./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:06:05,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:06:05,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:06:05,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:06:05,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:06:05,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:06:05,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:06:05,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:06:05,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:06:05,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:06:05,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:06:05,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:06:05,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:06:05,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:06:05,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:06:05,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:06:05,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:06:05,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:06:05,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:06:05,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:06:05,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:06:05,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:06:05,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:06:05,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:06:05,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:06:05,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:06:05,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:06:05,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:06:05,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:06:05,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:06:05,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:06:05,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:06:05,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:06:05,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:06:05,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:06:05,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:06:05,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:06:05,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:06:05,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:06:05,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:06:05,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:06:05,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:06:06,011 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:06:06,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:06:06,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:06:06,013 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:06:06,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:06:06,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:06:06,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:06:06,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:06:06,015 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:06:06,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:06:06,016 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:06:06,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:06:06,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:06:06,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:06:06,017 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:06:06,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:06:06,018 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:06:06,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:06:06,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:06:06,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:06:06,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:06:06,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:06:06,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:06:06,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:06:06,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:06:06,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:06:06,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:06:06,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:06:06,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:06:06,020 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:06:06,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:06:06,021 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:06:06,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:06:06,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:06:06,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:06:06,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:06:06,354 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:06:06,354 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:06:06,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-09-01 08:06:07,580 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:06:07,777 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:06:07,778 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-09-01 08:06:07,787 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b47f213/451e51d2358a4fe88af65d8427dbb436/FLAGafa987c45 [2023-09-01 08:06:07,816 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b47f213/451e51d2358a4fe88af65d8427dbb436 [2023-09-01 08:06:07,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:06:07,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:06:07,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:07,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:06:07,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:06:07,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:07" (1/1) ... [2023-09-01 08:06:07,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447b63d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:07, skipping insertion in model container [2023-09-01 08:06:07,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:07" (1/1) ... [2023-09-01 08:06:07,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:06:07,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:06:08,046 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-09-01 08:06:08,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:08,059 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:06:08,088 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-09-01 08:06:08,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:08,096 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:08,096 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:08,102 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:06:08,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08 WrapperNode [2023-09-01 08:06:08,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:08,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:08,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:06:08,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:06:08,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,148 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-09-01 08:06:08,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:08,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:06:08,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:06:08,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:06:08,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:06:08,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:06:08,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:06:08,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:06:08,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:06:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:08,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 08:06:08,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 08:06:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:06:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:06:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:06:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:06:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:06:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:06:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:06:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:06:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:06:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:06:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:06:08,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:06:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:06:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:06:08,245 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:06:08,322 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:06:08,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:06:08,505 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:06:08,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:06:08,600 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:06:08,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:08 BoogieIcfgContainer [2023-09-01 08:06:08,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:06:08,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:06:08,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:06:08,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:06:08,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:06:07" (1/3) ... [2023-09-01 08:06:08,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a684bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:08, skipping insertion in model container [2023-09-01 08:06:08,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08" (2/3) ... [2023-09-01 08:06:08,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a684bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:08, skipping insertion in model container [2023-09-01 08:06:08,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:08" (3/3) ... [2023-09-01 08:06:08,622 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-09-01 08:06:08,630 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:06:08,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:06:08,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:06:08,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:06:08,719 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:06:08,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 212 flow [2023-09-01 08:06:08,806 INFO L130 PetriNetUnfolder]: 6/96 cut-off events. [2023-09-01 08:06:08,809 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:06:08,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-09-01 08:06:08,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 212 flow [2023-09-01 08:06:08,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 81 transitions, 174 flow [2023-09-01 08:06:08,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:06:08,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 81 transitions, 174 flow [2023-09-01 08:06:08,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 81 transitions, 174 flow [2023-09-01 08:06:08,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 81 transitions, 174 flow [2023-09-01 08:06:08,889 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-09-01 08:06:08,889 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:06:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 5/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-09-01 08:06:08,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-09-01 08:06:11,458 INFO L134 LiptonReduction]: Checked pairs total: 1236 [2023-09-01 08:06:11,458 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-09-01 08:06:11,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:06:11,477 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;@1d0428f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:06:11,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-09-01 08:06:11,480 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-09-01 08:06:11,480 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:06:11,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:11,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:11,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:11,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 12203368, now seen corresponding path program 1 times [2023-09-01 08:06:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:11,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810135258] [2023-09-01 08:06:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:11,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:11,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810135258] [2023-09-01 08:06:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810135258] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:11,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710320699] [2023-09-01 08:06:11,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:11,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:11,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:11,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:11,878 INFO L130 PetriNetUnfolder]: 215/337 cut-off events. [2023-09-01 08:06:11,878 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 08:06:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 337 events. 215/337 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 1250 event pairs, 41 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 595. Up to 306 conditions per place. [2023-09-01 08:06:11,882 INFO L137 encePairwiseOnDemand]: 162/173 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-09-01 08:06:11,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 161 flow [2023-09-01 08:06:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-09-01 08:06:11,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549132947976878 [2023-09-01 08:06:11,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-09-01 08:06:11,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-09-01 08:06:11,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:11,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-09-01 08:06:11,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:11,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:11,986 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 288 transitions. [2023-09-01 08:06:11,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 161 flow [2023-09-01 08:06:11,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:06:11,991 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 86 flow [2023-09-01 08:06:11,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-09-01 08:06:11,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-09-01 08:06:11,996 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 86 flow [2023-09-01 08:06:11,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:11,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:11,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:06:11,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:11,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 12203416, now seen corresponding path program 1 times [2023-09-01 08:06:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398345527] [2023-09-01 08:06:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:12,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398345527] [2023-09-01 08:06:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398345527] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:12,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:12,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:12,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234245787] [2023-09-01 08:06:12,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:12,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:12,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:12,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:12,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:12,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:12,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:12,152 INFO L130 PetriNetUnfolder]: 198/324 cut-off events. [2023-09-01 08:06:12,152 INFO L131 PetriNetUnfolder]: For 25/53 co-relation queries the response was YES. [2023-09-01 08:06:12,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 324 events. 198/324 cut-off events. For 25/53 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1347 event pairs, 105 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 730. Up to 290 conditions per place. [2023-09-01 08:06:12,160 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-09-01 08:06:12,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 165 flow [2023-09-01 08:06:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-09-01 08:06:12,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-09-01 08:06:12,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-09-01 08:06:12,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-09-01 08:06:12,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:12,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-09-01 08:06:12,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:12,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:12,173 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 86 flow. Second operand 3 states and 278 transitions. [2023-09-01 08:06:12,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 165 flow [2023-09-01 08:06:12,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:12,175 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 78 flow [2023-09-01 08:06:12,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-09-01 08:06:12,176 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-09-01 08:06:12,176 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 78 flow [2023-09-01 08:06:12,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:12,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:12,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:06:12,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:12,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash 378306317, now seen corresponding path program 1 times [2023-09-01 08:06:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:12,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470140430] [2023-09-01 08:06:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470140430] [2023-09-01 08:06:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470140430] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724907143] [2023-09-01 08:06:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:12,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:12,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:06:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:12,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724907143] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:12,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:06:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184346752] [2023-09-01 08:06:12,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:12,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:12,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:12,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:12,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:12,698 INFO L130 PetriNetUnfolder]: 636/975 cut-off events. [2023-09-01 08:06:12,698 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-09-01 08:06:12,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 975 events. 636/975 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4702 event pairs, 80 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 922. Up to 588 conditions per place. [2023-09-01 08:06:12,704 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 86 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-09-01 08:06:12,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 96 transitions, 481 flow [2023-09-01 08:06:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:06:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:06:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 665 transitions. [2023-09-01 08:06:12,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491329479768786 [2023-09-01 08:06:12,707 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 665 transitions. [2023-09-01 08:06:12,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 665 transitions. [2023-09-01 08:06:12,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:12,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 665 transitions. [2023-09-01 08:06:12,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,713 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,713 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 78 flow. Second operand 7 states and 665 transitions. [2023-09-01 08:06:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 96 transitions, 481 flow [2023-09-01 08:06:12,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 96 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:06:12,715 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 133 flow [2023-09-01 08:06:12,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 08:06:12,716 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-09-01 08:06:12,717 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 133 flow [2023-09-01 08:06:12,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:12,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:12,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 08:06:12,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:12,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:12,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:12,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:12,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1157405639, now seen corresponding path program 1 times [2023-09-01 08:06:12,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:12,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637531469] [2023-09-01 08:06:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:13,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637531469] [2023-09-01 08:06:13,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637531469] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:13,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484132300] [2023-09-01 08:06:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:13,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:13,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:06:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:06:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:06:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484132300] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:06:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-09-01 08:06:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791908303] [2023-09-01 08:06:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:06:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:06:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:06:13,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:13,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:13,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:13,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,256 INFO L130 PetriNetUnfolder]: 577/902 cut-off events. [2023-09-01 08:06:13,257 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-09-01 08:06:13,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 902 events. 577/902 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4444 event pairs, 33 based on Foata normal form. 28/616 useless extension candidates. Maximal degree in co-relation 1173. Up to 665 conditions per place. [2023-09-01 08:06:13,263 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 52 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-09-01 08:06:13,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 295 flow [2023-09-01 08:06:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:06:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:06:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-09-01 08:06:13,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317919075144508 [2023-09-01 08:06:13,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-09-01 08:06:13,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-09-01 08:06:13,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-09-01 08:06:13,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,270 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 133 flow. Second operand 5 states and 460 transitions. [2023-09-01 08:06:13,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 295 flow [2023-09-01 08:06:13,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:13,276 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 110 flow [2023-09-01 08:06:13,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-09-01 08:06:13,277 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-09-01 08:06:13,277 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 110 flow [2023-09-01 08:06:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:13,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:13,500 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,SelfDestructingSolverStorable3 [2023-09-01 08:06:13,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:13,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash 378306269, now seen corresponding path program 1 times [2023-09-01 08:06:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:13,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230019049] [2023-09-01 08:06:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230019049] [2023-09-01 08:06:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230019049] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:13,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:13,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294528769] [2023-09-01 08:06:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:13,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:13,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:13,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:13,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:13,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:13,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,622 INFO L130 PetriNetUnfolder]: 446/711 cut-off events. [2023-09-01 08:06:13,622 INFO L131 PetriNetUnfolder]: For 244/252 co-relation queries the response was YES. [2023-09-01 08:06:13,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 711 events. 446/711 cut-off events. For 244/252 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3577 event pairs, 270 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 933. Up to 706 conditions per place. [2023-09-01 08:06:13,627 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-09-01 08:06:13,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 152 flow [2023-09-01 08:06:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-09-01 08:06:13,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51252408477842 [2023-09-01 08:06:13,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-09-01 08:06:13,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-09-01 08:06:13,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-09-01 08:06:13,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:13,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:13,632 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 110 flow. Second operand 3 states and 266 transitions. [2023-09-01 08:06:13,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 152 flow [2023-09-01 08:06:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:06:13,634 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 103 flow [2023-09-01 08:06:13,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-09-01 08:06:13,635 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-09-01 08:06:13,635 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 103 flow [2023-09-01 08:06:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:06:13,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:13,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 378306270, now seen corresponding path program 1 times [2023-09-01 08:06:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:13,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079446616] [2023-09-01 08:06:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:13,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079446616] [2023-09-01 08:06:13,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079446616] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:13,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802175276] [2023-09-01 08:06:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:13,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:13,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:06:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802175276] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:13,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:06:13,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790117161] [2023-09-01 08:06:13,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:13,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:13,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:13,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:13,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:13,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,956 INFO L130 PetriNetUnfolder]: 593/1082 cut-off events. [2023-09-01 08:06:13,956 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-09-01 08:06:13,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 1082 events. 593/1082 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5921 event pairs, 89 based on Foata normal form. 136/995 useless extension candidates. Maximal degree in co-relation 3019. Up to 487 conditions per place. [2023-09-01 08:06:13,963 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 61 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-09-01 08:06:13,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 88 transitions, 513 flow [2023-09-01 08:06:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:06:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:06:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 579 transitions. [2023-09-01 08:06:13,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578034682080925 [2023-09-01 08:06:13,966 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 579 transitions. [2023-09-01 08:06:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 579 transitions. [2023-09-01 08:06:13,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 579 transitions. [2023-09-01 08:06:13,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.5) internal successors, (579), 6 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,970 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,970 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 103 flow. Second operand 6 states and 579 transitions. [2023-09-01 08:06:13,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 88 transitions, 513 flow [2023-09-01 08:06:13,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:13,973 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 370 flow [2023-09-01 08:06:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-09-01 08:06:13,974 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-09-01 08:06:13,974 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 370 flow [2023-09-01 08:06:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:13,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:14,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:14,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1225627852, now seen corresponding path program 1 times [2023-09-01 08:06:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650353642] [2023-09-01 08:06:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650353642] [2023-09-01 08:06:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650353642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:14,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:14,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97834085] [2023-09-01 08:06:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:14,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:14,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:14,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:14,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:14,364 INFO L130 PetriNetUnfolder]: 587/1125 cut-off events. [2023-09-01 08:06:14,364 INFO L131 PetriNetUnfolder]: For 1697/1697 co-relation queries the response was YES. [2023-09-01 08:06:14,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 1125 events. 587/1125 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6207 event pairs, 343 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 4151. Up to 926 conditions per place. [2023-09-01 08:06:14,373 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-09-01 08:06:14,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 629 flow [2023-09-01 08:06:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-09-01 08:06:14,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-09-01 08:06:14,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-09-01 08:06:14,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-09-01 08:06:14,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:14,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-09-01 08:06:14,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:14,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:14,398 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 370 flow. Second operand 3 states and 278 transitions. [2023-09-01 08:06:14,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 629 flow [2023-09-01 08:06:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 571 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-09-01 08:06:14,405 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 380 flow [2023-09-01 08:06:14,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-09-01 08:06:14,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 08:06:14,406 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 380 flow [2023-09-01 08:06:14,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:14,407 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:06:14,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:06:14,407 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:14,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 129723049, now seen corresponding path program 2 times [2023-09-01 08:06:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:14,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045094449] [2023-09-01 08:06:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045094449] [2023-09-01 08:06:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045094449] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537042135] [2023-09-01 08:06:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:14,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:14,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:14,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:14,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:06:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:06:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:06:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:14,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537042135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:14,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:06:14,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870070868] [2023-09-01 08:06:14,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 08:06:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 08:06:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:06:14,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:14,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 380 flow. Second operand has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:14,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:14,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:15,091 INFO L130 PetriNetUnfolder]: 1355/2567 cut-off events. [2023-09-01 08:06:15,093 INFO L131 PetriNetUnfolder]: For 6674/6748 co-relation queries the response was YES. [2023-09-01 08:06:15,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9542 conditions, 2567 events. 1355/2567 cut-off events. For 6674/6748 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16916 event pairs, 169 based on Foata normal form. 344/2387 useless extension candidates. Maximal degree in co-relation 9524. Up to 845 conditions per place. [2023-09-01 08:06:15,110 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 123 selfloop transitions, 97 changer transitions 0/222 dead transitions. [2023-09-01 08:06:15,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 222 transitions, 1767 flow [2023-09-01 08:06:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:06:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:06:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1173 transitions. [2023-09-01 08:06:15,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565028901734104 [2023-09-01 08:06:15,115 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1173 transitions. [2023-09-01 08:06:15,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1173 transitions. [2023-09-01 08:06:15,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:15,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1173 transitions. [2023-09-01 08:06:15,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 97.75) internal successors, (1173), 12 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,122 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,122 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 380 flow. Second operand 12 states and 1173 transitions. [2023-09-01 08:06:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 222 transitions, 1767 flow [2023-09-01 08:06:15,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 222 transitions, 1754 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:15,133 INFO L231 Difference]: Finished difference. Result has 65 places, 122 transitions, 1529 flow [2023-09-01 08:06:15,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1529, PETRI_PLACES=65, PETRI_TRANSITIONS=122} [2023-09-01 08:06:15,137 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-09-01 08:06:15,137 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 122 transitions, 1529 flow [2023-09-01 08:06:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:15,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:06:15,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:15,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:15,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 129723096, now seen corresponding path program 2 times [2023-09-01 08:06:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:15,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001325833] [2023-09-01 08:06:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:15,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001325833] [2023-09-01 08:06:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001325833] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745157254] [2023-09-01 08:06:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:15,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:15,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:15,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:06:15,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:06:15,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:15,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:06:15,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:06:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745157254] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:15,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:06:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:06:15,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986364810] [2023-09-01 08:06:15,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:15,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:15,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:06:15,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:15,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 122 transitions, 1529 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:15,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:15,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:15,819 INFO L130 PetriNetUnfolder]: 1085/2106 cut-off events. [2023-09-01 08:06:15,819 INFO L131 PetriNetUnfolder]: For 7650/7709 co-relation queries the response was YES. [2023-09-01 08:06:15,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2106 events. 1085/2106 cut-off events. For 7650/7709 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13832 event pairs, 731 based on Foata normal form. 123/1899 useless extension candidates. Maximal degree in co-relation 9284. Up to 2102 conditions per place. [2023-09-01 08:06:15,838 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 100 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-09-01 08:06:15,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 1509 flow [2023-09-01 08:06:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-09-01 08:06:15,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048169556840078 [2023-09-01 08:06:15,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-09-01 08:06:15,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-09-01 08:06:15,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:15,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-09-01 08:06:15,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:15,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:15,844 INFO L175 Difference]: Start difference. First operand has 65 places, 122 transitions, 1529 flow. Second operand 3 states and 262 transitions. [2023-09-01 08:06:15,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 1509 flow [2023-09-01 08:06:15,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 1196 flow, removed 145 selfloop flow, removed 3 redundant places. [2023-09-01 08:06:15,875 INFO L231 Difference]: Finished difference. Result has 63 places, 103 transitions, 996 flow [2023-09-01 08:06:15,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=996, PETRI_PLACES=63, PETRI_TRANSITIONS=103} [2023-09-01 08:06:15,876 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-09-01 08:06:15,876 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 103 transitions, 996 flow [2023-09-01 08:06:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:15,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:15,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:15,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:16,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:16,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569159, now seen corresponding path program 1 times [2023-09-01 08:06:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:16,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078213212] [2023-09-01 08:06:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:16,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078213212] [2023-09-01 08:06:16,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078213212] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887152133] [2023-09-01 08:06:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:16,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:16,139 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:16,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:06:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:16,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887152133] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:16,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:16,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:06:16,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098594198] [2023-09-01 08:06:16,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:16,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:16,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:16,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:16,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 103 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:16,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:16,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:16,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:16,735 INFO L130 PetriNetUnfolder]: 1991/3626 cut-off events. [2023-09-01 08:06:16,735 INFO L131 PetriNetUnfolder]: For 9208/9208 co-relation queries the response was YES. [2023-09-01 08:06:16,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13802 conditions, 3626 events. 1991/3626 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22957 event pairs, 486 based on Foata normal form. 0/3079 useless extension candidates. Maximal degree in co-relation 13774. Up to 1137 conditions per place. [2023-09-01 08:06:16,766 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 196 selfloop transitions, 107 changer transitions 0/304 dead transitions. [2023-09-01 08:06:16,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 304 transitions, 3425 flow [2023-09-01 08:06:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:06:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:06:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 646 transitions. [2023-09-01 08:06:16,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334434351775392 [2023-09-01 08:06:16,770 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 646 transitions. [2023-09-01 08:06:16,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 646 transitions. [2023-09-01 08:06:16,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:16,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 646 transitions. [2023-09-01 08:06:16,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:16,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:16,775 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:16,775 INFO L175 Difference]: Start difference. First operand has 63 places, 103 transitions, 996 flow. Second operand 7 states and 646 transitions. [2023-09-01 08:06:16,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 304 transitions, 3425 flow [2023-09-01 08:06:16,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 304 transitions, 3404 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:16,837 INFO L231 Difference]: Finished difference. Result has 71 places, 185 transitions, 2244 flow [2023-09-01 08:06:16,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=71, PETRI_TRANSITIONS=185} [2023-09-01 08:06:16,838 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-09-01 08:06:16,838 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 185 transitions, 2244 flow [2023-09-01 08:06:16,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:16,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:16,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:16,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:17,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:17,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:17,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash 74678889, now seen corresponding path program 1 times [2023-09-01 08:06:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:17,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576794121] [2023-09-01 08:06:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:17,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:06:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:17,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576794121] [2023-09-01 08:06:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576794121] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:17,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839668425] [2023-09-01 08:06:17,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:17,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:17,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 185 transitions, 2244 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:17,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:17,524 INFO L130 PetriNetUnfolder]: 1570/3047 cut-off events. [2023-09-01 08:06:17,524 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2023-09-01 08:06:17,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 3047 events. 1570/3047 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19970 event pairs, 428 based on Foata normal form. 172/3138 useless extension candidates. Maximal degree in co-relation 11910. Up to 2861 conditions per place. [2023-09-01 08:06:17,542 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 144 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2023-09-01 08:06:17,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 146 transitions, 1966 flow [2023-09-01 08:06:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-09-01 08:06:17,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163776493256262 [2023-09-01 08:06:17,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-09-01 08:06:17,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-09-01 08:06:17,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:17,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-09-01 08:06:17,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:17,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:17,546 INFO L175 Difference]: Start difference. First operand has 71 places, 185 transitions, 2244 flow. Second operand 3 states and 268 transitions. [2023-09-01 08:06:17,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 146 transitions, 1966 flow [2023-09-01 08:06:17,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 146 transitions, 1873 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:17,579 INFO L231 Difference]: Finished difference. Result has 70 places, 130 transitions, 1454 flow [2023-09-01 08:06:17,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1454, PETRI_PLACES=70, PETRI_TRANSITIONS=130} [2023-09-01 08:06:17,580 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-09-01 08:06:17,580 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 130 transitions, 1454 flow [2023-09-01 08:06:17,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:17,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 08:06:17,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:17,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -310441128, now seen corresponding path program 1 times [2023-09-01 08:06:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423835213] [2023-09-01 08:06:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423835213] [2023-09-01 08:06:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423835213] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:17,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729273651] [2023-09-01 08:06:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-09-01 08:06:17,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 130 transitions, 1454 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:17,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-09-01 08:06:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:18,012 INFO L130 PetriNetUnfolder]: 1479/2812 cut-off events. [2023-09-01 08:06:18,013 INFO L131 PetriNetUnfolder]: For 13231/13349 co-relation queries the response was YES. [2023-09-01 08:06:18,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 2812 events. 1479/2812 cut-off events. For 13231/13349 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18333 event pairs, 1029 based on Foata normal form. 118/2922 useless extension candidates. Maximal degree in co-relation 10935. Up to 2808 conditions per place. [2023-09-01 08:06:18,029 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 126 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-09-01 08:06:18,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 129 transitions, 1706 flow [2023-09-01 08:06:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-09-01 08:06:18,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940269749518306 [2023-09-01 08:06:18,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-09-01 08:06:18,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-09-01 08:06:18,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:18,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-09-01 08:06:18,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:18,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:18,034 INFO L175 Difference]: Start difference. First operand has 70 places, 130 transitions, 1454 flow. Second operand 3 states and 254 transitions. [2023-09-01 08:06:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 129 transitions, 1706 flow [2023-09-01 08:06:18,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 1705 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:18,064 INFO L231 Difference]: Finished difference. Result has 70 places, 129 transitions, 1453 flow [2023-09-01 08:06:18,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1453, PETRI_PLACES=70, PETRI_TRANSITIONS=129} [2023-09-01 08:06:18,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-09-01 08:06:18,065 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 129 transitions, 1453 flow [2023-09-01 08:06:18,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:18,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:18,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 08:06:18,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:18,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -799674974, now seen corresponding path program 1 times [2023-09-01 08:06:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256636012] [2023-09-01 08:06:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:18,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256636012] [2023-09-01 08:06:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256636012] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:18,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:18,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566442067] [2023-09-01 08:06:18,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:18,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:18,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:18,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-09-01 08:06:18,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 129 transitions, 1453 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:18,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-09-01 08:06:18,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:18,532 INFO L130 PetriNetUnfolder]: 1479/2733 cut-off events. [2023-09-01 08:06:18,532 INFO L131 PetriNetUnfolder]: For 13225/13343 co-relation queries the response was YES. [2023-09-01 08:06:18,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 2733 events. 1479/2733 cut-off events. For 13225/13343 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17271 event pairs, 1029 based on Foata normal form. 197/2922 useless extension candidates. Maximal degree in co-relation 10777. Up to 2729 conditions per place. [2023-09-01 08:06:18,547 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 124 selfloop transitions, 1 changer transitions 1/128 dead transitions. [2023-09-01 08:06:18,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 128 transitions, 1703 flow [2023-09-01 08:06:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-09-01 08:06:18,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48747591522157996 [2023-09-01 08:06:18,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-09-01 08:06:18,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-09-01 08:06:18,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:18,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-09-01 08:06:18,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:18,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:18,552 INFO L175 Difference]: Start difference. First operand has 70 places, 129 transitions, 1453 flow. Second operand 3 states and 253 transitions. [2023-09-01 08:06:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 128 transitions, 1703 flow [2023-09-01 08:06:18,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 128 transitions, 1702 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:18,584 INFO L231 Difference]: Finished difference. Result has 70 places, 127 transitions, 1449 flow [2023-09-01 08:06:18,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1449, PETRI_PLACES=70, PETRI_TRANSITIONS=127} [2023-09-01 08:06:18,585 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-09-01 08:06:18,585 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 127 transitions, 1449 flow [2023-09-01 08:06:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:18,586 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 08:06:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 08:06:18,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:18,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -325022071, now seen corresponding path program 3 times [2023-09-01 08:06:18,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:18,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963423408] [2023-09-01 08:06:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963423408] [2023-09-01 08:06:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963423408] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:18,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898347290] [2023-09-01 08:06:18,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:06:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:18,745 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) [2023-09-01 08:06:18,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:06:18,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 08:06:18,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:06:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:18,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898347290] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:19,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:19,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 08:06:19,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113375762] [2023-09-01 08:06:19,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:19,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:06:19,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:19,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:06:19,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 08:06:19,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:19,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 127 transitions, 1449 flow. Second operand has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:19,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:19,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:19,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:20,320 INFO L130 PetriNetUnfolder]: 3975/7051 cut-off events. [2023-09-01 08:06:20,320 INFO L131 PetriNetUnfolder]: For 119469/119737 co-relation queries the response was YES. [2023-09-01 08:06:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27114 conditions, 7051 events. 3975/7051 cut-off events. For 119469/119737 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 45587 event pairs, 265 based on Foata normal form. 1120/8167 useless extension candidates. Maximal degree in co-relation 27080. Up to 1270 conditions per place. [2023-09-01 08:06:20,359 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 177 selfloop transitions, 323 changer transitions 0/502 dead transitions. [2023-09-01 08:06:20,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 502 transitions, 5516 flow [2023-09-01 08:06:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:06:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:06:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2246 transitions. [2023-09-01 08:06:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409441233140655 [2023-09-01 08:06:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2246 transitions. [2023-09-01 08:06:20,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2246 transitions. [2023-09-01 08:06:20,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:20,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2246 transitions. [2023-09-01 08:06:20,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.58333333333333) internal successors, (2246), 24 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:20,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:20,379 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:20,379 INFO L175 Difference]: Start difference. First operand has 70 places, 127 transitions, 1449 flow. Second operand 24 states and 2246 transitions. [2023-09-01 08:06:20,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 502 transitions, 5516 flow [2023-09-01 08:06:20,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 502 transitions, 5515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:20,425 INFO L231 Difference]: Finished difference. Result has 113 places, 348 transitions, 5567 flow [2023-09-01 08:06:20,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5567, PETRI_PLACES=113, PETRI_TRANSITIONS=348} [2023-09-01 08:06:20,427 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-09-01 08:06:20,427 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 348 transitions, 5567 flow [2023-09-01 08:06:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:20,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:20,428 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:20,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:20,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:20,634 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:20,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1086658960, now seen corresponding path program 2 times [2023-09-01 08:06:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226856074] [2023-09-01 08:06:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:06:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226856074] [2023-09-01 08:06:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226856074] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907696295] [2023-09-01 08:06:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:20,721 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) [2023-09-01 08:06:20,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:06:20,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:06:20,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:20,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 08:06:20,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:06:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907696295] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:20,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:06:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:06:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052200267] [2023-09-01 08:06:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:06:20,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 08:06:20,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 348 transitions, 5567 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:20,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:20,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 08:06:20,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:21,828 INFO L130 PetriNetUnfolder]: 3474/6153 cut-off events. [2023-09-01 08:06:21,829 INFO L131 PetriNetUnfolder]: For 73450/73712 co-relation queries the response was YES. [2023-09-01 08:06:21,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28006 conditions, 6153 events. 3474/6153 cut-off events. For 73450/73712 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 39936 event pairs, 2374 based on Foata normal form. 630/6775 useless extension candidates. Maximal degree in co-relation 27949. Up to 6149 conditions per place. [2023-09-01 08:06:21,870 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 286 selfloop transitions, 1 changer transitions 0/289 dead transitions. [2023-09-01 08:06:21,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 289 transitions, 4939 flow [2023-09-01 08:06:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-09-01 08:06:21,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951830443159923 [2023-09-01 08:06:21,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-09-01 08:06:21,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-09-01 08:06:21,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:21,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-09-01 08:06:21,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:21,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:21,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 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) [2023-09-01 08:06:21,875 INFO L175 Difference]: Start difference. First operand has 113 places, 348 transitions, 5567 flow. Second operand 3 states and 257 transitions. [2023-09-01 08:06:21,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 289 transitions, 4939 flow [2023-09-01 08:06:22,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 289 transitions, 3656 flow, removed 464 selfloop flow, removed 9 redundant places. [2023-09-01 08:06:22,096 INFO L231 Difference]: Finished difference. Result has 105 places, 289 transitions, 3084 flow [2023-09-01 08:06:22,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3084, PETRI_PLACES=105, PETRI_TRANSITIONS=289} [2023-09-01 08:06:22,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2023-09-01 08:06:22,097 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 289 transitions, 3084 flow [2023-09-01 08:06:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:22,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:22,097 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-09-01 08:06:22,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 08:06:22,303 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,SelfDestructingSolverStorable14 [2023-09-01 08:06:22,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:22,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -415130039, now seen corresponding path program 4 times [2023-09-01 08:06:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616054599] [2023-09-01 08:06:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616054599] [2023-09-01 08:06:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616054599] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844801114] [2023-09-01 08:06:22,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:06:22,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:22,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:22,768 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) [2023-09-01 08:06:22,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:06:22,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:06:22,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:06:22,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:22,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:23,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844801114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:23,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:23,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-09-01 08:06:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567803843] [2023-09-01 08:06:23,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 08:06:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 08:06:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 08:06:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:23,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 289 transitions, 3084 flow. Second operand has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:23,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:23,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:23,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:26,400 INFO L130 PetriNetUnfolder]: 8918/15712 cut-off events. [2023-09-01 08:06:26,400 INFO L131 PetriNetUnfolder]: For 806588/806866 co-relation queries the response was YES. [2023-09-01 08:06:26,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53678 conditions, 15712 events. 8918/15712 cut-off events. For 806588/806866 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 103551 event pairs, 387 based on Foata normal form. 1818/17528 useless extension candidates. Maximal degree in co-relation 53628. Up to 3280 conditions per place. [2023-09-01 08:06:26,473 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 205 selfloop transitions, 766 changer transitions 138/1111 dead transitions. [2023-09-01 08:06:26,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1111 transitions, 10543 flow [2023-09-01 08:06:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 08:06:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 08:06:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4455 transitions. [2023-09-01 08:06:26,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364884393063584 [2023-09-01 08:06:26,485 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4455 transitions. [2023-09-01 08:06:26,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4455 transitions. [2023-09-01 08:06:26,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:26,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4455 transitions. [2023-09-01 08:06:26,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 92.8125) internal successors, (4455), 48 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,526 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,526 INFO L175 Difference]: Start difference. First operand has 105 places, 289 transitions, 3084 flow. Second operand 48 states and 4455 transitions. [2023-09-01 08:06:26,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1111 transitions, 10543 flow [2023-09-01 08:06:26,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1111 transitions, 10542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:26,656 INFO L231 Difference]: Finished difference. Result has 197 places, 789 transitions, 10856 flow [2023-09-01 08:06:26,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=10856, PETRI_PLACES=197, PETRI_TRANSITIONS=789} [2023-09-01 08:06:26,657 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2023-09-01 08:06:26,657 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 789 transitions, 10856 flow [2023-09-01 08:06:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:26,659 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-09-01 08:06:26,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:26,865 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,SelfDestructingSolverStorable15 [2023-09-01 08:06:26,865 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:26,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash -395911735, now seen corresponding path program 5 times [2023-09-01 08:06:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061876431] [2023-09-01 08:06:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:28,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:28,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061876431] [2023-09-01 08:06:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061876431] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058395496] [2023-09-01 08:06:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:06:28,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:28,293 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) [2023-09-01 08:06:28,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:06:28,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-09-01 08:06:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 08:06:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:28,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058395496] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:30,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:30,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-09-01 08:06:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790682653] [2023-09-01 08:06:30,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-09-01 08:06:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-09-01 08:06:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-09-01 08:06:31,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:06:31,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 789 transitions, 10856 flow. Second operand has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:31,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:31,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:06:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:45,049 INFO L130 PetriNetUnfolder]: 24442/42936 cut-off events. [2023-09-01 08:06:45,050 INFO L131 PetriNetUnfolder]: For 9369612/9370178 co-relation queries the response was YES. [2023-09-01 08:06:45,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180937 conditions, 42936 events. 24442/42936 cut-off events. For 9369612/9370178 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 300183 event pairs, 619 based on Foata normal form. 3594/46528 useless extension candidates. Maximal degree in co-relation 180840. Up to 11359 conditions per place. [2023-09-01 08:06:45,516 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 397 selfloop transitions, 2346 changer transitions 282/3027 dead transitions. [2023-09-01 08:06:45,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 3027 transitions, 41017 flow [2023-09-01 08:06:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-09-01 08:06:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-09-01 08:06:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8919 transitions. [2023-09-01 08:06:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370303468208093 [2023-09-01 08:06:45,533 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8919 transitions. [2023-09-01 08:06:45,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8919 transitions. [2023-09-01 08:06:45,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:45,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8919 transitions. [2023-09-01 08:06:45,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 92.90625) internal successors, (8919), 96 states have internal predecessors, (8919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:45,573 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:45,573 INFO L175 Difference]: Start difference. First operand has 197 places, 789 transitions, 10856 flow. Second operand 96 states and 8919 transitions. [2023-09-01 08:06:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 3027 transitions, 41017 flow [2023-09-01 08:06:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3027 transitions, 29461 flow, removed 5574 selfloop flow, removed 11 redundant places. [2023-09-01 08:06:47,161 INFO L231 Difference]: Finished difference. Result has 375 places, 2369 transitions, 31687 flow [2023-09-01 08:06:47,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=31687, PETRI_PLACES=375, PETRI_TRANSITIONS=2369} [2023-09-01 08:06:47,162 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2023-09-01 08:06:47,162 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 2369 transitions, 31687 flow [2023-09-01 08:06:47,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:47,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:47,165 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-09-01 08:06:47,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:47,374 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,SelfDestructingSolverStorable16 [2023-09-01 08:06:47,374 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:47,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -360850231, now seen corresponding path program 6 times [2023-09-01 08:06:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:47,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569702372] [2023-09-01 08:06:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569702372] [2023-09-01 08:06:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569702372] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222096810] [2023-09-01 08:06:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:06:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:52,713 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) [2023-09-01 08:06:52,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:06:52,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-09-01 08:06:52,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 08:06:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:07:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:07:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222096810] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:07:01,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:07:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-09-01 08:07:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819721608] [2023-09-01 08:07:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:07:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-09-01 08:07:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:07:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-09-01 08:07:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-09-01 08:07:02,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:07:02,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 2369 transitions, 31687 flow. Second operand has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:02,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:07:02,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:07:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:08:48,310 INFO L130 PetriNetUnfolder]: 73950/129680 cut-off events. [2023-09-01 08:08:48,311 INFO L131 PetriNetUnfolder]: For 78281205/78282347 co-relation queries the response was YES. [2023-09-01 08:08:52,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546572 conditions, 129680 events. 73950/129680 cut-off events. For 78281205/78282347 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 976756 event pairs, 1043 based on Foata normal form. 7146/136824 useless extension candidates. Maximal degree in co-relation 546390. Up to 34111 conditions per place. [2023-09-01 08:08:52,510 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 781 selfloop transitions, 7814 changer transitions 570/9167 dead transitions. [2023-09-01 08:08:52,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 9167 transitions, 130600 flow [2023-09-01 08:08:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-09-01 08:08:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-09-01 08:08:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 17847 transitions. [2023-09-01 08:08:52,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373013005780347 [2023-09-01 08:08:52,537 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 17847 transitions. [2023-09-01 08:08:52,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 17847 transitions. [2023-09-01 08:08:52,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:08:52,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 17847 transitions. [2023-09-01 08:08:52,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 92.953125) internal successors, (17847), 192 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:52,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:52,609 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:52,609 INFO L175 Difference]: Start difference. First operand has 375 places, 2369 transitions, 31687 flow. Second operand 192 states and 17847 transitions. [2023-09-01 08:08:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 9167 transitions, 130600 flow [2023-09-01 08:09:07,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 9167 transitions, 90876 flow, removed 19230 selfloop flow, removed 23 redundant places. [2023-09-01 08:09:07,604 INFO L231 Difference]: Finished difference. Result has 733 places, 7837 transitions, 101542 flow [2023-09-01 08:09:07,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=27237, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=101542, PETRI_PLACES=733, PETRI_TRANSITIONS=7837} [2023-09-01 08:09:07,607 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 704 predicate places. [2023-09-01 08:09:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 7837 transitions, 101542 flow [2023-09-01 08:09:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:07,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:07,611 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-09-01 08:09:07,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:07,817 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,SelfDestructingSolverStorable17 [2023-09-01 08:09:07,817 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:09:07,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 803068617, now seen corresponding path program 7 times [2023-09-01 08:09:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58860236] [2023-09-01 08:09:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:24,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58860236] [2023-09-01 08:09:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58860236] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126899467] [2023-09-01 08:09:24,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:09:24,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:24,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:24,562 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) [2023-09-01 08:09:24,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:09:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2023-09-01 08:09:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:25,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126899467] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:58,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:58,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-09-01 08:09:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769778479] [2023-09-01 08:09:58,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-09-01 08:09:58,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-09-01 08:09:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-09-01 08:10:01,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-09-01 08:10:01,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 7837 transitions, 101542 flow. Second operand has 385 states, 385 states have (on average 83.01038961038961) internal successors, (31959), 385 states have internal predecessors, (31959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:01,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:01,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-09-01 08:10:01,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand