./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.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.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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --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 08:06:06,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:06:06,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:06:06,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:06:06,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:06:06,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:06:06,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:06:06,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:06:06,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:06:06,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:06:06,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:06:06,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:06:06,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:06:06,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:06:06,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:06:06,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:06:06,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:06:06,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:06:06,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:06:06,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:06:06,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:06:06,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:06:06,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:06:06,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:06:06,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:06:06,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:06:06,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:06:06,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:06:06,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:06:06,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:06:06,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:06:06,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:06:06,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:06:06,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:06:06,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:06:06,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:06:06,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:06:06,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:06:06,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:06:06,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:06:06,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:06:06,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:06:07,013 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:06:07,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:06:07,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:06:07,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:06:07,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:06:07,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:06:07,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:06:07,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:06:07,016 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:06:07,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:06:07,017 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:06:07,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:06:07,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:06:07,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:06:07,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:06:07,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:06:07,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:06:07,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:06:07,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:06:07,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:06:07,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:06:07,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:06:07,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:06:07,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:06:07,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:06:07,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:06:07,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:06:07,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:06:07,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:06:07,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:06:07,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:06:07,363 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:06:07,364 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:06:07,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-09-01 08:06:08,598 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:06:08,832 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:06:08,833 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-09-01 08:06:08,840 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773c76b10/00f27e636f2a46bc80764b8635475bcc/FLAG0e55f444f [2023-09-01 08:06:08,861 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773c76b10/00f27e636f2a46bc80764b8635475bcc [2023-09-01 08:06:08,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:06:08,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:06:08,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:08,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:06:08,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:06:08,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591d0fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:08, skipping insertion in model container [2023-09-01 08:06:08,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:08" (1/1) ... [2023-09-01 08:06:08,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:06:08,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:06:09,055 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.wvr.c[1991,2004] [2023-09-01 08:06:09,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:09,069 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:06:09,099 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.wvr.c[1991,2004] [2023-09-01 08:06:09,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:09,105 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:09,105 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:09,111 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:06:09,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09 WrapperNode [2023-09-01 08:06:09,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:09,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:09,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:06:09,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:06:09,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,149 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-09-01 08:06:09,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:09,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:06:09,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:06:09,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:06:09,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:06:09,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:06:09,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:06:09,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:06:09,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (1/1) ... [2023-09-01 08:06:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:06:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:09,224 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 08:06:09,235 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 08:06:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:06:09,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:06:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:06:09,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:06:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:06:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:06:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:06:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:06:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:06:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:06:09,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:06:09,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:06:09,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:06:09,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:06:09,296 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 08:06:09,427 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:06:09,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:06:09,725 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:06:09,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:06:09,792 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:06:09,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:09 BoogieIcfgContainer [2023-09-01 