713414 event pairs, 55530 based on Foata normal form. 705/208795 useless extension candidates. Maximal degree in co-relation 733540. Up to 198572 conditions per place. [2023-08-30 10:10:14,977 INFO L137 encePairwiseOnDemand]: 374/384 looper letters, 225 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2023-08-30 10:10:14,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 269 transitions, 2559 flow [2023-08-30 10:10:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 10:10:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 10:10:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1130 transitions. [2023-08-30 10:10:14,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904513888888889 [2023-08-30 10:10:14,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1130 transitions. [2023-08-30 10:10:14,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1130 transitions. [2023-08-30 10:10:14,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 10:10:14,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1130 transitions. [2023-08-30 10:10:14,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.33333333333334) internal successors, (1130), 6 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:10:14,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:10:14,981 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:10:14,981 INFO L175 Difference]: Start difference. First operand has 102 places, 167 transitions, 1393 flow. Second operand 6 states and 1130 transitions. [2023-08-30 10:10:14,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 269 transitions, 2559 flow [2023-08-30 10:10:28,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 269 transitions, 2551 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 10:10:28,727 INFO L231 Difference]: Finished difference. Result has 109 places, 192 transitions, 1781 flow [2023-08-30 10:10:28,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1781, PETRI_PLACES=109, PETRI_TRANSITIONS=192} [2023-08-30 10:10:28,728 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 36 predicate places. [2023-08-30 10:10:28,728 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 192 transitions, 1781 flow [2023-08-30 10:10:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.83333333333334) internal successors, (1001), 6 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:10:28,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 10:10:28,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 10:10:28,732 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 10:10:28,928 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 10:10:28,928 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 10:10:28,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 10:10:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 80595894, now seen corresponding path program 1 times [2023-08-30 10:10:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 10:10:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50353054] [2023-08-30 10:10:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:10:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 10:10:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:10:28,995 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 10:10:28,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 10:10:28,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50353054] [2023-08-30 10:10:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50353054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 10:10:28,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371947945] [2023-08-30 10:10:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 10:10:28,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 10:10:28,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 10:10:28,997 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 10:10:28,999 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 10:10:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 10:10:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 10:10:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 10:10:29,099 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 10:10:29,100 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 10:10:29,116 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 10:10:29,135 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 10:10:29,175 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 10:10:29,197 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 10:10:29,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 10:10:29,233 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1061 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1061) c_~g1~0.base) c_~g1~0.offset)))) is different from false [2023-08-30 10:10:29,241 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 10:10:29,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371947945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 10:10:29,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 10:10:29,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 10:10:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844200592] [2023-08-30 10:10:29,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 10:10:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 10:10:29,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 10:10:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 10:10:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=112, Unknown=1, NotChecked=22, Total=182 [2023-08-30 10:10:29,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 384 [2023-08-30 10:10:29,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 192 transitions, 1781 flow. Second operand has 14 states, 14 states have (on average 142.78571428571428) internal successors, (1999), 14 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 10:10:29,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 10:10:29,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 384 [2023-08-30 10:10:29,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand