./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 TOGETHER --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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:25:37,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:25:37,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:25:37,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:25:37,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:25:37,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:25:37,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:25:37,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:25:37,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:25:37,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:25:37,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:25:37,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:25:37,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:25:37,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:25:37,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:25:37,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:25:37,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:25:37,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:25:37,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:25:37,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:25:37,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:25:37,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:25:37,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:25:37,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:25:37,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:25:37,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:25:37,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:25:37,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:25:37,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:25:37,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:25:37,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:25:37,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:25:37,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:25:37,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:25:37,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:25:37,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:25:37,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:25:37,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:25:37,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:25:37,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:25:37,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:25:37,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:25:37,913 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:25:37,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:25:37,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:25:37,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:25:37,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:25:37,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:25:37,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:25:37,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:25:37,917 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:25:37,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:25:37,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:25:37,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:25:37,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:25:37,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:25:37,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:25:37,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:25:37,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:25:37,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:25:37,919 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:25:37,920 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:25:37,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:25:37,924 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:25:37,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:25:37,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:25:37,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:25:37,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:25:37,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:37,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:25:37,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:25:37,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:25:37,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:25:37,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:25:37,928 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:25:37,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:25:37,929 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:25:37,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:25:37,929 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:25:37,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:25:38,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:25:38,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:25:38,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:25:38,252 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:25:38,253 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:25:38,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 15:25:39,466 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:25:39,638 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:25:39,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 15:25:39,647 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36ef4340/79147f26c7b84426bc4f2f3507ec4293/FLAGea0e82c09 [2023-08-30 15:25:39,669 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36ef4340/79147f26c7b84426bc4f2f3507ec4293 [2023-08-30 15:25:39,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:25:39,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:25:39,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:39,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:25:39,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:25:39,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee458cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39, skipping insertion in model container [2023-08-30 15:25:39,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:25:39,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:25:39,819 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] [2023-08-30 15:25:39,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:39,828 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:25:39,844 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] [2023-08-30 15:25:39,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:39,852 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:39,852 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:39,858 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:25:39,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39 WrapperNode [2023-08-30 15:25:39,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:39,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:39,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:25:39,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:25:39,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,888 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-08-30 15:25:39,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:39,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:25:39,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:25:39,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:25:39,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:25:39,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:25:39,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:25:39,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:25:39,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (1/1) ... [2023-08-30 15:25:39,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:39,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:25:39,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:25:39,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:25:39,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:25:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:25:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:25:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:25:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:25:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:25:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:25:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:25:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:25:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:25:39,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:25:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:25:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:25:39,991 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:25:40,092 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:25:40,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:25:40,341 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:25:40,394 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:25:40,394 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 15:25:40,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:40 BoogieIcfgContainer [2023-08-30 15:25:40,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:25:40,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:25:40,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:25:40,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:25:40,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:25:39" (1/3) ... [2023-08-30 15:25:40,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183fe0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:40, skipping insertion in model container [2023-08-30 15:25:40,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:39" (2/3) ... [2023-08-30 15:25:40,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183fe0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:40, skipping insertion in model container [2023-08-30 15:25:40,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:40" (3/3) ... [2023-08-30 15:25:40,404 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-30 15:25:40,411 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:25:40,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:25:40,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 15:25:40,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:25:40,515 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:25:40,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 83 transitions, 182 flow [2023-08-30 15:25:40,588 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-08-30 15:25:40,589 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:25:40,599 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. [2023-08-30 15:25:40,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 83 transitions, 182 flow [2023-08-30 15:25:40,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 65 transitions, 139 flow [2023-08-30 15:25:40,607 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:25:40,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 65 transitions, 139 flow [2023-08-30 15:25:40,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 65 transitions, 139 flow [2023-08-30 15:25:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 139 flow [2023-08-30 15:25:40,634 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2023-08-30 15:25:40,634 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:25:40,635 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. [2023-08-30 15:25:40,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-30 15:25:42,703 INFO L134 LiptonReduction]: Checked pairs total: 1068 [2023-08-30 15:25:42,703 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 15:25:42,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:25:42,721 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;@4adef983, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:25:42,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-30 15:25:42,724 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 15:25:42,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:25:42,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:42,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:42,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:42,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash 10650263, now seen corresponding path program 1 times [2023-08-30 15:25:42,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755120415] [2023-08-30 15:25:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755120415] [2023-08-30 15:25:42,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755120415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:42,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:42,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214204240] [2023-08-30 15:25:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:43,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:43,018 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) [2023-08-30 15:25:43,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:43,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:43,126 INFO L130 PetriNetUnfolder]: 215/331 cut-off events. [2023-08-30 15:25:43,126 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 15:25:43,127 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. [2023-08-30 15:25:43,130 INFO L137 encePairwiseOnDemand]: 130/141 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2023-08-30 15:25:43,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2023-08-30 15:25:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-30 15:25:43,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-08-30 15:25:43,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-30 15:25:43,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-30 15:25:43,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:43,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-30 15:25:43,149 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) [2023-08-30 15:25:43,152 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) [2023-08-30 15:25:43,153 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) [2023-08-30 15:25:43,154 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 240 transitions. [2023-08-30 15:25:43,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2023-08-30 15:25:43,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:25:43,159 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2023-08-30 15:25:43,160 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} [2023-08-30 15:25:43,163 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-30 15:25:43,163 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2023-08-30 15:25:43,164 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) [2023-08-30 15:25:43,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:43,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:43,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:25:43,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:43,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 330159579, now seen corresponding path program 1 times [2023-08-30 15:25:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526949606] [2023-08-30 15:25:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526949606] [2023-08-30 15:25:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526949606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292716224] [2023-08-30 15:25:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:43,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:43,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:25:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292716224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:43,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:43,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:25:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940768527] [2023-08-30 15:25:43,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:43,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 15:25:43,377 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) [2023-08-30 15:25:43,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 15:25:43,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:43,592 INFO L130 PetriNetUnfolder]: 636/960 cut-off events. [2023-08-30 15:25:43,592 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-08-30 15:25:43,594 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. [2023-08-30 15:25:43,599 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 68 selfloop transitions, 9 changer transitions 3/81 dead transitions. [2023-08-30 15:25:43,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 81 transitions, 420 flow [2023-08-30 15:25:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:25:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:25:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2023-08-30 15:25:43,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612968591691996 [2023-08-30 15:25:43,603 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2023-08-30 15:25:43,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2023-08-30 15:25:43,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:43,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2023-08-30 15:25:43,606 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) [2023-08-30 15:25:43,608 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) [2023-08-30 15:25:43,609 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) [2023-08-30 15:25:43,609 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 7 states and 554 transitions. [2023-08-30 15:25:43,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 81 transitions, 420 flow [2023-08-30 15:25:43,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 81 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:43,611 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 127 flow [2023-08-30 15:25:43,612 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} [2023-08-30 15:25:43,612 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-30 15:25:43,613 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 127 flow [2023-08-30 15:25:43,613 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) [2023-08-30 15:25:43,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:43,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 15:25:43,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:43,819 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 [2023-08-30 15:25:43,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:43,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1645012697, now seen corresponding path program 1 times [2023-08-30 15:25:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:43,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808737622] [2023-08-30 15:25:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808737622] [2023-08-30 15:25:43,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808737622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644163234] [2023-08-30 15:25:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:43,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:43,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:25:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:25:43,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:25:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644163234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:43,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:25:43,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-30 15:25:43,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420619716] [2023-08-30 15:25:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:25:43,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:25:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:25:43,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 15:25:43,989 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) [2023-08-30 15:25:43,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 15:25:43,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:44,124 INFO L130 PetriNetUnfolder]: 577/887 cut-off events. [2023-08-30 15:25:44,124 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-30 15:25:44,126 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. [2023-08-30 15:25:44,130 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 40 selfloop transitions, 3 changer transitions 3/47 dead transitions. [2023-08-30 15:25:44,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 260 flow [2023-08-30 15:25:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:25:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:25:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-08-30 15:25:44,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404255319148936 [2023-08-30 15:25:44,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-08-30 15:25:44,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-08-30 15:25:44,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:44,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-08-30 15:25:44,134 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) [2023-08-30 15:25:44,135 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) [2023-08-30 15:25:44,135 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) [2023-08-30 15:25:44,136 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 127 flow. Second operand 5 states and 381 transitions. [2023-08-30 15:25:44,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 260 flow [2023-08-30 15:25:44,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:44,139 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 104 flow [2023-08-30 15:25:44,139 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} [2023-08-30 15:25:44,140 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-30 15:25:44,140 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 104 flow [2023-08-30 15:25:44,140 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) [2023-08-30 15:25:44,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:44,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:44,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:44,346 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 [2023-08-30 15:25:44,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:44,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash 330159545, now seen corresponding path program 1 times [2023-08-30 15:25:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:44,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826625772] [2023-08-30 15:25:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826625772] [2023-08-30 15:25:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826625772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728448012] [2023-08-30 15:25:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:44,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:44,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:44,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:25:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728448012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:44,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:44,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:25:44,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162249628] [2023-08-30 15:25:44,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:44,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:44,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:44,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:44,482 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) [2023-08-30 15:25:44,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:44,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:44,676 INFO L130 PetriNetUnfolder]: 681/1169 cut-off events. [2023-08-30 15:25:44,676 INFO L131 PetriNetUnfolder]: For 437/437 co-relation queries the response was YES. [2023-08-30 15:25:44,678 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. [2023-08-30 15:25:44,682 INFO L137 encePairwiseOnDemand]: 132/141 looper letters, 50 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2023-08-30 15:25:44,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 81 transitions, 499 flow [2023-08-30 15:25:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:25:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:25:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 561 transitions. [2023-08-30 15:25:44,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683890577507599 [2023-08-30 15:25:44,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 561 transitions. [2023-08-30 15:25:44,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 561 transitions. [2023-08-30 15:25:44,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:44,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 561 transitions. [2023-08-30 15:25:44,687 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) [2023-08-30 15:25:44,689 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) [2023-08-30 15:25:44,689 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) [2023-08-30 15:25:44,690 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 104 flow. Second operand 7 states and 561 transitions. [2023-08-30 15:25:44,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 81 transitions, 499 flow [2023-08-30 15:25:44,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 81 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:25:44,695 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 402 flow [2023-08-30 15:25:44,696 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} [2023-08-30 15:25:44,697 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-30 15:25:44,697 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 402 flow [2023-08-30 15:25:44,698 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) [2023-08-30 15:25:44,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:44,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:44,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 15:25:44,903 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 [2023-08-30 15:25:44,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:44,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash 330159544, now seen corresponding path program 1 times [2023-08-30 15:25:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:44,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803965796] [2023-08-30 15:25:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803965796] [2023-08-30 15:25:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803965796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:44,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874763543] [2023-08-30 15:25:44,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:44,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:44,957 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) [2023-08-30 