08:06:09,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:06:09,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:06:09,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:06:09,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:06:09,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:06:08" (1/3) ... [2023-09-01 08:06:09,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ecdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:09, skipping insertion in model container [2023-09-01 08:06:09,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:09" (2/3) ... [2023-09-01 08:06:09,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ecdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:09, skipping insertion in model container [2023-09-01 08:06:09,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:09" (3/3) ... [2023-09-01 08:06:09,804 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-09-01 08:06:09,811 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:06:09,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:06:09,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-09-01 08:06:09,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:06:09,909 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:06:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 83 transitions, 182 flow [2023-09-01 08:06:10,016 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-09-01 08:06:10,017 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:06:10,022 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 86 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-09-01 08:06:10,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 83 transitions, 182 flow [2023-09-01 08:06:10,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 65 transitions, 139 flow [2023-09-01 08:06:10,031 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:06:10,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 65 transitions, 139 flow [2023-09-01 08:06:10,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 65 transitions, 139 flow [2023-09-01 08:06:10,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 139 flow [2023-09-01 08:06:10,084 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2023-09-01 08:06:10,084 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:06:10,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 4/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-09-01 08:06:10,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-09-01 08:06:12,281 INFO L134 LiptonReduction]: Checked pairs total: 1068 [2023-09-01 08:06:12,281 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-09-01 08:06:12,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:06:12,297 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;@674f3fda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:06:12,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-09-01 08:06:12,301 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-09-01 08:06:12,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:06:12,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:12,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:12,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 10650263, now seen corresponding path program 1 times [2023-09-01 08:06:12,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:12,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342028736] [2023-09-01 08:06:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,501 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 08:06:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342028736] [2023-09-01 08:06:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342028736] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:12,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197753580] [2023-09-01 08:06:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:12,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:12,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:12,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:12,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 08:06:12,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:12,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:12,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:12,641 INFO L130 PetriNetUnfolder]: 215/331 cut-off events. [2023-09-01 08:06:12,641 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 08:06:12,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 331 events. 215/331 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1223 event pairs, 41 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 595. Up to 303 conditions per place. [2023-09-01 08:06:12,645 INFO L137 encePairwiseOnDemand]: 130/141 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2023-09-01 08:06:12,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2023-09-01 08:06:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-09-01 08:06:12,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-09-01 08:06:12,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-09-01 08:06:12,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-09-01 08:06:12,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:12,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-09-01 08:06:12,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 08:06:12,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:12,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:12,669 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 240 transitions. [2023-09-01 08:06:12,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2023-09-01 08:06:12,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:06:12,673 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2023-09-01 08:06:12,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-09-01 08:06:12,678 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-09-01 08:06:12,678 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2023-09-01 08:06:12,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 08:06:12,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:12,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:12,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:06:12,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:12,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 330159579, now seen corresponding path program 1 times [2023-09-01 08:06:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:12,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5706472] [2023-09-01 08:06:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,767 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 08:06:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5706472] [2023-09-01 08:06:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5706472] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215867912] [2023-09-01 08:06:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:12,779 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 08:06:12,781 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 08:06:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:12,887 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 08:06:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:12,903 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 08:06:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215867912] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:12,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:06:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549006043] [2023-09-01 08:06:12,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:12,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-09-01 08:06:12,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 08:06:12,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:12,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-09-01 08:06:12,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,220 INFO L130 PetriNetUnfolder]: 636/960 cut-off events. [2023-09-01 08:06:13,220 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-09-01 08:06:13,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2559 conditions, 960 events. 636/960 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 4596 event pairs, 80 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1960. Up to 588 conditions per place. [2023-09-01 08:06:13,227 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 68 selfloop transitions, 9 changer transitions 3/81 dead transitions. [2023-09-01 08:06:13,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 81 transitions, 420 flow [2023-09-01 08:06:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:06:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:06:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2023-09-01 08:06:13,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612968591691996 [2023-09-01 08:06:13,231 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2023-09-01 08:06:13,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2023-09-01 08:06:13,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2023-09-01 08:06:13,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 08:06:13,237 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 08:06:13,237 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 7 states and 554 transitions. [2023-09-01 08:06:13,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 81 transitions, 420 flow [2023-09-01 08:06:13,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 81 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:13,239 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 127 flow [2023-09-01 08:06:13,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-09-01 08:06:13,240 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-09-01 08:06:13,240 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 127 flow [2023-09-01 08:06:13,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 08:06:13,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 08:06:13,250 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 08:06:13,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:13,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:13,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1645012697, now seen corresponding path program 1 times [2023-09-01 08:06:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:13,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573640864] [2023-09-01 08:06:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,542 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 08:06:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573640864] [2023-09-01 08:06:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573640864] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803893424] [2023-09-01 08:06:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:13,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:13,544 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 08:06:13,561 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 08:06:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:06:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:13,619 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 08:06:13,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:06:13,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803893424] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:13,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:06:13,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-09-01 08:06:13,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008728587] [2023-09-01 08:06:13,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:06:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:06:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:06:13,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-09-01 08:06:13,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:13,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-09-01 08:06:13,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,810 INFO L130 PetriNetUnfolder]: 577/887 cut-off events. [2023-09-01 08:06:13,811 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-09-01 08:06:13,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 887 events. 577/887 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4165 event pairs, 33 based on Foata normal form. 28/607 useless extension candidates. Maximal degree in co-relation 2233. Up to 656 conditions per place. [2023-09-01 08:06:13,817 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 40 selfloop transitions, 3 changer transitions 3/47 dead transitions. [2023-09-01 08:06:13,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 260 flow [2023-09-01 08:06:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:06:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:06:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-09-01 08:06:13,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404255319148936 [2023-09-01 08:06:13,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-09-01 08:06:13,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-09-01 08:06:13,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-09-01 08:06:13,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 08:06:13,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 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 08:06:13,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 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 08:06:13,823 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 127 flow. Second operand 5 states and 381 transitions. [2023-09-01 08:06:13,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 260 flow [2023-09-01 08:06:13,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:13,829 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 104 flow [2023-09-01 08:06:13,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-09-01 08:06:13,831 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-09-01 08:06:13,831 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 104 flow [2023-09-01 08:06:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 08:06:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:13,843 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 08:06:14,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 08:06:14,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:14,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash 330159545, now seen corresponding path program 1 times [2023-09-01 08:06:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:14,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082967013] [2023-09-01 08:06:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,087 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 08:06:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082967013] [2023-09-01 08:06:14,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082967013] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433771132] [2023-09-01 08:06:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:14,089 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 08:06:14,091 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 08:06:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:14,152 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 08:06:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:14,172 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 08:06:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433771132] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:14,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:06:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11775611] [2023-09-01 08:06:14,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:14,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:14,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:14,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:14,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:14,376 INFO L130 PetriNetUnfolder]: 681/1169 cut-off events. [2023-09-01 08:06:14,376 INFO L131 PetriNetUnfolder]: For 437/437 co-relation queries the response was YES. [2023-09-01 08:06:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 1169 events. 681/1169 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6014 event pairs, 89 based on Foata normal form. 72/1021 useless extension candidates. Maximal degree in co-relation 3080. Up to 579 conditions per place. [2023-09-01 08:06:14,384 INFO L137 encePairwiseOnDemand]: 132/141 looper letters, 50 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2023-09-01 08:06:14,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 81 transitions, 499 flow [2023-09-01 08:06:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:06:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:06:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 561 transitions. [2023-09-01 08:06:14,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683890577507599 [2023-09-01 08:06:14,387 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 561 transitions. [2023-09-01 08:06:14,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 561 transitions. [2023-09-01 08:06:14,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:14,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 561 transitions. [2023-09-01 08:06:14,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.14285714285714) internal successors, (561), 7 states have internal predecessors, (561), 0 states have call successors, (0), 0 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 08:06:14,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 08:06:14,391 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 08:06:14,391 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 104 flow. Second operand 7 states and 561 transitions. [2023-09-01 08:06:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 81 transitions, 499 flow [2023-09-01 08:06:14,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 81 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:06:14,397 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 402 flow [2023-09-01 08:06:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-09-01 08:06:14,398 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-09-01 08:06:14,398 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 402 flow [2023-09-01 08:06:14,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:14,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:14,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:14,412 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 08:06:14,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:14,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:14,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash 330159544, now seen corresponding path program 1 times [2023-09-01 08:06:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:14,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996103130] [2023-09-01 08:06:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,668 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 08:06:14,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996103130] [2023-09-01 08:06:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996103130] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:14,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734415597] [2023-09-01 08:06:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:14,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:14,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 08:06:14,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:14,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:14,808 INFO L130 PetriNetUnfolder]: 593/1038 cut-off events. [2023-09-01 08:06:14,808 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-09-01 08:06:14,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 1038 events. 593/1038 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5363 event pairs, 375 based on Foata normal form. 92/942 useless extension candidates. Maximal degree in co-relation 3997. Up to 1034 conditions per place. [2023-09-01 08:06:14,816 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 08:06:14,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 451 flow [2023-09-01 08:06:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-09-01 08:06:14,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-09-01 08:06:14,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-09-01 08:06:14,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-09-01 08:06:14,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:14,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-09-01 08:06:14,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 08:06:14,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:14,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:14,820 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 402 flow. Second operand 3 states and 221 transitions. [2023-09-01 08:06:14,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 451 flow [2023-09-01 08:06:14,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 401 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:14,840 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 323 flow [2023-09-01 08:06:14,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-09-01 08:06:14,842 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-09-01 08:06:14,842 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 323 flow [2023-09-01 08:06:14,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 08:06:14,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:14,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:14,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:06:14,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:14,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 309225381, now seen corresponding path program 1 times [2023-09-01 08:06:14,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:14,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396815602] [2023-09-01 08:06:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:14,920 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 08:06:14,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396815602] [2023-09-01 08:06:14,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396815602] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:14,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:14,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453769627] [2023-09-01 08:06:14,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:14,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-09-01 08:06:14,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 08:06:14,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:14,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-09-01 08:06:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:15,062 INFO L130 PetriNetUnfolder]: 587/1071 cut-off events. [2023-09-01 08:06:15,063 INFO L131 PetriNetUnfolder]: For 1488/1488 co-relation queries the response was YES. [2023-09-01 08:06:15,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 1071 events. 587/1071 cut-off events. For 1488/1488 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5661 event pairs, 343 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 3769. Up to 887 conditions per place. [2023-09-01 08:06:15,069 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 53 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-09-01 08:06:15,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 547 flow [2023-09-01 08:06:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-09-01 08:06:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2023-09-01 08:06:15,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-09-01 08:06:15,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-09-01 08:06:15,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:15,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-09-01 08:06:15,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 08:06:15,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:15,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:15,072 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 323 flow. Second operand 3 states and 230 transitions. [2023-09-01 08:06:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 547 flow [2023-09-01 08:06:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 544 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:15,077 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 372 flow [2023-09-01 08:06:15,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-09-01 08:06:15,078 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-09-01 08:06:15,078 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 372 flow [2023-09-01 08:06:15,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 08:06:15,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:15,078 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:06:15,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:06:15,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:15,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash 309248762, now seen corresponding path program 2 times [2023-09-01 08:06:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:15,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14444269] [2023-09-01 08:06:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:15,145 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 08:06:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:15,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14444269] [2023-09-01 08:06:15,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14444269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:15,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47266269] [2023-09-01 08:06:15,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:15,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:15,148 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 08:06:15,151 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 08:06:15,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:06:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:15,221 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 08:06:15,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:06:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47266269] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:15,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:06:15,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:06:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754681977] [2023-09-01 08:06:15,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:15,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:15,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:06:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-09-01 08:06:15,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 08:06:15,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:15,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-09-01 08:06:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:15,329 INFO L130 PetriNetUnfolder]: 394/729 cut-off events. [2023-09-01 08:06:15,330 INFO L131 PetriNetUnfolder]: For 1299/1322 co-relation queries the response was YES. [2023-09-01 08:06:15,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2657 conditions, 729 events. 394/729 cut-off events. For 1299/1322 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3705 event pairs, 300 based on Foata normal form. 47/712 useless extension candidates. Maximal degree in co-relation 2639. Up to 725 conditions per place. [2023-09-01 08:06:15,334 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 08:06:15,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 363 flow [2023-09-01 08:06:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-09-01 08:06:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130023640661938 [2023-09-01 08:06:15,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-09-01 08:06:15,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-09-01 08:06:15,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:15,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-09-01 08:06:15,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 08:06:15,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:15,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:15,341 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 372 flow. Second operand 3 states and 217 transitions. [2023-09-01 08:06:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 363 flow [2023-09-01 08:06:15,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 344 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:06:15,344 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 276 flow [2023-09-01 08:06:15,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-09-01 08:06:15,345 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-09-01 08:06:15,345 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 276 flow [2023-09-01 08:06:15,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 08:06:15,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:15,346 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:06:15,352 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 08:06:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:15,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:15,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash 309248728, now seen corresponding path program 2 times [2023-09-01 08:06:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:15,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675944252] [2023-09-01 08:06:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:15,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:15,630 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 08:06:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675944252] [2023-09-01 08:06:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675944252] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223766678] [2023-09-01 08:06:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:15,635 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 08:06:15,638 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 08:06:15,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:06:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:06:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:15,710 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 08:06:15,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:15,766 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 08:06:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223766678] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:15,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:06:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235877033] [2023-09-01 08:06:15,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 08:06:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 08:06:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:06:15,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:15,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 276 flow. Second operand has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 08:06:15,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:15,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:15,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:16,056 INFO L130 PetriNetUnfolder]: 892/1628 cut-off events. [2023-09-01 08:06:16,057 INFO L131 PetriNetUnfolder]: For 5161/5223 co-relation queries the response was YES. [2023-09-01 08:06:16,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5681 conditions, 1628 events. 892/1628 cut-off events. For 5161/5223 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9378 event pairs, 139 based on Foata normal form. 278/1764 useless extension candidates. Maximal degree in co-relation 5665. Up to 453 conditions per place. [2023-09-01 08:06:16,067 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 87 selfloop transitions, 67 changer transitions 0/156 dead transitions. [2023-09-01 08:06:16,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 156 transitions, 1234 flow [2023-09-01 08:06:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:06:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:06:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 950 transitions. [2023-09-01 08:06:16,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614657210401891 [2023-09-01 08:06:16,070 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 950 transitions. [2023-09-01 08:06:16,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 950 transitions. [2023-09-01 08:06:16,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:16,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 950 transitions. [2023-09-01 08:06:16,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.16666666666667) internal successors, (950), 12 states have internal predecessors, (950), 0 states have call successors, (0), 0 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 08:06:16,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 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 08:06:16,075 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 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 08:06:16,076 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 276 flow. Second operand 12 states and 950 transitions. [2023-09-01 08:06:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 156 transitions, 1234 flow [2023-09-01 08:06:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 156 transitions, 1233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:16,081 INFO L231 Difference]: Finished difference. Result has 59 places, 86 transitions, 1075 flow [2023-09-01 08:06:16,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1075, PETRI_PLACES=59, PETRI_TRANSITIONS=86} [2023-09-01 08:06:16,082 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2023-09-01 08:06:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 86 transitions, 1075 flow [2023-09-01 08:06:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 08:06:16,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:16,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:16,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 08:06:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:16,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:16,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2072971818, now seen corresponding path program 1 times [2023-09-01 08:06:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733935564] [2023-09-01 08:06:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:06:16,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733935564] [2023-09-01 08:06:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733935564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:16,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64743287] [2023-09-01 08:06:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:16,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-09-01 08:06:16,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 86 transitions, 1075 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 08:06:16,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:16,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-09-01 08:06:16,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:16,522 INFO L130 PetriNetUnfolder]: 790/1434 cut-off events. [2023-09-01 08:06:16,522 INFO L131 PetriNetUnfolder]: For 5865/5865 co-relation queries the response was YES. [2023-09-01 08:06:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5786 conditions, 1434 events. 790/1434 cut-off events. For 5865/5865 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7785 event pairs, 192 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 5759. Up to 1248 conditions per place. [2023-09-01 08:06:16,533 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 86 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-09-01 08:06:16,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 1204 flow [2023-09-01 08:06:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-09-01 08:06:16,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2023-09-01 08:06:16,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-09-01 08:06:16,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-09-01 08:06:16,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:16,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-09-01 08:06:16,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 08:06:16,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:16,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 08:06:16,537 INFO L175 Difference]: Start difference. First operand has 59 places, 86 transitions, 1075 flow. Second operand 3 states and 222 transitions. [2023-09-01 08:06:16,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 1204 flow [2023-09-01 08:06:16,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 1014 flow, removed 95 selfloop flow, removed 0 redundant places. [2023-09-01 08:06:16,558 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 711 flow [2023-09-01 08:06:16,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=711, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2023-09-01 08:06:16,559 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2023-09-01 08:06:16,559 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 711 flow [2023-09-01 08:06:16,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 08:06:16,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:16,560 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 08:06:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 08:06:16,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:16,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2097862856, now seen corresponding path program 3 times [2023-09-01 08:06:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:16,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567878094] [2023-09-01 08:06:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:16,713 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 08:06:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567878094] [2023-09-01 08:06:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567878094] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740458217] [2023-09-01 08:06:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:06:16,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:16,717 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 08:06:16,720 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 08:06:16,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 08:06:16,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:16,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:06:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:16,811 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 08:06:16,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:17,004 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 08:06:17,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740458217] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:17,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:17,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 08:06:17,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941882623] [2023-09-01 08:06:17,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:06:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:06:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 08:06:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:17,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 711 flow. Second operand has 25 states, 25 states have (on average 69.16) internal successors, (1729), 25 states have internal predecessors, (1729), 0 states have call successors, (0), 0 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 08:06:17,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:17,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:17,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:17,639 INFO L130 PetriNetUnfolder]: 1679/3013 cut-off events. [2023-09-01 08:06:17,639 INFO L131 PetriNetUnfolder]: For 46614/46748 co-relation queries the response was YES. [2023-09-01 08:06:17,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10315 conditions, 3013 events. 1679/3013 cut-off events. For 46614/46748 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 16894 event pairs, 173 based on Foata normal form. 510/3521 useless extension candidates. Maximal degree in co-relation 10287. Up to 610 conditions per place. [2023-09-01 08:06:17,656 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 103 selfloop transitions, 159 changer transitions 66/330 dead transitions. [2023-09-01 08:06:17,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 330 transitions, 2664 flow [2023-09-01 08:06:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:06:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:06:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1887 transitions. [2023-09-01 08:06:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576241134751773 [2023-09-01 08:06:17,661 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1887 transitions. [2023-09-01 08:06:17,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1887 transitions. [2023-09-01 08:06:17,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:17,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1887 transitions. [2023-09-01 08:06:17,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.625) internal successors, (1887), 24 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 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 08:06:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 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 08:06:17,671 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 711 flow. Second operand 24 states and 1887 transitions. [2023-09-01 08:06:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 330 transitions, 2664 flow [2023-09-01 08:06:17,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 330 transitions, 2653 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:17,698 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 2355 flow [2023-09-01 08:06:17,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2355, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2023-09-01 08:06:17,698 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 78 predicate places. [2023-09-01 08:06:17,699 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 2355 flow [2023-09-01 08:06:17,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.16) internal successors, (1729), 25 states have internal predecessors, (1729), 0 states have call successors, (0), 0 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 08:06:17,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:17,702 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-09-01 08:06:17,711 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 08:06:17,911 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 08:06:17,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:17,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash 866752504, now seen corresponding path program 4 times [2023-09-01 08:06:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907156198] [2023-09-01 08:06:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:18,394 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 08:06:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907156198] [2023-09-01 08:06:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907156198] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34565005] [2023-09-01 08:06:18,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:06:18,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:18,401 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 08:06:18,404 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 08:06:18,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:06:18,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:06:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:18,536 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 08:06:18,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:19,227 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 08:06:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34565005] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:19,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:19,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-09-01 08:06:19,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939918180] [2023-09-01 08:06:19,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:19,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 08:06:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 08:06:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 08:06:19,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:19,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 2355 flow. Second operand has 49 states, 49 states have (on average 69.08163265306122) internal successors, (3385), 49 states have internal predecessors, (3385), 0 states have call successors, (0), 0 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 08:06:19,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:19,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:21,385 INFO L130 PetriNetUnfolder]: 4819/8541 cut-off events. [2023-09-01 08:06:21,385 INFO L131 PetriNetUnfolder]: For 546622/546900 co-relation queries the response was YES. [2023-09-01 08:06:21,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35602 conditions, 8541 events. 4819/8541 cut-off events. For 546622/546900 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 50907 event pairs, 273 based on Foata normal form. 1038/9577 useless extension candidates. Maximal degree in co-relation 35551. Up to 2379 conditions per place. [2023-09-01 08:06:21,475 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 199 selfloop transitions, 515 changer transitions 138/854 dead transitions. [2023-09-01 08:06:21,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 854 transitions, 9652 flow [2023-09-01 08:06:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 08:06:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 08:06:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3783 transitions. [2023-09-01 08:06:21,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589539007092199 [2023-09-01 08:06:21,485 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3783 transitions. [2023-09-01 08:06:21,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3783 transitions. [2023-09-01 08:06:21,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:21,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3783 transitions. [2023-09-01 08:06:21,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.8125) internal successors, (3783), 48 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 08:06:21,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 141.0) internal successors, (6909), 49 states have internal predecessors, (6909), 0 states have call successors, (0), 0 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 08:06:21,507 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 141.0) internal successors, (6909), 49 states have internal predecessors, (6909), 0 states have call successors, (0), 0 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 08:06:21,507 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 2355 flow. Second operand 48 states and 3783 transitions. [2023-09-01 08:06:21,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 854 transitions, 9652 flow [2023-09-01 08:06:21,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 854 transitions, 7260 flow, removed 1155 selfloop flow, removed 5 redundant places. [2023-09-01 08:06:21,739 INFO L231 Difference]: Finished difference. Result has 192 places, 532 transitions, 7026 flow [2023-09-01 08:06:21,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=7026, PETRI_PLACES=192, PETRI_TRANSITIONS=532} [2023-09-01 08:06:21,740 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 166 predicate places. [2023-09-01 08:06:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 532 transitions, 7026 flow [2023-09-01 08:06:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 69.08163265306122) internal successors, (3385), 49 states have internal predecessors, (3385), 0 states have call successors, (0), 0 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 08:06:21,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:21,742 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-09-01 08:06:21,756 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 08:06:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:21,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:21,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash -971433608, now seen corresponding path program 5 times [2023-09-01 08:06:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721365150] [2023-09-01 08:06:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:23,598 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 08:06:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721365150] [2023-09-01 08:06:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721365150] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36377837] [2023-09-01 08:06:23,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:06:23,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:23,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:23,601 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 08:06:23,611 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 08:06:23,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-09-01 08:06:23,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 08:06:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:23,814 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 08:06:23,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:26,192 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 08:06:26,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36377837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:26,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:26,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-09-01 08:06:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49365214] [2023-09-01 08:06:26,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-09-01 08:06:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-09-01 08:06:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-09-01 08:06:26,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:26,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 532 transitions, 7026 flow. Second operand has 97 states, 97 states have (on average 69.04123711340206) internal successors, (6697), 97 states have internal predecessors, (6697), 0 states have call successors, (0), 0 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 08:06:26,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:26,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:26,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:36,404 INFO L130 PetriNetUnfolder]: 15735/27701 cut-off events. [2023-09-01 08:06:36,404 INFO L131 PetriNetUnfolder]: For 4716051/4716617 co-relation queries the response was YES. [2023-09-01 08:06:36,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116039 conditions, 27701 events. 15735/27701 cut-off events. For 4716051/4716617 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 181681 event pairs, 469 based on Foata normal form. 2094/29793 useless extension candidates. Maximal degree in co-relation 115945. Up to 7621 conditions per place. [2023-09-01 08:06:36,912 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 391 selfloop transitions, 1807 changer transitions 282/2482 dead transitions. [2023-09-01 08:06:36,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 2482 transitions, 31319 flow [2023-09-01 08:06:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-09-01 08:06:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-09-01 08:06:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7575 transitions. [2023-09-01 08:06:36,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596187943262412 [2023-09-01 08:06:36,922 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7575 transitions. [2023-09-01 08:06:36,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7575 transitions. [2023-09-01 08:06:36,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:36,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7575 transitions. [2023-09-01 08:06:36,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 78.90625) internal successors, (7575), 96 states have internal predecessors, (7575), 0 states have call successors, (0), 0 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 08:06:36,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 141.0) internal successors, (13677), 97 states have internal predecessors, (13677), 0 states have call successors, (0), 0 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 08:06:36,959 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 141.0) internal successors, (13677), 97 states have internal predecessors, (13677), 0 states have call successors, (0), 0 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 08:06:36,960 INFO L175 Difference]: Start difference. First operand has 192 places, 532 transitions, 7026 flow. Second operand 96 states and 7575 transitions. [2023-09-01 08:06:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 2482 transitions, 31319 flow [2023-09-01 08:06:38,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 2482 transitions, 22371 flow, removed 4347 selfloop flow, removed 11 redundant places. [2023-09-01 08:06:38,314 INFO L231 Difference]: Finished difference. Result has 370 places, 1824 transitions, 23425 flow [2023-09-01 08:06:38,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=23425, PETRI_PLACES=370, PETRI_TRANSITIONS=1824} [2023-09-01 08:06:38,315 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 344 predicate places. [2023-09-01 08:06:38,316 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1824 transitions, 23425 flow [2023-09-01 08:06:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 69.04123711340206) internal successors, (6697), 97 states have internal predecessors, (6697), 0 states have call successors, (0), 0 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 08:06:38,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:38,318 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-09-01 08:06:38,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:38,527 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,SelfDestructingSolverStorable11 [2023-09-01 08:06:38,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:06:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1638753160, now seen corresponding path program 6 times [2023-09-01 08:06:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213820659] [2023-09-01 08:06:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:43,170 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 08:06:43,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213820659] [2023-09-01 08:06:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213820659] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970029880] [2023-09-01 08:06:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:06:43,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:43,171 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 08:06:43,176 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 08:06:43,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-09-01 08:06:43,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 08:06:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:43,554 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 08:06:43,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:51,947 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 08:06:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970029880] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:51,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-09-01 08:06:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435765636] [2023-09-01 08:06:51,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-09-01 08:06:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-09-01 08:06:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-09-01 08:06:52,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:06:52,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1824 transitions, 23425 flow. Second operand has 193 states, 193 states have (on average 69.02072538860104) internal successors, (13321), 193 states have internal predecessors, (13321), 0 states have call successors, (0), 0 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 08:06:52,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:52,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:06:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:08:20,347 INFO L130 PetriNetUnfolder]: 56027/98317 cut-off events. [2023-09-01 08:08:20,347 INFO L131 PetriNetUnfolder]: For 39906259/39907401 co-relation queries the response was YES. [2023-09-01 08:08:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411872 conditions, 98317 events. 56027/98317 cut-off events. For 39906259/39907401 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 717594 event pairs, 857 based on Foata normal form. 4206/102521 useless extension candidates. Maximal degree in co-relation 411693. Up to 26773 conditions per place. [2023-09-01 08:08:25,295 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 775 selfloop transitions, 6699 changer transitions 570/8046 dead transitions. [2023-09-01 08:08:25,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 8046 transitions, 110518 flow [2023-09-01 08:08:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-09-01 08:08:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-09-01 08:08:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 15159 transitions. [2023-09-01 08:08:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599512411347518 [2023-09-01 08:08:25,313 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 15159 transitions. [2023-09-01 08:08:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 15159 transitions. [2023-09-01 08:08:25,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:08:25,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 15159 transitions. [2023-09-01 08:08:25,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 78.953125) internal successors, (15159), 192 states have internal predecessors, (15159), 0 states have call successors, (0), 0 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 08:08:25,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 141.0) internal successors, (27213), 193 states have internal predecessors, (27213), 0 states have call successors, (0), 0 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 08:08:25,637 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 141.0) internal successors, (27213), 193 states have internal predecessors, (27213), 0 states have call successors, (0), 0 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 08:08:25,652 INFO L175 Difference]: Start difference. First operand has 370 places, 1824 transitions, 23425 flow. Second operand 192 states and 15159 transitions. [2023-09-01 08:08:25,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 8046 transitions, 110518 flow [2023-09-01 08:08:36,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 8046 transitions, 76066 flow, removed 16779 selfloop flow, removed 23 redundant places. [2023-09-01 08:08:37,053 INFO L231 Difference]: Finished difference. Result has 728 places, 6716 transitions, 84312 flow [2023-09-01 08:08:37,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=20839, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=84312, PETRI_PLACES=728, PETRI_TRANSITIONS=6716} [2023-09-01 08:08:37,056 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 702 predicate places. [2023-09-01 08:08:37,056 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 6716 transitions, 84312 flow [2023-09-01 08:08:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 69.02072538860104) internal successors, (13321), 193 states have internal predecessors, (13321), 0 states have call successors, (0), 0 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 08:08:37,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:08:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-09-01 08:08:37,071 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 08:08:37,266 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,SelfDestructingSolverStorable12 [2023-09-01 08:08:37,266 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:08:37,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:08:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1445962360, now seen corresponding path program 7 times [2023-09-01 08:08:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:08:37,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133531809] [2023-09-01 08:08:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:08:37,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:08:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:53,562 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 08:08:53,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:08:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133531809] [2023-09-01 08:08:53,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133531809] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:08:53,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550548900] [2023-09-01 08:08:53,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:08:53,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:08:53,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:08:53,564 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 08:08:53,570 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 08:08:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 193 conjunts are in the unsatisfiable core [2023-09-01 08:08:53,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:08:54,217 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 08:08:54,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:27,459 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 08:09:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550548900] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:27,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-09-01 08:09:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079835598] [2023-09-01 08:09:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-09-01 08:09:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-09-01 08:09:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-09-01 08:09:30,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-09-01 08:09:30,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 6716 transitions, 84312 flow. Second operand has 385 states, 385 states have (on average 69.01038961038961) internal successors, (26569), 385 states have internal predecessors, (26569), 0 states have call successors, (0), 0 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 08:09:30,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:30,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-09-01 08:09:30,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15