./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:32:52,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:32:52,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:32:52,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:32:52,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:32:52,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:32:52,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:32:52,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:32:52,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:32:52,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:32:52,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:32:52,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:32:52,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:32:52,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:32:52,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:32:52,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:32:52,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:32:52,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:32:52,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:32:52,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:32:52,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:32:52,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:32:52,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:32:52,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:32:52,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:32:52,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:32:52,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:32:52,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:32:52,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:32:52,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:32:52,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:32:52,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:32:52,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:32:52,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:32:52,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:32:52,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:32:52,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:32:52,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:32:52,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:32:52,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:32:52,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:32:52,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:32:52,880 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:32:52,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:32:52,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:32:52,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:32:52,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:32:52,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:32:52,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:32:52,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:32:52,884 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:32:52,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:32:52,885 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:32:52,885 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:32:52,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:32:52,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:32:52,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:32:52,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:32:52,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:32:52,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:32:52,886 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:32:52,886 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:32:52,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:32:52,887 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:32:52,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:32:52,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:32:52,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:32:52,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:32:52,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:32:52,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:32:52,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:32:52,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:32:52,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:32:52,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:32:52,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:32:52,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:32:52,890 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:32:52,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:32:52,890 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:32:52,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:32:53,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:32:53,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:32:53,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:32:53,212 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:32:53,212 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:32:53,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 11:32:54,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:32:54,561 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:32:54,562 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 11:32:54,572 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aee39207/7973281cef934c68a9cbfda71d5c26e0/FLAGcf07f960f [2023-08-30 11:32:54,584 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aee39207/7973281cef934c68a9cbfda71d5c26e0 [2023-08-30 11:32:54,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:32:54,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:32:54,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:32:54,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:32:54,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:32:54,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c14623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54, skipping insertion in model container [2023-08-30 11:32:54,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:32:54,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:32:54,735 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 11:32:54,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:32:54,743 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:32:54,759 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 11:32:54,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:32:54,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:32:54,766 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:32:54,772 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:32:54,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54 WrapperNode [2023-08-30 11:32:54,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:32:54,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:32:54,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:32:54,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:32:54,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,813 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-08-30 11:32:54,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:32:54,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:32:54,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:32:54,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:32:54,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:32:54,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:32:54,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:32:54,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:32:54,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (1/1) ... [2023-08-30 11:32:54,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:32:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:54,893 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 11:32:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:32:54,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:32:54,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:32:54,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:32:54,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:32:54,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:32:54,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:32:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:32:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:32:54,921 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 11:32:54,934 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 11:32:55,036 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:32:55,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:32:55,236 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:32:55,318 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:32:55,319 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 11:32:55,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:32:55 BoogieIcfgContainer [2023-08-30 11:32:55,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:32:55,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:32:55,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:32:55,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:32:55,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:32:54" (1/3) ... [2023-08-30 11:32:55,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6bdf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:32:55, skipping insertion in model container [2023-08-30 11:32:55,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:54" (2/3) ... [2023-08-30 11:32:55,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a6bdf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:32:55, skipping insertion in model container [2023-08-30 11:32:55,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:32:55" (3/3) ... [2023-08-30 11:32:55,329 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-30 11:32:55,339 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:32:55,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:32:55,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 11:32:55,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:32:55,445 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:32:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 83 transitions, 182 flow [2023-08-30 11:32:55,509 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-08-30 11:32:55,510 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:32:55,514 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 11:32:55,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 83 transitions, 182 flow [2023-08-30 11:32:55,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 65 transitions, 139 flow [2023-08-30 11:32:55,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:32:55,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 65 transitions, 139 flow [2023-08-30 11:32:55,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 65 transitions, 139 flow [2023-08-30 11:32:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 139 flow [2023-08-30 11:32:55,550 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2023-08-30 11:32:55,550 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:32:55,551 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 11:32:55,553 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-30 11:32:57,659 INFO L134 LiptonReduction]: Checked pairs total: 1068 [2023-08-30 11:32:57,660 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 11:32:57,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:32:57,678 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;@2fe3823, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:32:57,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-30 11:32:57,681 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 11:32:57,682 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:32:57,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:57,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:57,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:32:57,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 10650263, now seen corresponding path program 1 times [2023-08-30 11:32:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:57,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035692456] [2023-08-30 11:32:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:57,924 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 11:32:57,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035692456] [2023-08-30 11:32:57,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035692456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:57,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:57,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:57,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20322316] [2023-08-30 11:32:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:57,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:57,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:57,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:32:57,975 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 11:32:57,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:57,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:32:57,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:58,105 INFO L130 PetriNetUnfolder]: 215/331 cut-off events. [2023-08-30 11:32:58,106 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 11:32:58,108 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 11:32:58,113 INFO L137 encePairwiseOnDemand]: 130/141 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2023-08-30 11:32:58,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2023-08-30 11:32:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-30 11:32:58,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-08-30 11:32:58,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-30 11:32:58,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-30 11:32:58,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:58,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-30 11:32:58,139 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 11:32:58,144 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 11:32:58,145 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 11:32:58,146 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 240 transitions. [2023-08-30 11:32:58,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2023-08-30 11:32:58,149 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 11:32:58,150 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2023-08-30 11:32:58,152 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 11:32:58,156 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-30 11:32:58,156 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2023-08-30 11:32:58,157 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 11:32:58,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:58,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:58,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:32:58,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:32:58,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 330159579, now seen corresponding path program 1 times [2023-08-30 11:32:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:58,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639384328] [2023-08-30 11:32:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:58,275 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 11:32:58,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:58,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639384328] [2023-08-30 11:32:58,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639384328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:58,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085826371] [2023-08-30 11:32:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:58,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:58,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:58,285 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 11:32:58,314 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 11:32:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:58,410 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 11:32:58,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:58,427 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 11:32:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085826371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:58,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:58,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:32:58,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992779973] [2023-08-30 11:32:58,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:58,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:58,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:58,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 11:32:58,462 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 11:32:58,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:58,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 11:32:58,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:58,670 INFO L130 PetriNetUnfolder]: 636/960 cut-off events. [2023-08-30 11:32:58,671 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-08-30 11:32:58,674 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 11:32:58,681 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 68 selfloop transitions, 9 changer transitions 3/81 dead transitions. [2023-08-30 11:32:58,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 81 transitions, 420 flow [2023-08-30 11:32:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:32:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:32:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2023-08-30 11:32:58,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612968591691996 [2023-08-30 11:32:58,687 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2023-08-30 11:32:58,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2023-08-30 11:32:58,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:58,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2023-08-30 11:32:58,691 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 11:32:58,694 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 11:32:58,695 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 11:32:58,695 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 7 states and 554 transitions. [2023-08-30 11:32:58,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 81 transitions, 420 flow [2023-08-30 11:32:58,697 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 11:32:58,699 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 127 flow [2023-08-30 11:32:58,699 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 11:32:58,700 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-30 11:32:58,700 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 127 flow [2023-08-30 11:32:58,700 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 11:32:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:58,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 11:32:58,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 11:32:58,906 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 11:32:58,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:32:58,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1645012697, now seen corresponding path program 1 times [2023-08-30 11:32:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:58,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218862628] [2023-08-30 11:32:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:58,999 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 11:32:58,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:58,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218862628] [2023-08-30 11:32:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218862628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046868353] [2023-08-30 11:32:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:59,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:59,003 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 11:32:59,004 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 11:32:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:59,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:32:59,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:59,056 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 11:32:59,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:32:59,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046868353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:59,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:32:59,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-30 11:32:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040526482] [2023-08-30 11:32:59,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:59,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:32:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:32:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:32:59,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 11:32:59,070 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 11:32:59,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:59,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 11:32:59,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:59,225 INFO L130 PetriNetUnfolder]: 577/887 cut-off events. [2023-08-30 11:32:59,226 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-30 11:32:59,227 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 11:32:59,231 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 40 selfloop transitions, 3 changer transitions 3/47 dead transitions. [2023-08-30 11:32:59,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 260 flow [2023-08-30 11:32:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:32:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:32:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-08-30 11:32:59,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404255319148936 [2023-08-30 11:32:59,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-08-30 11:32:59,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-08-30 11:32:59,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:59,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-08-30 11:32:59,235 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 11:32:59,236 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 11:32:59,237 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 11:32:59,237 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 127 flow. Second operand 5 states and 381 transitions. [2023-08-30 11:32:59,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 260 flow [2023-08-30 11:32:59,241 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 11:32:59,242 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 104 flow [2023-08-30 11:32:59,242 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 11:32:59,245 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-30 11:32:59,248 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 104 flow [2023-08-30 11:32:59,249 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 11:32:59,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:59,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:59,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:32:59,454 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 11:32:59,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:32:59,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 330159545, now seen corresponding path program 1 times [2023-08-30 11:32:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156362368] [2023-08-30 11:32:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:59,524 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 11:32:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156362368] [2023-08-30 11:32:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156362368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674790025] [2023-08-30 11:32:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:59,529 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 11:32:59,556 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 11:32:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:59,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:59,593 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 11:32:59,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:59,612 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 11:32:59,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674790025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:59,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:32:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251995924] [2023-08-30 11:32:59,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:59,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:32:59,623 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 11:32:59,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:59,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:32:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:59,810 INFO L130 PetriNetUnfolder]: 681/1169 cut-off events. [2023-08-30 11:32:59,811 INFO L131 PetriNetUnfolder]: For 437/437 co-relation queries the response was YES. [2023-08-30 11:32:59,813 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 11:32:59,817 INFO L137 encePairwiseOnDemand]: 132/141 looper letters, 50 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2023-08-30 11:32:59,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 81 transitions, 499 flow [2023-08-30 11:32:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:32:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:32:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 561 transitions. [2023-08-30 11:32:59,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683890577507599 [2023-08-30 11:32:59,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 561 transitions. [2023-08-30 11:32:59,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 561 transitions. [2023-08-30 11:32:59,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:59,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 561 transitions. [2023-08-30 11:32:59,821 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 11:32:59,824 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 11:32:59,824 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 11:32:59,824 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 104 flow. Second operand 7 states and 561 transitions. [2023-08-30 11:32:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 81 transitions, 499 flow [2023-08-30 11:32:59,828 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 11:32:59,829 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 402 flow [2023-08-30 11:32:59,829 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 11:32:59,830 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-30 11:32:59,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 402 flow [2023-08-30 11:32:59,831 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 11:32:59,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:59,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:59,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:00,036 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 11:33:00,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:00,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 330159544, now seen corresponding path program 1 times [2023-08-30 11:33:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:00,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354742828] [2023-08-30 11:33:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:00,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:00,078 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 11:33:00,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:00,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354742828] [2023-08-30 11:33:00,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354742828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:33:00,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:33:00,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:33:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712224936] [2023-08-30 11:33:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:33:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:33:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:33:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:33:00,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:00,088 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 11:33:00,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:00,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:00,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:00,210 INFO L130 PetriNetUnfolder]: 593/1038 cut-off events. [2023-08-30 11:33:00,210 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-08-30 11:33:00,212 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 11:33:00,216 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 39 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 11:33:00,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 451 flow [2023-08-30 11:33:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:33:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:33:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 11:33:00,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-08-30 11:33:00,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 11:33:00,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 11:33:00,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:00,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 11:33:00,219 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 11:33:00,220 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 11:33:00,220 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 11:33:00,220 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 402 flow. Second operand 3 states and 221 transitions. [2023-08-30 11:33:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 451 flow [2023-08-30 11:33:00,226 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 11:33:00,227 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 323 flow [2023-08-30 11:33:00,227 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 11:33:00,228 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-08-30 11:33:00,228 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 323 flow [2023-08-30 11:33:00,228 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 11:33:00,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:00,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:33:00,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:00,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash 309225381, now seen corresponding path program 1 times [2023-08-30 11:33:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008590149] [2023-08-30 11:33:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:00,258 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 11:33:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008590149] [2023-08-30 11:33:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008590149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:33:00,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:33:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:33:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860028389] [2023-08-30 11:33:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:33:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:33:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:33:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:33:00,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 11:33:00,265 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 11:33:00,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:00,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 11:33:00,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:00,380 INFO L130 PetriNetUnfolder]: 587/1071 cut-off events. [2023-08-30 11:33:00,380 INFO L131 PetriNetUnfolder]: For 1488/1488 co-relation queries the response was YES. [2023-08-30 11:33:00,382 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 11:33:00,386 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 53 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-30 11:33:00,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 547 flow [2023-08-30 11:33:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:33:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:33:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 11:33:00,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2023-08-30 11:33:00,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 11:33:00,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 11:33:00,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:00,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 11:33:00,389 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 11:33:00,389 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 11:33:00,390 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 11:33:00,390 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 323 flow. Second operand 3 states and 230 transitions. [2023-08-30 11:33:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 547 flow [2023-08-30 11:33:00,393 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 11:33:00,394 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 372 flow [2023-08-30 11:33:00,394 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 11:33:00,395 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-30 11:33:00,395 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 372 flow [2023-08-30 11:33:00,395 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 11:33:00,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:00,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:33:00,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:33:00,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:00,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash 309248762, now seen corresponding path program 2 times [2023-08-30 11:33:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:00,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290717175] [2023-08-30 11:33:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:00,457 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 11:33:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290717175] [2023-08-30 11:33:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290717175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059190521] [2023-08-30 11:33:00,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:33:00,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:00,459 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 11:33:00,484 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 11:33:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:33:00,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:33:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:00,554 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 11:33:00,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:33:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059190521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:33:00,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:33:00,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:33:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432706953] [2023-08-30 11:33:00,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:33:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:33:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:33:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:33:00,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 11:33:00,563 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 11:33:00,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:00,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 11:33:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:00,677 INFO L130 PetriNetUnfolder]: 394/729 cut-off events. [2023-08-30 11:33:00,677 INFO L131 PetriNetUnfolder]: For 1299/1322 co-relation queries the response was YES. [2023-08-30 11:33:00,679 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 11:33:00,682 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 11:33:00,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 363 flow [2023-08-30 11:33:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:33:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:33:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-08-30 11:33:00,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130023640661938 [2023-08-30 11:33:00,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-08-30 11:33:00,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-08-30 11:33:00,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-08-30 11:33:00,684 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 11:33:00,685 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 11:33:00,685 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 11:33:00,685 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 372 flow. Second operand 3 states and 217 transitions. [2023-08-30 11:33:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 363 flow [2023-08-30 11:33:00,687 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 11:33:00,688 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 276 flow [2023-08-30 11:33:00,688 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 11:33:00,689 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-08-30 11:33:00,689 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 276 flow [2023-08-30 11:33:00,689 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 11:33:00,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:00,689 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:33:00,696 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 11:33:00,894 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 11:33:00,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:00,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 309248728, now seen corresponding path program 2 times [2023-08-30 11:33:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:00,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458615580] [2023-08-30 11:33:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:00,969 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 11:33:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458615580] [2023-08-30 11:33:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458615580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299551584] [2023-08-30 11:33:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:33:00,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:00,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:00,974 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 11:33:00,997 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 11:33:01,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:33:01,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:33:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:01,047 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 11:33:01,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:01,104 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 11:33:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299551584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:01,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 11:33:01,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743104737] [2023-08-30 11:33:01,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:33:01,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:33:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:33:01,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:01,122 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 11:33:01,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:01,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:01,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:01,396 INFO L130 PetriNetUnfolder]: 892/1628 cut-off events. [2023-08-30 11:33:01,397 INFO L131 PetriNetUnfolder]: For 5161/5223 co-relation queries the response was YES. [2023-08-30 11:33:01,399 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 11:33:01,405 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 87 selfloop transitions, 67 changer transitions 0/156 dead transitions. [2023-08-30 11:33:01,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 156 transitions, 1234 flow [2023-08-30 11:33:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:33:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:33:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 950 transitions. [2023-08-30 11:33:01,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614657210401891 [2023-08-30 11:33:01,408 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 950 transitions. [2023-08-30 11:33:01,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 950 transitions. [2023-08-30 11:33:01,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:01,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 950 transitions. [2023-08-30 11:33:01,411 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 11:33:01,413 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 11:33:01,414 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 11:33:01,414 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 276 flow. Second operand 12 states and 950 transitions. [2023-08-30 11:33:01,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 156 transitions, 1234 flow [2023-08-30 11:33:01,417 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 11:33:01,419 INFO L231 Difference]: Finished difference. Result has 59 places, 86 transitions, 1075 flow [2023-08-30 11:33:01,420 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 11:33:01,420 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2023-08-30 11:33:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 86 transitions, 1075 flow [2023-08-30 11:33:01,421 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 11:33:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:01,429 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 11:33:01,626 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 11:33:01,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:01,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2072971818, now seen corresponding path program 1 times [2023-08-30 11:33:01,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:01,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709542286] [2023-08-30 11:33:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:01,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:01,655 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 11:33:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709542286] [2023-08-30 11:33:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709542286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:33:01,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:33:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:33:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126609471] [2023-08-30 11:33:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:33:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:33:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:33:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:33:01,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 141 [2023-08-30 11:33:01,663 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 11:33:01,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:01,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 141 [2023-08-30 11:33:01,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:01,818 INFO L130 PetriNetUnfolder]: 790/1434 cut-off events. [2023-08-30 11:33:01,819 INFO L131 PetriNetUnfolder]: For 5865/5865 co-relation queries the response was YES. [2023-08-30 11:33:01,822 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 11:33:01,826 INFO L137 encePairwiseOnDemand]: 139/141 looper letters, 86 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-30 11:33:01,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 1204 flow [2023-08-30 11:33:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:33:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:33:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 11:33:01,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2023-08-30 11:33:01,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 11:33:01,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 11:33:01,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:01,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 11:33:01,828 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 11:33:01,829 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 11:33:01,829 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 11:33:01,829 INFO L175 Difference]: Start difference. First operand has 59 places, 86 transitions, 1075 flow. Second operand 3 states and 222 transitions. [2023-08-30 11:33:01,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 1204 flow [2023-08-30 11:33:01,846 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 11:33:01,847 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 711 flow [2023-08-30 11:33:01,847 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 11:33:01,848 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2023-08-30 11:33:01,848 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 711 flow [2023-08-30 11:33:01,848 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 11:33:01,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:01,848 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 11:33:01,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:33:01,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:01,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2097862856, now seen corresponding path program 3 times [2023-08-30 11:33:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:01,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034764416] [2023-08-30 11:33:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:01,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:01,976 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 11:33:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034764416] [2023-08-30 11:33:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034764416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008518618] [2023-08-30 11:33:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:33:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:01,978 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 11:33:02,004 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 11:33:02,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:33:02,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:33:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:02,082 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 11:33:02,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:02,249 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 11:33:02,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008518618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:02,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:02,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 11:33:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466819089] [2023-08-30 11:33:02,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:02,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:33:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:33:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 11:33:02,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:02,273 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 11:33:02,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:02,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:02,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:02,844 INFO L130 PetriNetUnfolder]: 1679/3013 cut-off events. [2023-08-30 11:33:02,844 INFO L131 PetriNetUnfolder]: For 46614/46748 co-relation queries the response was YES. [2023-08-30 11:33:02,852 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 11:33:02,866 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 103 selfloop transitions, 159 changer transitions 66/330 dead transitions. [2023-08-30 11:33:02,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 330 transitions, 2664 flow [2023-08-30 11:33:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:33:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:33:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1887 transitions. [2023-08-30 11:33:02,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576241134751773 [2023-08-30 11:33:02,904 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1887 transitions. [2023-08-30 11:33:02,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1887 transitions. [2023-08-30 11:33:02,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:02,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1887 transitions. [2023-08-30 11:33:02,909 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 11:33:02,913 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 11:33:02,915 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 11:33:02,916 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 711 flow. Second operand 24 states and 1887 transitions. [2023-08-30 11:33:02,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 330 transitions, 2664 flow [2023-08-30 11:33:02,938 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 11:33:02,943 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 2355 flow [2023-08-30 11:33:02,944 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 11:33:02,945 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 78 predicate places. [2023-08-30 11:33:02,945 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 2355 flow [2023-08-30 11:33:02,946 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 11:33:02,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:02,946 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-30 11:33:02,959 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 11:33:03,151 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 11:33:03,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:03,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash 866752504, now seen corresponding path program 4 times [2023-08-30 11:33:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231834171] [2023-08-30 11:33:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:03,567 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 11:33:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231834171] [2023-08-30 11:33:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231834171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410776370] [2023-08-30 11:33:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:33:03,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:03,569 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 11:33:03,596 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 11:33:03,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:33:03,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:33:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:03,714 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 11:33:03,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:04,399 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 11:33:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410776370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:04,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:04,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-08-30 11:33:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834236002] [2023-08-30 11:33:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:04,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:33:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:33:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:33:04,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:04,462 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 11:33:04,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:04,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:06,634 INFO L130 PetriNetUnfolder]: 4819/8541 cut-off events. [2023-08-30 11:33:06,634 INFO L131 PetriNetUnfolder]: For 546622/546900 co-relation queries the response was YES. [2023-08-30 11:33:06,666 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 11:33:06,693 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 199 selfloop transitions, 515 changer transitions 138/854 dead transitions. [2023-08-30 11:33:06,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 854 transitions, 9652 flow [2023-08-30 11:33:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 11:33:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 11:33:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3783 transitions. [2023-08-30 11:33:06,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589539007092199 [2023-08-30 11:33:06,706 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3783 transitions. [2023-08-30 11:33:06,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3783 transitions. [2023-08-30 11:33:06,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:06,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3783 transitions. [2023-08-30 11:33:06,715 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 11:33:06,725 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 11:33:06,727 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 11:33:06,727 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 2355 flow. Second operand 48 states and 3783 transitions. [2023-08-30 11:33:06,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 854 transitions, 9652 flow [2023-08-30 11:33:06,856 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 11:33:06,863 INFO L231 Difference]: Finished difference. Result has 192 places, 532 transitions, 7026 flow [2023-08-30 11:33:06,864 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 11:33:06,864 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 166 predicate places. [2023-08-30 11:33:06,864 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 532 transitions, 7026 flow [2023-08-30 11:33:06,865 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 11:33:06,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:06,865 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-08-30 11:33:06,872 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 11:33:07,065 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 11:33:07,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:07,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash -971433608, now seen corresponding path program 5 times [2023-08-30 11:33:07,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:07,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986895891] [2023-08-30 11:33:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:08,652 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 11:33:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986895891] [2023-08-30 11:33:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986895891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:08,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710428065] [2023-08-30 11:33:08,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:33:08,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:08,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:08,655 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 11:33:08,657 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 11:33:08,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-30 11:33:08,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:33:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:08,920 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 11:33:08,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:11,450 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 11:33:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710428065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:11,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:11,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-08-30 11:33:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650780398] [2023-08-30 11:33:11,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:11,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-08-30 11:33:11,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-08-30 11:33:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-08-30 11:33:11,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:11,605 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 11:33:11,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:11,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:21,046 INFO L130 PetriNetUnfolder]: 15735/27701 cut-off events. [2023-08-30 11:33:21,046 INFO L131 PetriNetUnfolder]: For 4716051/4716617 co-relation queries the response was YES. [2023-08-30 11:33:21,292 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 11:33:21,356 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 391 selfloop transitions, 1807 changer transitions 282/2482 dead transitions. [2023-08-30 11:33:21,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 2482 transitions, 31319 flow [2023-08-30 11:33:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 11:33:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 11:33:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7575 transitions. [2023-08-30 11:33:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596187943262412 [2023-08-30 11:33:21,371 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7575 transitions. [2023-08-30 11:33:21,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7575 transitions. [2023-08-30 11:33:21,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:21,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7575 transitions. [2023-08-30 11:33:21,401 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 11:33:21,419 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 11:33:21,422 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 11:33:21,422 INFO L175 Difference]: Start difference. First operand has 192 places, 532 transitions, 7026 flow. Second operand 96 states and 7575 transitions. [2023-08-30 11:33:21,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 2482 transitions, 31319 flow [2023-08-30 11:33:22,665 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 11:33:22,687 INFO L231 Difference]: Finished difference. Result has 370 places, 1824 transitions, 23425 flow [2023-08-30 11:33:22,688 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 11:33:22,688 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 344 predicate places. [2023-08-30 11:33:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1824 transitions, 23425 flow [2023-08-30 11:33:22,690 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 11:33:22,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:22,691 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-08-30 11:33:22,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:33:22,896 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 11:33:22,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:33:22,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1638753160, now seen corresponding path program 6 times [2023-08-30 11:33:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935997349] [2023-08-30 11:33:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:27,870 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 11:33:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935997349] [2023-08-30 11:33:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935997349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127745061] [2023-08-30 11:33:27,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:33:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:27,873 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 11:33:27,876 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 11:33:28,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-08-30 11:33:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 11:33:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:28,299 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 11:33:28,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:36,803 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 11:33:36,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127745061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:36,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:36,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-08-30 11:33:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870549707] [2023-08-30 11:33:36,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:36,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-08-30 11:33:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-08-30 11:33:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-08-30 11:33:37,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:33:37,259 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 11:33:37,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:37,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:33:37,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:55,723 INFO L130 PetriNetUnfolder]: 56027/98317 cut-off events. [2023-08-30 11:34:55,724 INFO L131 PetriNetUnfolder]: For 39906259/39907401 co-relation queries the response was YES. [2023-08-30 11:34:58,336 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 11:34:58,585 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 775 selfloop transitions, 6699 changer transitions 570/8046 dead transitions. [2023-08-30 11:34:58,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 8046 transitions, 110518 flow [2023-08-30 11:34:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-08-30 11:34:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-08-30 11:34:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 15159 transitions. [2023-08-30 11:34:58,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599512411347518 [2023-08-30 11:34:58,612 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 15159 transitions. [2023-08-30 11:34:58,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 15159 transitions. [2023-08-30 11:34:58,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:58,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 15159 transitions. [2023-08-30 11:34:58,646 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 11:34:58,681 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 11:34:58,688 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 11:34:58,688 INFO L175 Difference]: Start difference. First operand has 370 places, 1824 transitions, 23425 flow. Second operand 192 states and 15159 transitions. [2023-08-30 11:34:58,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 8046 transitions, 110518 flow [2023-08-30 11:35:08,731 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 11:35:08,804 INFO L231 Difference]: Finished difference. Result has 728 places, 6716 transitions, 84312 flow [2023-08-30 11:35:08,805 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 11:35:08,806 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 702 predicate places. [2023-08-30 11:35:08,806 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 6716 transitions, 84312 flow [2023-08-30 11:35:08,808 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 11:35:08,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:08,809 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-08-30 11:35:08,820 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 11:35:09,014 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 11:35:09,015 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-30 11:35:09,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1445962360, now seen corresponding path program 7 times [2023-08-30 11:35:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:09,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430337908] [2023-08-30 11:35:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:25,309 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 11:35:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430337908] [2023-08-30 11:35:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430337908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022692559] [2023-08-30 11:35:25,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:35:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:25,311 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 11:35:25,313 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 11:35:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 193 conjunts are in the unsatisfiable core [2023-08-30 11:35:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:25,971 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 11:35:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:35:58,450 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 11:35:58,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022692559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:35:58,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:35:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-08-30 11:35:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199656818] [2023-08-30 11:35:58,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:35:58,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-08-30 11:35:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:35:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-08-30 11:35:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-08-30 11:36:01,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 141 [2023-08-30 11:36:01,550 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 11:36:01,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:01,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 141 [2023-08-30 11:36:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15