15:25:44,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:44,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:44,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:45,068 INFO L130 PetriNetUnfolder]: 593/1038 cut-off events. [2023-08-30 15:25:45,069 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-08-30 15:25:45,071 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. [2023-08-30 15:25:45,076 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 15:25:45,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 451 flow [2023-08-30 15:25:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 15:25:45,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-08-30 15:25:45,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 15:25:45,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 15:25:45,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:45,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 15:25:45,080 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) [2023-08-30 15:25:45,081 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) [2023-08-30 15:25:45,081 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) [2023-08-30 15:25:45,081 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 402 flow. Second operand 3 states and 221 transitions. [2023-08-30 15:25:45,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 451 flow [2023-08-30 15:25:45,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 401 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:45,089 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 323 flow [2023-08-30 15:25:45,090 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} [2023-08-30 15:25:45,090 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-08-30 15:25:45,091 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 323 flow [2023-08-30 15:25:45,091 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) [2023-08-30 15:25:45,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:45,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:25:45,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:45,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 309225381, now seen corresponding path program 1 times [2023-08-30 15:25:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81302282] [2023-08-30 15:25:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81302282] [2023-08-30 15:25:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81302282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087064922] [2023-08-30 15:25:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:45,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 15:25:45,130 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) [2023-08-30 15:25:45,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:45,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 15:25:45,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:45,239 INFO L130 PetriNetUnfolder]: 587/1071 cut-off events. [2023-08-30 15:25:45,240 INFO L131 PetriNetUnfolder]: For 1488/1488 co-relation queries the response was YES. [2023-08-30 15:25:45,242 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. [2023-08-30 15:25:45,246 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 53 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-30 15:25:45,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 547 flow [2023-08-30 15:25:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 15:25:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2023-08-30 15:25:45,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 15:25:45,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 15:25:45,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:45,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 15:25:45,249 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) [2023-08-30 15:25:45,249 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) [2023-08-30 15:25:45,250 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) [2023-08-30 15:25:45,250 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 323 flow. Second operand 3 states and 230 transitions. [2023-08-30 15:25:45,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 547 flow [2023-08-30 15:25:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 544 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:45,254 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 372 flow [2023-08-30 15:25:45,255 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} [2023-08-30 15:25:45,255 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-30 15:25:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 372 flow [2023-08-30 15:25:45,256 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) [2023-08-30 15:25:45,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:45,256 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:25:45,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 15:25:45,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:45,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash 309248762, now seen corresponding path program 2 times [2023-08-30 15:25:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:45,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496141840] [2023-08-30 15:25:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:45,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496141840] [2023-08-30 15:25:45,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496141840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:45,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763239954] [2023-08-30 15:25:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:45,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:45,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:45,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:25:45,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:25:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:25:45,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:25:45,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763239954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:45,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:25:45,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 15:25:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594218634] [2023-08-30 15:25:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:25:45,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 15:25:45,403 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) [2023-08-30 15:25:45,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:45,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 15:25:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:45,482 INFO L130 PetriNetUnfolder]: 394/729 cut-off events. [2023-08-30 15:25:45,482 INFO L131 PetriNetUnfolder]: For 1299/1322 co-relation queries the response was YES. [2023-08-30 15:25:45,483 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. [2023-08-30 15:25:45,486 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 15:25:45,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 363 flow [2023-08-30 15:25:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-08-30 15:25:45,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130023640661938 [2023-08-30 15:25:45,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-08-30 15:25:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-08-30 15:25:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:45,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-08-30 15:25:45,489 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) [2023-08-30 15:25:45,490 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) [2023-08-30 15:25:45,490 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) [2023-08-30 15:25:45,490 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 372 flow. Second operand 3 states and 217 transitions. [2023-08-30 15:25:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 363 flow [2023-08-30 15:25:45,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 344 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:25:45,493 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 276 flow [2023-08-30 15:25:45,493 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} [2023-08-30 15:25:45,494 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-08-30 15:25:45,494 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 276 flow [2023-08-30 15:25:45,494 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) [2023-08-30 15:25:45,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:45,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:25:45,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 15:25:45,699 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 [2023-08-30 15:25:45,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:45,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:45,701 INFO L85 PathProgramCache]: Analyzing trace with hash 309248728, now seen corresponding path program 2 times [2023-08-30 15:25:45,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:45,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612903925] [2023-08-30 15:25:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612903925] [2023-08-30 15:25:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612903925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628785280] [2023-08-30 15:25:45,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:45,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:45,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:45,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:25:45,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:25:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:25:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628785280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:45,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:45,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:25:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348483106] [2023-08-30 15:25:45,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:45,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 15:25:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:45,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 15:25:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:25:45,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:45,901 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) [2023-08-30 15:25:45,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:45,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:45,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:46,176 INFO L130 PetriNetUnfolder]: 892/1628 cut-off events. [2023-08-30 15:25:46,177 INFO L131 PetriNetUnfolder]: For 5161/5223 co-relation queries the response was YES. [2023-08-30 15:25:46,179 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. [2023-08-30 15:25:46,186 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 87 selfloop transitions, 67 changer transitions 0/156 dead transitions. [2023-08-30 15:25:46,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 156 transitions, 1234 flow [2023-08-30 15:25:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:25:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:25:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 950 transitions. [2023-08-30 15:25:46,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614657210401891 [2023-08-30 15:25:46,190 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 950 transitions. [2023-08-30 15:25:46,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 950 transitions. [2023-08-30 15:25:46,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:46,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 950 transitions. [2023-08-30 15:25:46,193 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) [2023-08-30 15:25:46,195 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) [2023-08-30 15:25:46,196 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) [2023-08-30 15:25:46,196 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 276 flow. Second operand 12 states and 950 transitions. [2023-08-30 15:25:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 156 transitions, 1234 flow [2023-08-30 15:25:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 156 transitions, 1233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:46,203 INFO L231 Difference]: Finished difference. Result has 59 places, 86 transitions, 1075 flow [2023-08-30 15:25:46,203 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} [2023-08-30 15:25:46,205 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2023-08-30 15:25:46,205 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 86 transitions, 1075 flow [2023-08-30 15:25:46,207 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) [2023-08-30 15:25:46,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:46,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:46,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:46,413 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 [2023-08-30 15:25:46,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:46,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2072971818, now seen corresponding path program 1 times [2023-08-30 15:25:46,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:46,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123977862] [2023-08-30 15:25:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:25:46,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123977862] [2023-08-30 15:25:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123977862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:46,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:46,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:46,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344623213] [2023-08-30 15:25:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:46,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:46,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 15:25:46,455 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) [2023-08-30 15:25:46,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:46,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 15:25:46,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:46,621 INFO L130 PetriNetUnfolder]: 790/1434 cut-off events. [2023-08-30 15:25:46,621 INFO L131 PetriNetUnfolder]: For 5865/5865 co-relation queries the response was YES. [2023-08-30 15:25:46,625 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. [2023-08-30 15:25:46,629 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 86 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-30 15:25:46,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 1204 flow [2023-08-30 15:25:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 15:25:46,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2023-08-30 15:25:46,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 15:25:46,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 15:25:46,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:46,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 15:25:46,633 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) [2023-08-30 15:25:46,634 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) [2023-08-30 15:25:46,634 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) [2023-08-30 15:25:46,634 INFO L175 Difference]: Start difference. First operand has 59 places, 86 transitions, 1075 flow. Second operand 3 states and 222 transitions. [2023-08-30 15:25:46,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 1204 flow [2023-08-30 15:25:46,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 1014 flow, removed 95 selfloop flow, removed 0 redundant places. [2023-08-30 15:25:46,660 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 711 flow [2023-08-30 15:25:46,661 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} [2023-08-30 15:25:46,662 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2023-08-30 15:25:46,662 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 711 flow [2023-08-30 15:25:46,662 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) [2023-08-30 15:25:46,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:46,663 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 15:25:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:25:46,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:46,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2097862856, now seen corresponding path program 3 times [2023-08-30 15:25:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729821304] [2023-08-30 15:25:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729821304] [2023-08-30 15:25:46,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729821304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641960915] [2023-08-30 15:25:46,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:25:46,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:46,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:46,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:46,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:25:46,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:25:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:25:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:46,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641960915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:47,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 15:25:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576826356] [2023-08-30 15:25:47,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:25:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:25:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 15:25:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:47,159 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) [2023-08-30 15:25:47,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:47,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:47,745 INFO L130 PetriNetUnfolder]: 1679/3013 cut-off events. [2023-08-30 15:25:47,745 INFO L131 PetriNetUnfolder]: For 46614/46748 co-relation queries the response was YES. [2023-08-30 15:25:47,751 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. [2023-08-30 15:25:47,758 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 103 selfloop transitions, 159 changer transitions 66/330 dead transitions. [2023-08-30 15:25:47,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 330 transitions, 2664 flow [2023-08-30 15:25:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:25:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:25:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1887 transitions. [2023-08-30 15:25:47,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576241134751773 [2023-08-30 15:25:47,764 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1887 transitions. [2023-08-30 15:25:47,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1887 transitions. [2023-08-30 15:25:47,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:47,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1887 transitions. [2023-08-30 15:25:47,768 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) [2023-08-30 15:25:47,773 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) [2023-08-30 15:25:47,774 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) [2023-08-30 15:25:47,774 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 711 flow. Second operand 24 states and 1887 transitions. [2023-08-30 15:25:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 330 transitions, 2664 flow [2023-08-30 15:25:47,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 330 transitions, 2653 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:47,791 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 2355 flow [2023-08-30 15:25:47,791 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} [2023-08-30 15:25:47,792 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 78 predicate places. [2023-08-30 15:25:47,792 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 2355 flow [2023-08-30 15:25:47,793 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) [2023-08-30 15:25:47,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:47,793 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-30 15:25:47,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:47,998 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 [2023-08-30 15:25:47,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:47,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 866752504, now seen corresponding path program 4 times [2023-08-30 15:25:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587828060] [2023-08-30 15:25:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:48,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587828060] [2023-08-30 15:25:48,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587828060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292606321] [2023-08-30 15:25:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:25:48,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:48,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:25:48,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:25:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:25:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:48,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292606321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:49,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-08-30 15:25:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059745618] [2023-08-30 15:25:49,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 15:25:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 15:25:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 15:25:49,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:49,318 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) [2023-08-30 15:25:49,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:49,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:51,294 INFO L130 PetriNetUnfolder]: 4819/8541 cut-off events. [2023-08-30 15:25:51,294 INFO L131 PetriNetUnfolder]: For 546622/546900 co-relation queries the response was YES. [2023-08-30 15:25:51,328 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. [2023-08-30 15:25:51,353 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 199 selfloop transitions, 515 changer transitions 138/854 dead transitions. [2023-08-30 15:25:51,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 854 transitions, 9652 flow [2023-08-30 15:25:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 15:25:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 15:25:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3783 transitions. [2023-08-30 15:25:51,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589539007092199 [2023-08-30 15:25:51,363 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3783 transitions. [2023-08-30 15:25:51,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3783 transitions. [2023-08-30 15:25:51,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:51,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3783 transitions. [2023-08-30 15:25:51,373 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) [2023-08-30 15:25:51,382 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) [2023-08-30 15:25:51,384 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) [2023-08-30 15:25:51,384 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 2355 flow. Second operand 48 states and 3783 transitions. [2023-08-30 15:25:51,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 854 transitions, 9652 flow [2023-08-30 15:25:51,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 854 transitions, 7260 flow, removed 1155 selfloop flow, removed 5 redundant places. [2023-08-30 15:25:51,513 INFO L231 Difference]: Finished difference. Result has 192 places, 532 transitions, 7026 flow [2023-08-30 15:25:51,513 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} [2023-08-30 15:25:51,514 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 166 predicate places. [2023-08-30 15:25:51,514 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 532 transitions, 7026 flow [2023-08-30 15:25:51,515 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) [2023-08-30 15:25:51,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:51,516 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-08-30 15:25:51,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:51,722 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 [2023-08-30 15:25:51,723 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:25:51,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -971433608, now seen corresponding path program 5 times [2023-08-30 15:25:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:51,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27870462] [2023-08-30 15:25:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:53,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27870462] [2023-08-30 15:25:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27870462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701192998] [2023-08-30 15:25:53,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:25:53,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:53,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:53,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:25:53,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-30 15:25:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 15:25:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:53,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:55,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701192998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:55,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:55,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-08-30 15:25:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585869570] [2023-08-30 15:25:55,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:55,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-08-30 15:25:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-08-30 15:25:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-08-30 15:25:55,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:25:55,949 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) [2023-08-30 15:25:55,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:55,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:25:55,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:04,940 INFO L130 PetriNetUnfolder]: 15735/27701 cut-off events. [2023-08-30 15:26:04,940 INFO L131 PetriNetUnfolder]: For 4716051/4716617 co-relation queries the response was YES. [2023-08-30 15:26:05,100 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. [2023-08-30 15:26:05,171 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 391 selfloop transitions, 1807 changer transitions 282/2482 dead transitions. [2023-08-30 15:26:05,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 2482 transitions, 31319 flow [2023-08-30 15:26:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 15:26:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 15:26:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7575 transitions. [2023-08-30 15:26:05,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596187943262412 [2023-08-30 15:26:05,186 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7575 transitions. [2023-08-30 15:26:05,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7575 transitions. [2023-08-30 15:26:05,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:05,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7575 transitions. [2023-08-30 15:26:05,217 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) [2023-08-30 15:26:05,237 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) [2023-08-30 15:26:05,240 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) [2023-08-30 15:26:05,241 INFO L175 Difference]: Start difference. First operand has 192 places, 532 transitions, 7026 flow. Second operand 96 states and 7575 transitions. [2023-08-30 15:26:05,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 2482 transitions, 31319 flow [2023-08-30 15:26:06,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 2482 transitions, 22371 flow, removed 4347 selfloop flow, removed 11 redundant places. [2023-08-30 15:26:06,270 INFO L231 Difference]: Finished difference. Result has 370 places, 1824 transitions, 23425 flow [2023-08-30 15:26:06,271 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} [2023-08-30 15:26:06,271 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 344 predicate places. [2023-08-30 15:26:06,271 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1824 transitions, 23425 flow [2023-08-30 15:26:06,273 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) [2023-08-30 15:26:06,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:06,273 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-08-30 15:26:06,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 15:26:06,479 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 [2023-08-30 15:26:06,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:26:06,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1638753160, now seen corresponding path program 6 times [2023-08-30 15:26:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:06,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758675119] [2023-08-30 15:26:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:11,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:11,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758675119] [2023-08-30 15:26:11,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758675119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:11,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551378433] [2023-08-30 15:26:11,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:26:11,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:11,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:11,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:26:11,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-08-30 15:26:11,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 15:26:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:11,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:19,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551378433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:19,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:19,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-08-30 15:26:19,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71782460] [2023-08-30 15:26:19,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:19,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-08-30 15:26:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-08-30 15:26:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-08-30 15:26:20,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:26:20,156 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) [2023-08-30 15:26:20,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:20,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:26:20,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:33,730 INFO L130 PetriNetUnfolder]: 56027/98317 cut-off events. [2023-08-30 15:27:33,730 INFO L131 PetriNetUnfolder]: For 39906259/39907401 co-relation queries the response was YES. [2023-08-30 15:27:36,413 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. [2023-08-30 15:27:36,679 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 775 selfloop transitions, 6699 changer transitions 570/8046 dead transitions. [2023-08-30 15:27:36,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 8046 transitions, 110518 flow [2023-08-30 15:27:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-08-30 15:27:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-08-30 15:27:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 15159 transitions. [2023-08-30 15:27:36,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599512411347518 [2023-08-30 15:27:36,707 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 15159 transitions. [2023-08-30 15:27:36,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 15159 transitions. [2023-08-30 15:27:36,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:36,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 15159 transitions. [2023-08-30 15:27:36,735 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) [2023-08-30 15:27:36,775 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) [2023-08-30 15:27:36,785 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) [2023-08-30 15:27:36,785 INFO L175 Difference]: Start difference. First operand has 370 places, 1824 transitions, 23425 flow. Second operand 192 states and 15159 transitions. [2023-08-30 15:27:36,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 8046 transitions, 110518 flow [2023-08-30 15:27:45,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 8046 transitions, 76066 flow, removed 16779 selfloop flow, removed 23 redundant places. [2023-08-30 15:27:46,027 INFO L231 Difference]: Finished difference. Result has 728 places, 6716 transitions, 84312 flow [2023-08-30 15:27:46,029 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} [2023-08-30 15:27:46,029 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 702 predicate places. [2023-08-30 15:27:46,029 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 6716 transitions, 84312 flow [2023-08-30 15:27:46,032 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) [2023-08-30 15:27:46,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:46,033 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-08-30 15:27:46,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 15:27:46,239 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 [2023-08-30 15:27:46,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 15:27:46,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1445962360, now seen corresponding path program 7 times [2023-08-30 15:27:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537937450] [2023-08-30 15:27:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:02,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:28:02,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537937450] [2023-08-30 15:28:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537937450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:28:02,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098652340] [2023-08-30 15:28:02,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:28:02,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:28:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:28:02,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:28:02,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:28:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:28:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 193 conjunts are in the unsatisfiable core [2023-08-30 15:28:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:28:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:02,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:28:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:28:34,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098652340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:28:34,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:28:34,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-08-30 15:28:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10360445] [2023-08-30 15:28:34,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:28:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-08-30 15:28:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:28:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-08-30 15:28:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-08-30 15:28:38,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 15:28:38,131 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) [2023-08-30 15:28:38,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:28:38,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 15:28:38,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand