./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:03:35,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:03:35,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:03:35,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:03:35,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:03:35,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:03:35,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:03:35,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:03:35,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:03:35,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:03:35,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:03:35,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:03:35,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:03:35,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:03:35,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:03:35,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:03:35,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:03:35,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:03:35,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:03:35,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:03:35,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:03:35,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:03:35,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:03:35,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:03:35,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:03:35,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:03:35,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:03:35,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:03:35,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:03:35,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:03:35,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:03:35,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:03:35,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:03:35,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:03:35,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:03:35,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:03:35,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:03:35,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:03:35,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:03:35,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:03:35,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:03:36,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:03:36,027 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:03:36,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:03:36,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:03:36,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:03:36,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:03:36,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:03:36,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:03:36,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:03:36,030 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:03:36,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:03:36,031 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:03:36,031 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:03:36,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:03:36,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:03:36,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:03:36,032 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:03:36,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:03:36,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:03:36,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:03:36,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:03:36,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:03:36,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:03:36,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:03:36,035 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:03:36,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:03:36,035 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:03:36,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:03:36,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:03:36,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:03:36,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:03:36,313 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:03:36,313 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:03:36,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 08:03:37,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:03:37,664 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:03:37,665 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-09-01 08:03:37,673 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b195be210/3652c75a57fb4f079bcd649b5459f4e7/FLAG03f7a8a9d [2023-09-01 08:03:37,704 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b195be210/3652c75a57fb4f079bcd649b5459f4e7 [2023-09-01 08:03:37,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:03:37,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:03:37,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:03:37,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:03:37,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:03:37,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a91762b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37, skipping insertion in model container [2023-09-01 08:03:37,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:03:37,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:03:37,876 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-channel-sum.wvr.c[2947,2960] [2023-09-01 08:03:37,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:03:37,884 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:03:37,897 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-channel-sum.wvr.c[2947,2960] [2023-09-01 08:03:37,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:03:37,904 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:03:37,904 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:03:37,908 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:03:37,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37 WrapperNode [2023-09-01 08:03:37,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:03:37,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:03:37,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:03:37,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:03:37,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,937 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 165 [2023-09-01 08:03:37,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:03:37,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:03:37,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:03:37,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:03:37,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:03:37,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:03:37,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:03:37,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:03:37,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (1/1) ... [2023-09-01 08:03:37,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:03:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:38,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 08:03:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 08:03:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:03:38,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:03:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:03:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:03:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:03:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:03:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:03:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:03:38,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:03:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:03:38,074 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:03:38,157 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:03:38,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:03:38,488 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:03:38,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:03:38,572 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:03:38,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:03:38 BoogieIcfgContainer [2023-09-01 08:03:38,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:03:38,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:03:38,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:03:38,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:03:38,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:03:37" (1/3) ... [2023-09-01 08:03:38,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c68e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:03:38, skipping insertion in model container [2023-09-01 08:03:38,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:03:37" (2/3) ... [2023-09-01 08:03:38,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c68e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:03:38, skipping insertion in model container [2023-09-01 08:03:38,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:03:38" (3/3) ... [2023-09-01 08:03:38,582 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-09-01 08:03:38,588 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:03:38,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:03:38,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:03:38,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:03:38,673 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:03:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 149 transitions, 314 flow [2023-09-01 08:03:38,780 INFO L130 PetriNetUnfolder]: 11/147 cut-off events. [2023-09-01 08:03:38,780 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:03:38,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 11/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 08:03:38,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 149 transitions, 314 flow [2023-09-01 08:03:38,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 131 transitions, 271 flow [2023-09-01 08:03:38,794 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:03:38,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 131 transitions, 271 flow [2023-09-01 08:03:38,806 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 131 transitions, 271 flow [2023-09-01 08:03:38,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 271 flow [2023-09-01 08:03:38,847 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2023-09-01 08:03:38,847 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:03:38,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 131 events. 10/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-09-01 08:03:38,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-09-01 08:03:43,339 INFO L134 LiptonReduction]: Checked pairs total: 2520 [2023-09-01 08:03:43,339 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-09-01 08:03:43,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:03:43,370 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;@779420e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:03:43,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-09-01 08:03:43,372 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:03:43,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:03:43,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:43,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:03:43,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:43,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 21084, now seen corresponding path program 1 times [2023-09-01 08:03:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665134773] [2023-09-01 08:03:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:43,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:43,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665134773] [2023-09-01 08:03:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665134773] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:43,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:03:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:03:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075636246] [2023-09-01 08:03:43,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:03:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:03:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:03:43,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-09-01 08:03:43,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:43,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:43,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-09-01 08:03:43,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:43,821 INFO L130 PetriNetUnfolder]: 383/577 cut-off events. [2023-09-01 08:03:43,822 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 08:03:43,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 577 events. 383/577 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2480 event pairs, 178 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 523. Up to 284 conditions per place. [2023-09-01 08:03:43,826 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-09-01 08:03:43,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-09-01 08:03:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:03:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:03:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-09-01 08:03:43,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581976112920738 [2023-09-01 08:03:43,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-09-01 08:03:43,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-09-01 08:03:43,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:43,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-09-01 08:03:43,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:43,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:43,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:43,864 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 422 transitions. [2023-09-01 08:03:43,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-09-01 08:03:43,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:03:43,871 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2023-09-01 08:03:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-09-01 08:03:43,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-09-01 08:03:43,880 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2023-09-01 08:03:43,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:43,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:43,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:03:43,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:03:43,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:43,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash 655141, now seen corresponding path program 1 times [2023-09-01 08:03:43,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:43,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904609519] [2023-09-01 08:03:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:44,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:44,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904609519] [2023-09-01 08:03:44,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904609519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:44,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196922405] [2023-09-01 08:03:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:44,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:44,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:44,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:03:44,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:03:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:03:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:03:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:44,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:03:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196922405] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:03:44,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:03:44,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:03:44,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632792697] [2023-09-01 08:03:44,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:03:44,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:03:44,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:03:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:03:44,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-09-01 08:03:44,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:44,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-09-01 08:03:44,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:44,528 INFO L130 PetriNetUnfolder]: 959/1441 cut-off events. [2023-09-01 08:03:44,528 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 08:03:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 1441 events. 959/1441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7307 event pairs, 445 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 2347. Up to 283 conditions per place. [2023-09-01 08:03:44,538 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 87 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2023-09-01 08:03:44,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 98 transitions, 432 flow [2023-09-01 08:03:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:03:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:03:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 974 transitions. [2023-09-01 08:03:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532340623545835 [2023-09-01 08:03:44,542 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 974 transitions. [2023-09-01 08:03:44,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 974 transitions. [2023-09-01 08:03:44,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:44,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 974 transitions. [2023-09-01 08:03:44,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,550 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 7 states and 974 transitions. [2023-09-01 08:03:44,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 98 transitions, 432 flow [2023-09-01 08:03:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 98 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:03:44,554 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 121 flow [2023-09-01 08:03:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 08:03:44,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 08:03:44,555 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 121 flow [2023-09-01 08:03:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:44,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 08:03:44,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 08:03:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:44,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:44,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 20310460, now seen corresponding path program 1 times [2023-09-01 08:03:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121928998] [2023-09-01 08:03:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:03:44,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:44,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121928998] [2023-09-01 08:03:44,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121928998] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:44,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:03:44,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:03:44,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018465961] [2023-09-01 08:03:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:44,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:03:44,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:44,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:03:44,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:03:44,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-09-01 08:03:44,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:44,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:44,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-09-01 08:03:44,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:45,052 INFO L130 PetriNetUnfolder]: 956/1437 cut-off events. [2023-09-01 08:03:45,053 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 08:03:45,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 1437 events. 956/1437 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7387 event pairs, 445 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 1754. Up to 1402 conditions per place. [2023-09-01 08:03:45,060 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 08:03:45,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 142 flow [2023-09-01 08:03:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:03:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:03:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-09-01 08:03:45,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996742671009774 [2023-09-01 08:03:45,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-09-01 08:03:45,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-09-01 08:03:45,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:45,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-09-01 08:03:45,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,067 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 121 flow. Second operand 3 states and 396 transitions. [2023-09-01 08:03:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 142 flow [2023-09-01 08:03:45,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 134 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:03:45,069 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 88 flow [2023-09-01 08:03:45,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-09-01 08:03:45,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-09-01 08:03:45,071 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 88 flow [2023-09-01 08:03:45,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:45,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:03:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 08:03:45,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:45,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash 629234067, now seen corresponding path program 1 times [2023-09-01 08:03:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:45,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649059962] [2023-09-01 08:03:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649059962] [2023-09-01 08:03:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649059962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:45,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:03:45,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:03:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196697101] [2023-09-01 08:03:45,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:45,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:03:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:03:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:03:45,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 307 [2023-09-01 08:03:45,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:45,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 307 [2023-09-01 08:03:45,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:45,499 INFO L130 PetriNetUnfolder]: 786/1432 cut-off events. [2023-09-01 08:03:45,499 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 08:03:45,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2918 conditions, 1432 events. 786/1432 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8624 event pairs, 225 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2906. Up to 791 conditions per place. [2023-09-01 08:03:45,507 INFO L137 encePairwiseOnDemand]: 300/307 looper letters, 42 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2023-09-01 08:03:45,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 238 flow [2023-09-01 08:03:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:03:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:03:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2023-09-01 08:03:45,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254071661237785 [2023-09-01 08:03:45,519 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2023-09-01 08:03:45,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2023-09-01 08:03:45,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:45,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2023-09-01 08:03:45,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,527 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 88 flow. Second operand 5 states and 653 transitions. [2023-09-01 08:03:45,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 238 flow [2023-09-01 08:03:45,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:03:45,529 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 129 flow [2023-09-01 08:03:45,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-09-01 08:03:45,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-09-01 08:03:45,530 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 129 flow [2023-09-01 08:03:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:45,531 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:03:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:03:45,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:45,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1956435670, now seen corresponding path program 2 times [2023-09-01 08:03:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630744251] [2023-09-01 08:03:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:45,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:45,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630744251] [2023-09-01 08:03:45,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630744251] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:45,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030139833] [2023-09-01 08:03:45,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:03:45,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:45,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:45,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:03:45,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:03:45,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:03:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:03:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:03:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:03:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:03:45,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:03:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030139833] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:03:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:03:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416466558] [2023-09-01 08:03:45,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:45,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:03:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:03:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:03:45,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-09-01 08:03:45,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:45,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-09-01 08:03:45,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:45,841 INFO L130 PetriNetUnfolder]: 851/1456 cut-off events. [2023-09-01 08:03:45,842 INFO L131 PetriNetUnfolder]: For 633/703 co-relation queries the response was YES. [2023-09-01 08:03:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1456 events. 851/1456 cut-off events. For 633/703 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 8890 event pairs, 525 based on Foata normal form. 56/972 useless extension candidates. Maximal degree in co-relation 3850. Up to 1436 conditions per place. [2023-09-01 08:03:45,848 INFO L137 encePairwiseOnDemand]: 305/307 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 08:03:45,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 169 flow [2023-09-01 08:03:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:03:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:03:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-09-01 08:03:45,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43213897937024975 [2023-09-01 08:03:45,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-09-01 08:03:45,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-09-01 08:03:45,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:45,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-09-01 08:03:45,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,854 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 129 flow. Second operand 3 states and 398 transitions. [2023-09-01 08:03:45,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 169 flow [2023-09-01 08:03:45,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 157 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 08:03:45,857 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2023-09-01 08:03:45,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-09-01 08:03:45,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-09-01 08:03:45,862 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2023-09-01 08:03:45,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:45,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:45,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:03:45,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:03:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:46,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:46,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash -891104295, now seen corresponding path program 1 times [2023-09-01 08:03:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471554496] [2023-09-01 08:03:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:46,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471554496] [2023-09-01 08:03:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471554496] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:46,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:03:46,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:03:46,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033643087] [2023-09-01 08:03:46,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:46,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:03:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:03:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:03:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 307 [2023-09-01 08:03:46,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:46,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 307 [2023-09-01 08:03:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:46,293 INFO L130 PetriNetUnfolder]: 690/1195 cut-off events. [2023-09-01 08:03:46,294 INFO L131 PetriNetUnfolder]: For 534/597 co-relation queries the response was YES. [2023-09-01 08:03:46,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1195 events. 690/1195 cut-off events. For 534/597 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 7111 event pairs, 429 based on Foata normal form. 59/822 useless extension candidates. Maximal degree in co-relation 3133. Up to 1150 conditions per place. [2023-09-01 08:03:46,300 INFO L137 encePairwiseOnDemand]: 301/307 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2023-09-01 08:03:46,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 199 flow [2023-09-01 08:03:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:03:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:03:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-09-01 08:03:46,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234527687296417 [2023-09-01 08:03:46,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-09-01 08:03:46,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-09-01 08:03:46,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:46,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-09-01 08:03:46,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,306 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,306 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 4 states and 520 transitions. [2023-09-01 08:03:46,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 199 flow [2023-09-01 08:03:46,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:03:46,308 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 124 flow [2023-09-01 08:03:46,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-09-01 08:03:46,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-09-01 08:03:46,309 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 124 flow [2023-09-01 08:03:46,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:46,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:03:46,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:03:46,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:46,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 689890302, now seen corresponding path program 1 times [2023-09-01 08:03:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:46,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708338805] [2023-09-01 08:03:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:46,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708338805] [2023-09-01 08:03:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708338805] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021916078] [2023-09-01 08:03:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:46,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:03:46,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:03:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:03:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:03:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:03:46,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:03:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021916078] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:03:46,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:03:46,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:03:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054359716] [2023-09-01 08:03:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:03:46,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:03:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:03:46,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 307 [2023-09-01 08:03:46,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:46,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 307 [2023-09-01 08:03:46,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:46,580 INFO L130 PetriNetUnfolder]: 309/554 cut-off events. [2023-09-01 08:03:46,580 INFO L131 PetriNetUnfolder]: For 548/580 co-relation queries the response was YES. [2023-09-01 08:03:46,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 554 events. 309/554 cut-off events. For 548/580 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2767 event pairs, 164 based on Foata normal form. 128/606 useless extension candidates. Maximal degree in co-relation 1557. Up to 538 conditions per place. [2023-09-01 08:03:46,582 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 17 selfloop transitions, 1 changer transitions 5/25 dead transitions. [2023-09-01 08:03:46,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 154 flow [2023-09-01 08:03:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:03:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:03:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-09-01 08:03:46,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43105320304017375 [2023-09-01 08:03:46,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-09-01 08:03:46,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-09-01 08:03:46,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:46,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-09-01 08:03:46,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,586 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 124 flow. Second operand 3 states and 397 transitions. [2023-09-01 08:03:46,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 154 flow [2023-09-01 08:03:46,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 144 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 08:03:46,588 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 83 flow [2023-09-01 08:03:46,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-09-01 08:03:46,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 08:03:46,589 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 83 flow [2023-09-01 08:03:46,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:46,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:46,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:03:46,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:03:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:46,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:46,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1559639799, now seen corresponding path program 1 times [2023-09-01 08:03:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:46,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107934068] [2023-09-01 08:03:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:47,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107934068] [2023-09-01 08:03:47,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107934068] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119041470] [2023-09-01 08:03:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:47,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:47,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:47,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:03:47,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:03:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 08:03:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:03:47,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:03:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:03:47,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:03:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:47,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:03:48,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:03:48,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-09-01 08:03:48,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:03:48,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-09-01 08:03:48,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:03:48,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 97 [2023-09-01 08:03:48,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:03:48,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2023-09-01 08:03:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:48,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119041470] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:03:48,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:03:48,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-09-01 08:03:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865615078] [2023-09-01 08:03:48,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:03:48,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:03:48,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:48,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:03:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=354, Unknown=2, NotChecked=0, Total=462 [2023-09-01 08:03:51,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:03:51,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 307 [2023-09-01 08:03:51,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 83 flow. Second operand has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:51,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:51,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 307 [2023-09-01 08:03:51,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:55,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:03:57,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:03:57,634 INFO L130 PetriNetUnfolder]: 353/606 cut-off events. [2023-09-01 08:03:57,634 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-09-01 08:03:57,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 606 events. 353/606 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2441 event pairs, 36 based on Foata normal form. 6/528 useless extension candidates. Maximal degree in co-relation 1751. Up to 290 conditions per place. [2023-09-01 08:03:57,640 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 65 selfloop transitions, 47 changer transitions 2/114 dead transitions. [2023-09-01 08:03:57,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 114 transitions, 648 flow [2023-09-01 08:03:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:03:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:03:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1897 transitions. [2023-09-01 08:03:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25746471226927253 [2023-09-01 08:03:57,661 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1897 transitions. [2023-09-01 08:03:57,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1897 transitions. [2023-09-01 08:03:57,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:57,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1897 transitions. [2023-09-01 08:03:57,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.04166666666667) internal successors, (1897), 24 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:57,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:57,674 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 307.0) internal successors, (7675), 25 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:57,675 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 83 flow. Second operand 24 states and 1897 transitions. [2023-09-01 08:03:57,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 114 transitions, 648 flow [2023-09-01 08:03:57,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 114 transitions, 601 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-09-01 08:03:57,678 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 435 flow [2023-09-01 08:03:57,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=435, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-09-01 08:03:57,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2023-09-01 08:03:57,680 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 435 flow [2023-09-01 08:03:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.36363636363636) internal successors, (1658), 22 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:03:57,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:03:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:57,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:03:57,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:03:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1936656204, now seen corresponding path program 1 times [2023-09-01 08:03:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:03:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850971389] [2023-09-01 08:03:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:03:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:03:58,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:03:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850971389] [2023-09-01 08:03:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850971389] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955049728] [2023-09-01 08:03:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:03:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:03:58,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:03:58,653 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:03:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:03:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:03:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:03:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:03:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:03:58,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:03:59,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:03:59,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 137 [2023-09-01 08:03:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:03:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955049728] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:03:59,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:03:59,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 16 [2023-09-01 08:03:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546670637] [2023-09-01 08:03:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:03:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:03:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:03:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:03:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:03:59,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 307 [2023-09-01 08:03:59,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:59,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:03:59,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 307 [2023-09-01 08:03:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:03:59,799 INFO L130 PetriNetUnfolder]: 375/648 cut-off events. [2023-09-01 08:03:59,800 INFO L131 PetriNetUnfolder]: For 1548/1548 co-relation queries the response was YES. [2023-09-01 08:03:59,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 648 events. 375/648 cut-off events. For 1548/1548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2717 event pairs, 44 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2479. Up to 439 conditions per place. [2023-09-01 08:03:59,803 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 55 selfloop transitions, 29 changer transitions 1/85 dead transitions. [2023-09-01 08:03:59,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 722 flow [2023-09-01 08:03:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:03:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:03:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 910 transitions. [2023-09-01 08:03:59,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705211726384365 [2023-09-01 08:03:59,806 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 910 transitions. [2023-09-01 08:03:59,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 910 transitions. [2023-09-01 08:03:59,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:03:59,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 910 transitions. [2023-09-01 08:03:59,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:59,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:59,811 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:59,811 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 435 flow. Second operand 8 states and 910 transitions. [2023-09-01 08:03:59,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 722 flow [2023-09-01 08:03:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 662 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-09-01 08:03:59,815 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 566 flow [2023-09-01 08:03:59,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=566, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-09-01 08:03:59,816 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-09-01 08:03:59,816 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 566 flow [2023-09-01 08:03:59,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:03:59,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:03:59,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:03:59,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 08:04:00,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:00,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:00,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -129723556, now seen corresponding path program 1 times [2023-09-01 08:04:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105832874] [2023-09-01 08:04:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:04:00,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105832874] [2023-09-01 08:04:00,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105832874] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370747090] [2023-09-01 08:04:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:00,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:00,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:00,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:04:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:04:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:00,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-09-01 08:04:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:00,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:00,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-09-01 08:04:00,467 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 08:04:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370747090] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:00,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:00,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-09-01 08:04:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512654716] [2023-09-01 08:04:00,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:04:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:04:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:04:00,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 307 [2023-09-01 08:04:00,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 566 flow. Second operand has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:00,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:00,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 307 [2023-09-01 08:04:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:00,933 INFO L130 PetriNetUnfolder]: 271/516 cut-off events. [2023-09-01 08:04:00,934 INFO L131 PetriNetUnfolder]: For 3889/3889 co-relation queries the response was YES. [2023-09-01 08:04:00,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 516 events. 271/516 cut-off events. For 3889/3889 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2296 event pairs, 52 based on Foata normal form. 132/642 useless extension candidates. Maximal degree in co-relation 2195. Up to 285 conditions per place. [2023-09-01 08:04:00,936 INFO L137 encePairwiseOnDemand]: 299/307 looper letters, 39 selfloop transitions, 14 changer transitions 29/85 dead transitions. [2023-09-01 08:04:00,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 765 flow [2023-09-01 08:04:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:04:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:04:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1405 transitions. [2023-09-01 08:04:00,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137893593919653 [2023-09-01 08:04:00,940 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1405 transitions. [2023-09-01 08:04:00,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1405 transitions. [2023-09-01 08:04:00,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:00,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1405 transitions. [2023-09-01 08:04:00,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.08333333333333) internal successors, (1405), 12 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:00,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:00,946 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 307.0) internal successors, (3991), 13 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:00,947 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 566 flow. Second operand 12 states and 1405 transitions. [2023-09-01 08:04:00,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 765 flow [2023-09-01 08:04:00,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 698 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-09-01 08:04:00,953 INFO L231 Difference]: Finished difference. Result has 76 places, 51 transitions, 438 flow [2023-09-01 08:04:00,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=76, PETRI_TRANSITIONS=51} [2023-09-01 08:04:00,953 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2023-09-01 08:04:00,953 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 51 transitions, 438 flow [2023-09-01 08:04:00,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.2) internal successors, (1713), 15 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:00,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:00,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:00,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:01,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:01,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:01,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash 93379440, now seen corresponding path program 2 times [2023-09-01 08:04:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322615870] [2023-09-01 08:04:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322615870] [2023-09-01 08:04:01,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322615870] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115677397] [2023-09-01 08:04:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:04:01,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:01,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:01,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:01,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:04:01,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:04:01,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 08:04:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:02,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:02,773 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-09-01 08:04:02,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 191 [2023-09-01 08:04:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115677397] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:04,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 08:04:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571303762] [2023-09-01 08:04:04,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:04,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:04:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:04:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:04:05,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 307 [2023-09-01 08:04:05,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 51 transitions, 438 flow. Second operand has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:05,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:05,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 307 [2023-09-01 08:04:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:07,247 INFO L130 PetriNetUnfolder]: 385/673 cut-off events. [2023-09-01 08:04:07,248 INFO L131 PetriNetUnfolder]: For 4958/4958 co-relation queries the response was YES. [2023-09-01 08:04:07,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3400 conditions, 673 events. 385/673 cut-off events. For 4958/4958 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2934 event pairs, 34 based on Foata normal form. 44/717 useless extension candidates. Maximal degree in co-relation 3369. Up to 291 conditions per place. [2023-09-01 08:04:07,252 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 75 selfloop transitions, 60 changer transitions 2/137 dead transitions. [2023-09-01 08:04:07,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1423 flow [2023-09-01 08:04:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 08:04:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 08:04:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2271 transitions. [2023-09-01 08:04:07,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216258320351225 [2023-09-01 08:04:07,262 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2271 transitions. [2023-09-01 08:04:07,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2271 transitions. [2023-09-01 08:04:07,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:07,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2271 transitions. [2023-09-01 08:04:07,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 98.73913043478261) internal successors, (2271), 23 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:07,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:07,273 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:07,273 INFO L175 Difference]: Start difference. First operand has 76 places, 51 transitions, 438 flow. Second operand 23 states and 2271 transitions. [2023-09-01 08:04:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1423 flow [2023-09-01 08:04:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1261 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-09-01 08:04:07,283 INFO L231 Difference]: Finished difference. Result has 84 places, 94 transitions, 1059 flow [2023-09-01 08:04:07,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1059, PETRI_PLACES=84, PETRI_TRANSITIONS=94} [2023-09-01 08:04:07,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-09-01 08:04:07,284 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 94 transitions, 1059 flow [2023-09-01 08:04:07,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:07,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:07,285 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:07,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:07,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:07,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2085225044, now seen corresponding path program 2 times [2023-09-01 08:04:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:07,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852831345] [2023-09-01 08:04:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852831345] [2023-09-01 08:04:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852831345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753280457] [2023-09-01 08:04:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:04:08,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:08,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:08,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:04:08,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:04:08,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:04:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:04:09,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:09,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:04:09,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 136 [2023-09-01 08:04:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:04:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753280457] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:09,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 18 [2023-09-01 08:04:09,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760216199] [2023-09-01 08:04:09,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:09,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:04:09,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:04:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:04:10,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 307 [2023-09-01 08:04:10,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 94 transitions, 1059 flow. Second operand has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:10,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:10,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 307 [2023-09-01 08:04:10,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:12,143 INFO L130 PetriNetUnfolder]: 497/875 cut-off events. [2023-09-01 08:04:12,143 INFO L131 PetriNetUnfolder]: For 4252/4252 co-relation queries the response was YES. [2023-09-01 08:04:12,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4605 conditions, 875 events. 497/875 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4101 event pairs, 50 based on Foata normal form. 60/935 useless extension candidates. Maximal degree in co-relation 4572. Up to 338 conditions per place. [2023-09-01 08:04:12,149 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 97 selfloop transitions, 56 changer transitions 8/161 dead transitions. [2023-09-01 08:04:12,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 161 transitions, 1900 flow [2023-09-01 08:04:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 08:04:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 08:04:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2304 transitions. [2023-09-01 08:04:12,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32629939102110184 [2023-09-01 08:04:12,153 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2304 transitions. [2023-09-01 08:04:12,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2304 transitions. [2023-09-01 08:04:12,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:12,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2304 transitions. [2023-09-01 08:04:12,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 100.17391304347827) internal successors, (2304), 23 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:12,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:12,163 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 307.0) internal successors, (7368), 24 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:12,163 INFO L175 Difference]: Start difference. First operand has 84 places, 94 transitions, 1059 flow. Second operand 23 states and 2304 transitions. [2023-09-01 08:04:12,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 161 transitions, 1900 flow [2023-09-01 08:04:12,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1576 flow, removed 155 selfloop flow, removed 6 redundant places. [2023-09-01 08:04:12,177 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 1091 flow [2023-09-01 08:04:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1091, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-09-01 08:04:12,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-09-01 08:04:12,179 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 1091 flow [2023-09-01 08:04:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:12,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:12,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:12,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 08:04:12,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 08:04:12,386 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:12,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1461832664, now seen corresponding path program 2 times [2023-09-01 08:04:12,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:12,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192707086] [2023-09-01 08:04:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192707086] [2023-09-01 08:04:13,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192707086] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135270935] [2023-09-01 08:04:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:04:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:13,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:13,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:04:13,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:04:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:04:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:04:14,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:14,886 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-09-01 08:04:14,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 206 [2023-09-01 08:04:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:04:15,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135270935] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:15,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:15,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 24 [2023-09-01 08:04:15,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961759425] [2023-09-01 08:04:15,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:15,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:04:15,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:04:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:04:16,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-09-01 08:04:16,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 1091 flow. Second operand has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:16,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:16,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-09-01 08:04:16,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:18,684 INFO L130 PetriNetUnfolder]: 749/1271 cut-off events. [2023-09-01 08:04:18,685 INFO L131 PetriNetUnfolder]: For 5752/5752 co-relation queries the response was YES. [2023-09-01 08:04:18,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6011 conditions, 1271 events. 749/1271 cut-off events. For 5752/5752 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6253 event pairs, 24 based on Foata normal form. 28/1299 useless extension candidates. Maximal degree in co-relation 5974. Up to 545 conditions per place. [2023-09-01 08:04:18,697 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 103 selfloop transitions, 107 changer transitions 9/219 dead transitions. [2023-09-01 08:04:18,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2236 flow [2023-09-01 08:04:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 08:04:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 08:04:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3400 transitions. [2023-09-01 08:04:18,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356035929325832 [2023-09-01 08:04:18,702 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3400 transitions. [2023-09-01 08:04:18,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3400 transitions. [2023-09-01 08:04:18,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:18,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3400 transitions. [2023-09-01 08:04:18,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.03030303030303) internal successors, (3400), 33 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:18,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:18,715 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 307.0) internal successors, (10438), 34 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:18,715 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 1091 flow. Second operand 33 states and 3400 transitions. [2023-09-01 08:04:18,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2236 flow [2023-09-01 08:04:18,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 219 transitions, 2114 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-09-01 08:04:18,737 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1889 flow [2023-09-01 08:04:18,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1889, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2023-09-01 08:04:18,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2023-09-01 08:04:18,738 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1889 flow [2023-09-01 08:04:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:18,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:18,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:18,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:18,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 08:04:18,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:18,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash -629147281, now seen corresponding path program 1 times [2023-09-01 08:04:18,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:18,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282039220] [2023-09-01 08:04:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:19,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282039220] [2023-09-01 08:04:19,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282039220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:19,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678634038] [2023-09-01 08:04:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:19,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:19,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:19,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:04:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:19,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 08:04:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:04:20,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-09-01 08:04:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:04:20,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:04:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:04:20,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:04:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:20,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:21,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:04:21,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 100 [2023-09-01 08:04:21,663 INFO L321 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-09-01 08:04:21,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 573 treesize of output 559 [2023-09-01 08:04:21,685 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:04:21,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:04:21,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-09-01 08:04:21,748 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-09-01 08:04:21,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 153 [2023-09-01 08:04:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:24,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678634038] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:24,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:24,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:04:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493221141] [2023-09-01 08:04:24,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:24,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:04:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:04:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=790, Unknown=3, NotChecked=0, Total=992 [2023-09-01 08:04:25,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-09-01 08:04:25,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1889 flow. Second operand has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:25,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:25,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-09-01 08:04:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:29,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:04:34,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:04:35,790 INFO L130 PetriNetUnfolder]: 881/1501 cut-off events. [2023-09-01 08:04:35,790 INFO L131 PetriNetUnfolder]: For 8498/8498 co-relation queries the response was YES. [2023-09-01 08:04:35,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 1501 events. 881/1501 cut-off events. For 8498/8498 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7673 event pairs, 100 based on Foata normal form. 40/1541 useless extension candidates. Maximal degree in co-relation 8295. Up to 886 conditions per place. [2023-09-01 08:04:35,805 INFO L137 encePairwiseOnDemand]: 296/307 looper letters, 157 selfloop transitions, 96 changer transitions 5/258 dead transitions. [2023-09-01 08:04:35,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3163 flow [2023-09-01 08:04:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 08:04:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 08:04:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2663 transitions. [2023-09-01 08:04:35,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2478362028850628 [2023-09-01 08:04:35,809 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2663 transitions. [2023-09-01 08:04:35,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2663 transitions. [2023-09-01 08:04:35,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:35,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2663 transitions. [2023-09-01 08:04:35,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 76.08571428571429) internal successors, (2663), 35 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:35,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:35,823 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 307.0) internal successors, (11052), 36 states have internal predecessors, (11052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:35,823 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1889 flow. Second operand 35 states and 2663 transitions. [2023-09-01 08:04:35,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3163 flow [2023-09-01 08:04:35,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 258 transitions, 2743 flow, removed 170 selfloop flow, removed 13 redundant places. [2023-09-01 08:04:35,862 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2318 flow [2023-09-01 08:04:35,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2318, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2023-09-01 08:04:35,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-09-01 08:04:35,863 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2318 flow [2023-09-01 08:04:35,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 73.3125) internal successors, (2346), 32 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:35,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:35,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:35,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:36,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:04:36,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:36,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1461544364, now seen corresponding path program 3 times [2023-09-01 08:04:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582817048] [2023-09-01 08:04:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582817048] [2023-09-01 08:04:38,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582817048] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233478729] [2023-09-01 08:04:38,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:04:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:38,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:38,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:04:38,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:04:38,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:04:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:04:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:39,042 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-09-01 08:04:39,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 200 [2023-09-01 08:04:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:04:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233478729] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:39,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:39,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 24 [2023-09-01 08:04:39,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833263709] [2023-09-01 08:04:39,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:04:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:04:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:04:41,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-09-01 08:04:41,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2318 flow. Second operand has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:41,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:41,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-09-01 08:04:41,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:43,694 INFO L130 PetriNetUnfolder]: 1133/1905 cut-off events. [2023-09-01 08:04:43,694 INFO L131 PetriNetUnfolder]: For 14481/14481 co-relation queries the response was YES. [2023-09-01 08:04:43,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 1905 events. 1133/1905 cut-off events. For 14481/14481 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10151 event pairs, 26 based on Foata normal form. 56/1961 useless extension candidates. Maximal degree in co-relation 10497. Up to 695 conditions per place. [2023-09-01 08:04:43,707 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 168 selfloop transitions, 131 changer transitions 7/306 dead transitions. [2023-09-01 08:04:43,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 306 transitions, 3881 flow [2023-09-01 08:04:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 08:04:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 08:04:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2726 transitions. [2023-09-01 08:04:43,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712424383434157 [2023-09-01 08:04:43,710 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2726 transitions. [2023-09-01 08:04:43,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2726 transitions. [2023-09-01 08:04:43,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:43,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2726 transitions. [2023-09-01 08:04:43,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.35714285714286) internal successors, (2726), 28 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:43,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:43,718 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 307.0) internal successors, (8903), 29 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:43,718 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2318 flow. Second operand 28 states and 2726 transitions. [2023-09-01 08:04:43,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 306 transitions, 3881 flow [2023-09-01 08:04:43,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 3658 flow, removed 82 selfloop flow, removed 16 redundant places. [2023-09-01 08:04:43,768 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2923 flow [2023-09-01 08:04:43,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2923, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2023-09-01 08:04:43,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2023-09-01 08:04:43,769 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2923 flow [2023-09-01 08:04:43,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 94.57692307692308) internal successors, (2459), 26 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:43,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:43,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:43,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:43,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 08:04:43,976 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:43,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1927834054, now seen corresponding path program 2 times [2023-09-01 08:04:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:43,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293519948] [2023-09-01 08:04:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:44,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293519948] [2023-09-01 08:04:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293519948] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398139596] [2023-09-01 08:04:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:04:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:44,746 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:04:44,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:04:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 08:04:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:46,212 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-09-01 08:04:46,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 278 treesize of output 239 [2023-09-01 08:04:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398139596] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:47,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:47,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-09-01 08:04:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636016521] [2023-09-01 08:04:47,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 08:04:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 08:04:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 08:04:49,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-09-01 08:04:49,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2923 flow. Second operand has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:49,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:49,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-09-01 08:04:49,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:04:51,961 INFO L130 PetriNetUnfolder]: 1601/2681 cut-off events. [2023-09-01 08:04:51,961 INFO L131 PetriNetUnfolder]: For 26550/26550 co-relation queries the response was YES. [2023-09-01 08:04:51,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2681 events. 1601/2681 cut-off events. For 26550/26550 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 15250 event pairs, 138 based on Foata normal form. 58/2739 useless extension candidates. Maximal degree in co-relation 16527. Up to 1401 conditions per place. [2023-09-01 08:04:51,985 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 203 selfloop transitions, 195 changer transitions 4/402 dead transitions. [2023-09-01 08:04:51,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 402 transitions, 5636 flow [2023-09-01 08:04:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 08:04:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 08:04:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3494 transitions. [2023-09-01 08:04:51,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33473845564284344 [2023-09-01 08:04:51,990 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3494 transitions. [2023-09-01 08:04:51,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3494 transitions. [2023-09-01 08:04:51,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:04:51,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3494 transitions. [2023-09-01 08:04:51,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 102.76470588235294) internal successors, (3494), 34 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:51,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:52,000 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 307.0) internal successors, (10745), 35 states have internal predecessors, (10745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:52,000 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2923 flow. Second operand 34 states and 3494 transitions. [2023-09-01 08:04:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 402 transitions, 5636 flow [2023-09-01 08:04:52,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 5411 flow, removed 51 selfloop flow, removed 18 redundant places. [2023-09-01 08:04:52,082 INFO L231 Difference]: Finished difference. Result has 212 places, 342 transitions, 5208 flow [2023-09-01 08:04:52,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5208, PETRI_PLACES=212, PETRI_TRANSITIONS=342} [2023-09-01 08:04:52,084 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-09-01 08:04:52,084 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 342 transitions, 5208 flow [2023-09-01 08:04:52,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.41176470588235) internal successors, (3380), 34 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:52,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:04:52,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:04:52,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:04:52,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 08:04:52,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:04:52,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:04:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1936771354, now seen corresponding path program 3 times [2023-09-01 08:04:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:04:52,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941034059] [2023-09-01 08:04:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:04:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:04:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:04:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:04:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:04:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941034059] [2023-09-01 08:04:53,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941034059] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:04:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791983179] [2023-09-01 08:04:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:04:53,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:04:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:04:53,601 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:04:53,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:04:53,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:04:53,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:04:53,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:04:53,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:04:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:04:53,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:04:54,380 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 08:04:54,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 188 [2023-09-01 08:04:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:04:54,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791983179] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:04:54,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:04:54,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2023-09-01 08:04:54,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627206759] [2023-09-01 08:04:54,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:04:54,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:04:54,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:04:54,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:04:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-09-01 08:04:56,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 307 [2023-09-01 08:04:56,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 342 transitions, 5208 flow. Second operand has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:04:56,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:04:56,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 307 [2023-09-01 08:04:56,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:00,526 INFO L130 PetriNetUnfolder]: 2059/3455 cut-off events. [2023-09-01 08:05:00,526 INFO L131 PetriNetUnfolder]: For 46775/46775 co-relation queries the response was YES. [2023-09-01 08:05:00,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24371 conditions, 3455 events. 2059/3455 cut-off events. For 46775/46775 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20182 event pairs, 108 based on Foata normal form. 124/3579 useless extension candidates. Maximal degree in co-relation 24295. Up to 1129 conditions per place. [2023-09-01 08:05:00,571 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 248 selfloop transitions, 294 changer transitions 6/548 dead transitions. [2023-09-01 08:05:00,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 548 transitions, 9632 flow [2023-09-01 08:05:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 08:05:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 08:05:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3851 transitions. [2023-09-01 08:05:00,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390263227396778 [2023-09-01 08:05:00,577 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3851 transitions. [2023-09-01 08:05:00,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3851 transitions. [2023-09-01 08:05:00,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:00,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3851 transitions. [2023-09-01 08:05:00,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 104.08108108108108) internal successors, (3851), 37 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:00,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:00,591 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:00,591 INFO L175 Difference]: Start difference. First operand has 212 places, 342 transitions, 5208 flow. Second operand 37 states and 3851 transitions. [2023-09-01 08:05:00,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 548 transitions, 9632 flow [2023-09-01 08:05:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 548 transitions, 8110 flow, removed 742 selfloop flow, removed 12 redundant places. [2023-09-01 08:05:00,974 INFO L231 Difference]: Finished difference. Result has 247 places, 445 transitions, 7276 flow [2023-09-01 08:05:00,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7276, PETRI_PLACES=247, PETRI_TRANSITIONS=445} [2023-09-01 08:05:00,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2023-09-01 08:05:00,975 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 445 transitions, 7276 flow [2023-09-01 08:05:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.91304347826087) internal successors, (2321), 23 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:00,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:01,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 08:05:01,182 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:01,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2020965747, now seen corresponding path program 4 times [2023-09-01 08:05:01,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:01,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087799348] [2023-09-01 08:05:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:01,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087799348] [2023-09-01 08:05:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087799348] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053859551] [2023-09-01 08:05:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:05:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:02,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:02,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:05:03,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:05:03,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:05:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 08:05:03,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:05:03,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:03,828 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 08:05:03,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 218 [2023-09-01 08:05:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:05:04,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053859551] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:04,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:04,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 27 [2023-09-01 08:05:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15078666] [2023-09-01 08:05:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:04,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:05:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:05:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-09-01 08:05:06,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-09-01 08:05:06,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 445 transitions, 7276 flow. Second operand has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:06,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:05:06,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-09-01 08:05:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:09,982 INFO L130 PetriNetUnfolder]: 2497/4201 cut-off events. [2023-09-01 08:05:09,983 INFO L131 PetriNetUnfolder]: For 55706/55706 co-relation queries the response was YES. [2023-09-01 08:05:10,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 4201 events. 2497/4201 cut-off events. For 55706/55706 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26040 event pairs, 182 based on Foata normal form. 32/4233 useless extension candidates. Maximal degree in co-relation 29105. Up to 1691 conditions per place. [2023-09-01 08:05:10,046 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 374 selfloop transitions, 272 changer transitions 7/653 dead transitions. [2023-09-01 08:05:10,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 653 transitions, 10824 flow [2023-09-01 08:05:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 08:05:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 08:05:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5011 transitions. [2023-09-01 08:05:10,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33311174632719537 [2023-09-01 08:05:10,051 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5011 transitions. [2023-09-01 08:05:10,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5011 transitions. [2023-09-01 08:05:10,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:10,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5011 transitions. [2023-09-01 08:05:10,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 102.26530612244898) internal successors, (5011), 49 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:10,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:10,064 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 307.0) internal successors, (15350), 50 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:10,064 INFO L175 Difference]: Start difference. First operand has 247 places, 445 transitions, 7276 flow. Second operand 49 states and 5011 transitions. [2023-09-01 08:05:10,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 653 transitions, 10824 flow [2023-09-01 08:05:10,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 653 transitions, 9459 flow, removed 641 selfloop flow, removed 16 redundant places. [2023-09-01 08:05:10,361 INFO L231 Difference]: Finished difference. Result has 290 places, 519 transitions, 8123 flow [2023-09-01 08:05:10,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8123, PETRI_PLACES=290, PETRI_TRANSITIONS=519} [2023-09-01 08:05:10,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2023-09-01 08:05:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 519 transitions, 8123 flow [2023-09-01 08:05:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.55172413793103) internal successors, (2887), 29 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:10,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:10,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:10,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:10,566 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:10,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 310829972, now seen corresponding path program 5 times [2023-09-01 08:05:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:10,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453567966] [2023-09-01 08:05:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:10,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:05:10,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:10,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453567966] [2023-09-01 08:05:10,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453567966] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:10,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251374043] [2023-09-01 08:05:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:05:10,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:10,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:10,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:10,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:05:10,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:05:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:05:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 08:05:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:05:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:11,775 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-09-01 08:05:11,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 179 [2023-09-01 08:05:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:05:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251374043] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:11,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:11,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 08:05:11,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406752674] [2023-09-01 08:05:11,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:05:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:05:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:05:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 307 [2023-09-01 08:05:12,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 519 transitions, 8123 flow. Second operand has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:12,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:05:12,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 307 [2023-09-01 08:05:12,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:13,115 INFO L130 PetriNetUnfolder]: 2189/3723 cut-off events. [2023-09-01 08:05:13,115 INFO L131 PetriNetUnfolder]: For 50016/50040 co-relation queries the response was YES. [2023-09-01 08:05:13,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25663 conditions, 3723 events. 2189/3723 cut-off events. For 50016/50040 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 22797 event pairs, 1132 based on Foata normal form. 24/3719 useless extension candidates. Maximal degree in co-relation 25572. Up to 3514 conditions per place. [2023-09-01 08:05:13,195 INFO L137 encePairwiseOnDemand]: 303/307 looper letters, 456 selfloop transitions, 9 changer transitions 2/479 dead transitions. [2023-09-01 08:05:13,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 479 transitions, 8333 flow [2023-09-01 08:05:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:05:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:05:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2023-09-01 08:05:13,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762214983713355 [2023-09-01 08:05:13,210 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2023-09-01 08:05:13,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2023-09-01 08:05:13,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:13,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2023-09-01 08:05:13,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:13,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:13,213 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 307.0) internal successors, (2763), 9 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:13,213 INFO L175 Difference]: Start difference. First operand has 290 places, 519 transitions, 8123 flow. Second operand 8 states and 924 transitions. [2023-09-01 08:05:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 479 transitions, 8333 flow [2023-09-01 08:05:13,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 479 transitions, 7825 flow, removed 176 selfloop flow, removed 29 redundant places. [2023-09-01 08:05:13,478 INFO L231 Difference]: Finished difference. Result has 260 places, 466 transitions, 6798 flow [2023-09-01 08:05:13,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=260, PETRI_TRANSITIONS=466} [2023-09-01 08:05:13,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2023-09-01 08:05:13,480 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 466 transitions, 6798 flow [2023-09-01 08:05:13,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.88888888888889) internal successors, (2032), 18 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:13,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:13,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:13,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:13,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:13,685 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:13,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 979867604, now seen corresponding path program 6 times [2023-09-01 08:05:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:13,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595165353] [2023-09-01 08:05:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:13,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:05:13,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:13,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595165353] [2023-09-01 08:05:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595165353] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:13,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794424119] [2023-09-01 08:05:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:05:13,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:13,861 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:13,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:05:14,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:05:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:05:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:05:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:14,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 110 [2023-09-01 08:05:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:14,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:14,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2023-09-01 08:05:14,489 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 08:05:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:14,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794424119] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:14,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:14,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-09-01 08:05:14,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377149156] [2023-09-01 08:05:14,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:05:14,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:05:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-09-01 08:05:14,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 307 [2023-09-01 08:05:14,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 466 transitions, 6798 flow. Second operand has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:14,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:05:14,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 307 [2023-09-01 08:05:14,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:15,782 INFO L130 PetriNetUnfolder]: 2439/4151 cut-off events. [2023-09-01 08:05:15,783 INFO L131 PetriNetUnfolder]: For 54666/54666 co-relation queries the response was YES. [2023-09-01 08:05:15,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 4151 events. 2439/4151 cut-off events. For 54666/54666 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25573 event pairs, 398 based on Foata normal form. 128/4275 useless extension candidates. Maximal degree in co-relation 27158. Up to 3021 conditions per place. [2023-09-01 08:05:15,818 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 376 selfloop transitions, 98 changer transitions 59/533 dead transitions. [2023-09-01 08:05:15,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 533 transitions, 8570 flow [2023-09-01 08:05:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:05:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:05:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2255 transitions. [2023-09-01 08:05:15,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36726384364820847 [2023-09-01 08:05:15,821 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2255 transitions. [2023-09-01 08:05:15,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2255 transitions. [2023-09-01 08:05:15,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:15,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2255 transitions. [2023-09-01 08:05:15,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.75) internal successors, (2255), 20 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:15,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:15,827 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 307.0) internal successors, (6447), 21 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:15,827 INFO L175 Difference]: Start difference. First operand has 260 places, 466 transitions, 6798 flow. Second operand 20 states and 2255 transitions. [2023-09-01 08:05:15,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 533 transitions, 8570 flow [2023-09-01 08:05:16,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 533 transitions, 8499 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-09-01 08:05:16,095 INFO L231 Difference]: Finished difference. Result has 278 places, 459 transitions, 7106 flow [2023-09-01 08:05:16,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7106, PETRI_PLACES=278, PETRI_TRANSITIONS=459} [2023-09-01 08:05:16,096 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2023-09-01 08:05:16,096 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 459 transitions, 7106 flow [2023-09-01 08:05:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.13636363636364) internal successors, (2423), 22 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:16,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:16,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:16,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:16,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:16,302 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:16,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:16,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1511061001, now seen corresponding path program 4 times [2023-09-01 08:05:16,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:16,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295833222] [2023-09-01 08:05:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:16,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295833222] [2023-09-01 08:05:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295833222] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769464198] [2023-09-01 08:05:18,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:05:18,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:18,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:18,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:05:18,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:05:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:05:18,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 08:05:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:18,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:19,848 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-09-01 08:05:19,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 278 treesize of output 244 [2023-09-01 08:05:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769464198] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:20,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-09-01 08:05:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850115974] [2023-09-01 08:05:20,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 08:05:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 08:05:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 08:05:24,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-09-01 08:05:24,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 459 transitions, 7106 flow. Second operand has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:24,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:05:24,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-09-01 08:05:24,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:34,572 INFO L130 PetriNetUnfolder]: 3955/6586 cut-off events. [2023-09-01 08:05:34,572 INFO L131 PetriNetUnfolder]: For 139294/139294 co-relation queries the response was YES. [2023-09-01 08:05:34,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51340 conditions, 6586 events. 3955/6586 cut-off events. For 139294/139294 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41459 event pairs, 288 based on Foata normal form. 180/6758 useless extension candidates. Maximal degree in co-relation 51248. Up to 2659 conditions per place. [2023-09-01 08:05:34,652 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 489 selfloop transitions, 552 changer transitions 11/1052 dead transitions. [2023-09-01 08:05:34,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1052 transitions, 19451 flow [2023-09-01 08:05:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-09-01 08:05:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-09-01 08:05:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 7844 transitions. [2023-09-01 08:05:34,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31543813085615474 [2023-09-01 08:05:34,658 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 7844 transitions. [2023-09-01 08:05:34,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 7844 transitions. [2023-09-01 08:05:34,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:34,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 7844 transitions. [2023-09-01 08:05:34,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 96.8395061728395) internal successors, (7844), 81 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:34,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:34,677 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 307.0) internal successors, (25174), 82 states have internal predecessors, (25174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:34,677 INFO L175 Difference]: Start difference. First operand has 278 places, 459 transitions, 7106 flow. Second operand 81 states and 7844 transitions. [2023-09-01 08:05:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1052 transitions, 19451 flow [2023-09-01 08:05:35,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1052 transitions, 18431 flow, removed 472 selfloop flow, removed 17 redundant places. [2023-09-01 08:05:35,213 INFO L231 Difference]: Finished difference. Result has 331 places, 863 transitions, 17282 flow [2023-09-01 08:05:35,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17282, PETRI_PLACES=331, PETRI_TRANSITIONS=863} [2023-09-01 08:05:35,214 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2023-09-01 08:05:35,214 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 863 transitions, 17282 flow [2023-09-01 08:05:35,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 93.22727272727273) internal successors, (4102), 44 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:35,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:35,215 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:35,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:35,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:35,420 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:35,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719910, now seen corresponding path program 7 times [2023-09-01 08:05:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485298805] [2023-09-01 08:05:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485298805] [2023-09-01 08:05:37,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485298805] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657729952] [2023-09-01 08:05:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:05:37,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:37,070 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:37,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:05:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:37,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 08:05:37,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:05:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:38,453 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-09-01 08:05:38,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 214 [2023-09-01 08:05:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:05:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657729952] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:38,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:38,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 34 [2023-09-01 08:05:38,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860299926] [2023-09-01 08:05:38,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 08:05:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 08:05:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-09-01 08:05:41,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-09-01 08:05:41,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 863 transitions, 17282 flow. Second operand has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:41,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:05:41,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-09-01 08:05:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:05:45,279 INFO L130 PetriNetUnfolder]: 4007/6718 cut-off events. [2023-09-01 08:05:45,280 INFO L131 PetriNetUnfolder]: For 124776/124776 co-relation queries the response was YES. [2023-09-01 08:05:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53640 conditions, 6718 events. 4007/6718 cut-off events. For 124776/124776 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42956 event pairs, 446 based on Foata normal form. 108/6826 useless extension candidates. Maximal degree in co-relation 53543. Up to 3417 conditions per place. [2023-09-01 08:05:45,346 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 652 selfloop transitions, 274 changer transitions 11/937 dead transitions. [2023-09-01 08:05:45,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 937 transitions, 20109 flow [2023-09-01 08:05:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 08:05:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 08:05:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2023-09-01 08:05:45,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33280916544984834 [2023-09-01 08:05:45,349 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2023-09-01 08:05:45,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2023-09-01 08:05:45,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:05:45,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2023-09-01 08:05:45,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:45,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:45,357 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 307.0) internal successors, (9210), 30 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:45,357 INFO L175 Difference]: Start difference. First operand has 331 places, 863 transitions, 17282 flow. Second operand 29 states and 2963 transitions. [2023-09-01 08:05:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 937 transitions, 20109 flow [2023-09-01 08:05:46,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 937 transitions, 15060 flow, removed 2493 selfloop flow, removed 14 redundant places. [2023-09-01 08:05:46,535 INFO L231 Difference]: Finished difference. Result has 350 places, 858 transitions, 13308 flow [2023-09-01 08:05:46,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12148, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13308, PETRI_PLACES=350, PETRI_TRANSITIONS=858} [2023-09-01 08:05:46,536 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-09-01 08:05:46,536 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 858 transitions, 13308 flow [2023-09-01 08:05:46,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 99.47222222222223) internal successors, (3581), 36 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:05:46,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:05:46,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:05:46,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:05:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:46,744 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:05:46,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:05:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1516416119, now seen corresponding path program 5 times [2023-09-01 08:05:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:05:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522161273] [2023-09-01 08:05:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:05:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:05:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:05:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:05:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522161273] [2023-09-01 08:05:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522161273] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:05:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123148546] [2023-09-01 08:05:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:05:48,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:05:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:05:48,006 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:05:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:05:48,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:05:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:05:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 08:05:48,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:05:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:48,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:05:50,157 INFO L321 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2023-09-01 08:05:50,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 276 treesize of output 246 [2023-09-01 08:05:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:05:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123148546] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:05:52,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:05:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-09-01 08:05:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646298782] [2023-09-01 08:05:52,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:05:52,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 08:05:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:05:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 08:05:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 08:05:56,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:05:58,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:05:59,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:06:01,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:06:03,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 307 [2023-09-01 08:06:03,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 858 transitions, 13308 flow. Second operand has 43 states, 43 states have (on average 95.25581395348837) internal successors, (4096), 43 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:03,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:03,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 307 [2023-09-01 08:06:03,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:10,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:06:28,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:06:33,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:06:35,724 INFO L130 PetriNetUnfolder]: 5959/9906 cut-off events. [2023-09-01 08:06:35,725 INFO L131 PetriNetUnfolder]: For 125861/125861 co-relation queries the response was YES. [2023-09-01 08:06:35,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 9906 events. 5959/9906 cut-off events. For 125861/125861 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 66470 event pairs, 852 based on Foata normal form. 140/9994 useless extension candidates. Maximal degree in co-relation 66108. Up to 4797 conditions per place. [2023-09-01 08:06:35,830 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 945 selfloop transitions, 615 changer transitions 12/1572 dead transitions. [2023-09-01 08:06:35,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1572 transitions, 25240 flow [2023-09-01 08:06:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-09-01 08:06:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-09-01 08:06:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9432 transitions. [2023-09-01 08:06:35,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32003257328990226 [2023-09-01 08:06:35,838 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9432 transitions. [2023-09-01 08:06:35,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9432 transitions. [2023-09-01 08:06:35,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:35,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9432 transitions. [2023-09-01 08:06:35,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 98.25) internal successors, (9432), 96 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:35,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:35,861 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 307.0) internal successors, (29779), 97 states have internal predecessors, (29779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:35,861 INFO L175 Difference]: Start difference. First operand has 350 places, 858 transitions, 13308 flow. Second operand 96 states and 9432 transitions. [2023-09-01 08:06:35,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1572 transitions, 25240 flow [2023-09-01 08:06:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1572 transitions, 24770 flow, removed 151 selfloop flow, removed 20 redundant places. [2023-09-01 08:06:36,809 INFO L231 Difference]: Finished difference. Result has 450 places, 1209 transitions, 21034 flow [2023-09-01 08:06:36,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=12997, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=21034, PETRI_PLACES=450, PETRI_TRANSITIONS=1209} [2023-09-01 08:06:36,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 420 predicate places. [2023-09-01 08:06:36,811 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1209 transitions, 21034 flow [2023-09-01 08:06:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 95.25581395348837) internal successors, (4096), 43 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:36,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:36,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:36,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:37,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:37,018 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:06:37,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash 355266967, now seen corresponding path program 8 times [2023-09-01 08:06:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:37,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204706715] [2023-09-01 08:06:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:38,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204706715] [2023-09-01 08:06:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204706715] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993954420] [2023-09-01 08:06:38,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:38,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:38,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:38,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:06:38,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:06:38,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:06:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 08:06:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:38,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:06:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:06:38,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:06:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:06:38,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:06:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:39,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:40,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:06:40,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 104 [2023-09-01 08:06:40,584 INFO L321 Elim1Store]: treesize reduction 10, result has 90.3 percent of original size [2023-09-01 08:06:40,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 317 treesize of output 358 [2023-09-01 08:06:40,632 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-09-01 08:06:40,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 241 [2023-09-01 08:06:40,687 INFO L321 Elim1Store]: treesize reduction 10, result has 82.5 percent of original size [2023-09-01 08:06:40,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 177 [2023-09-01 08:06:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:06:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993954420] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:49,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-09-01 08:06:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8255417] [2023-09-01 08:06:49,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 08:06:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 08:06:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1472, Unknown=2, NotChecked=0, Total=1722 [2023-09-01 08:06:52,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-09-01 08:06:52,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1209 transitions, 21034 flow. Second operand has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:52,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:52,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-09-01 08:06:52,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:07:20,309 INFO L130 PetriNetUnfolder]: 8213/13560 cut-off events. [2023-09-01 08:07:20,309 INFO L131 PetriNetUnfolder]: For 300178/300178 co-relation queries the response was YES. [2023-09-01 08:07:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104303 conditions, 13560 events. 8213/13560 cut-off events. For 300178/300178 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 94086 event pairs, 818 based on Foata normal form. 308/13812 useless extension candidates. Maximal degree in co-relation 104180. Up to 6760 conditions per place. [2023-09-01 08:07:20,492 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1076 selfloop transitions, 968 changer transitions 8/2052 dead transitions. [2023-09-01 08:07:20,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2052 transitions, 37951 flow [2023-09-01 08:07:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-09-01 08:07:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-09-01 08:07:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 8500 transitions. [2023-09-01 08:07:20,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2494351028552983 [2023-09-01 08:07:20,511 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 8500 transitions. [2023-09-01 08:07:20,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 8500 transitions. [2023-09-01 08:07:20,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:07:20,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 8500 transitions. [2023-09-01 08:07:20,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 76.57657657657657) internal successors, (8500), 111 states have internal predecessors, (8500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:20,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:20,542 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 307.0) internal successors, (34384), 112 states have internal predecessors, (34384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:20,542 INFO L175 Difference]: Start difference. First operand has 450 places, 1209 transitions, 21034 flow. Second operand 111 states and 8500 transitions. [2023-09-01 08:07:20,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2052 transitions, 37951 flow [2023-09-01 08:07:23,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2052 transitions, 35659 flow, removed 946 selfloop flow, removed 24 redundant places. [2023-09-01 08:07:23,223 INFO L231 Difference]: Finished difference. Result has 576 places, 1714 transitions, 32855 flow [2023-09-01 08:07:23,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=18881, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=32855, PETRI_PLACES=576, PETRI_TRANSITIONS=1714} [2023-09-01 08:07:23,224 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2023-09-01 08:07:23,225 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1714 transitions, 32855 flow [2023-09-01 08:07:23,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 73.28571428571429) internal successors, (3078), 42 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:23,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:07:23,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:07:23,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 08:07:23,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 08:07:23,433 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:07:23,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:07:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 355555265, now seen corresponding path program 6 times [2023-09-01 08:07:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:07:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51543969] [2023-09-01 08:07:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:07:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:07:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:07:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:07:24,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:07:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51543969] [2023-09-01 08:07:24,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51543969] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:07:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024422887] [2023-09-01 08:07:24,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:07:24,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:07:24,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:07:24,669 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:07:24,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:07:24,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:07:24,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:07:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 08:07:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:07:24,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:07:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:07:25,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:07:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:07:25,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:07:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:07:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:07:27,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:07:27,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-09-01 08:07:27,469 INFO L321 Elim1Store]: treesize reduction 30, result has 78.7 percent of original size [2023-09-01 08:07:27,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 437 [2023-09-01 08:07:27,552 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 08:07:27,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-09-01 08:07:27,628 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 08:07:27,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-09-01 08:07:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:07:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024422887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:07:37,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:07:37,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-09-01 08:07:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111586279] [2023-09-01 08:07:37,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:07:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 08:07:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:07:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 08:07:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1446, Unknown=2, NotChecked=0, Total=1806 [2023-09-01 08:07:39,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 307 [2023-09-01 08:07:39,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1714 transitions, 32855 flow. Second operand has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:39,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:07:39,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 307 [2023-09-01 08:07:39,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:07:43,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:07:45,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:08:12,131 INFO L130 PetriNetUnfolder]: 9643/15986 cut-off events. [2023-09-01 08:08:12,131 INFO L131 PetriNetUnfolder]: For 391310/391310 co-relation queries the response was YES. [2023-09-01 08:08:12,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133016 conditions, 15986 events. 9643/15986 cut-off events. For 391310/391310 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 116072 event pairs, 995 based on Foata normal form. 152/16086 useless extension candidates. Maximal degree in co-relation 132854. Up to 9910 conditions per place. [2023-09-01 08:08:12,389 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1394 selfloop transitions, 851 changer transitions 17/2262 dead transitions. [2023-09-01 08:08:12,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 2262 transitions, 48974 flow [2023-09-01 08:08:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-09-01 08:08:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-09-01 08:08:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6561 transitions. [2023-09-01 08:08:12,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24850390121960458 [2023-09-01 08:08:12,394 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6561 transitions. [2023-09-01 08:08:12,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6561 transitions. [2023-09-01 08:08:12,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:08:12,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6561 transitions. [2023-09-01 08:08:12,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 76.29069767441861) internal successors, (6561), 86 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:12,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:12,533 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 307.0) internal successors, (26709), 87 states have internal predecessors, (26709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:12,533 INFO L175 Difference]: Start difference. First operand has 576 places, 1714 transitions, 32855 flow. Second operand 86 states and 6561 transitions. [2023-09-01 08:08:12,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 2262 transitions, 48974 flow [2023-09-01 08:08:20,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 2262 transitions, 39260 flow, removed 4660 selfloop flow, removed 27 redundant places. [2023-09-01 08:08:20,632 INFO L231 Difference]: Finished difference. Result has 651 places, 2031 transitions, 36066 flow [2023-09-01 08:08:20,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=27002, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=36066, PETRI_PLACES=651, PETRI_TRANSITIONS=2031} [2023-09-01 08:08:20,634 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 621 predicate places. [2023-09-01 08:08:20,634 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 2031 transitions, 36066 flow [2023-09-01 08:08:20,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 73.25581395348837) internal successors, (3150), 43 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:20,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:08:20,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:08:20,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 08:08:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 08:08:20,839 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:08:20,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:08:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash 71954555, now seen corresponding path program 7 times [2023-09-01 08:08:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:08:20,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794966984] [2023-09-01 08:08:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:08:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:08:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:08:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794966984] [2023-09-01 08:08:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794966984] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:08:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105219326] [2023-09-01 08:08:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:08:21,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:08:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:08:21,677 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:08:21,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:08:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:21,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 08:08:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:08:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:22,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:08:23,611 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-09-01 08:08:23,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-09-01 08:08:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105219326] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:08:24,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:08:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-09-01 08:08:24,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158879824] [2023-09-01 08:08:24,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:08:24,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 08:08:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:08:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 08:08:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 08:08:27,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-09-01 08:08:27,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 2031 transitions, 36066 flow. Second operand has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:27,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:08:27,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-09-01 08:08:27,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:08:42,013 INFO L130 PetriNetUnfolder]: 11839/19638 cut-off events. [2023-09-01 08:08:42,013 INFO L131 PetriNetUnfolder]: For 342346/342346 co-relation queries the response was YES. [2023-09-01 08:08:42,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150342 conditions, 19638 events. 11839/19638 cut-off events. For 342346/342346 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 148568 event pairs, 1170 based on Foata normal form. 192/19742 useless extension candidates. Maximal degree in co-relation 150165. Up to 14121 conditions per place. [2023-09-01 08:08:42,362 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 1770 selfloop transitions, 854 changer transitions 4/2628 dead transitions. [2023-09-01 08:08:42,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2628 transitions, 53163 flow [2023-09-01 08:08:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 08:08:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 08:08:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4836 transitions. [2023-09-01 08:08:42,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31504885993485343 [2023-09-01 08:08:42,367 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4836 transitions. [2023-09-01 08:08:42,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4836 transitions. [2023-09-01 08:08:42,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:08:42,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4836 transitions. [2023-09-01 08:08:42,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 96.72) internal successors, (4836), 50 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:42,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:42,378 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 307.0) internal successors, (15657), 51 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:42,378 INFO L175 Difference]: Start difference. First operand has 651 places, 2031 transitions, 36066 flow. Second operand 50 states and 4836 transitions. [2023-09-01 08:08:42,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2628 transitions, 53163 flow [2023-09-01 08:08:49,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 2628 transitions, 50216 flow, removed 1370 selfloop flow, removed 29 redundant places. [2023-09-01 08:08:49,892 INFO L231 Difference]: Finished difference. Result has 698 places, 2491 transitions, 47309 flow [2023-09-01 08:08:49,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=33531, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=47309, PETRI_PLACES=698, PETRI_TRANSITIONS=2491} [2023-09-01 08:08:49,894 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 668 predicate places. [2023-09-01 08:08:49,895 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 2491 transitions, 47309 flow [2023-09-01 08:08:49,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:49,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:08:49,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:08:49,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:08:50,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 08:08:50,111 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:08:50,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:08:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 355266965, now seen corresponding path program 8 times [2023-09-01 08:08:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:08:50,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865755870] [2023-09-01 08:08:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:08:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:08:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:50,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:08:50,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865755870] [2023-09-01 08:08:50,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865755870] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:08:50,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048342019] [2023-09-01 08:08:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:08:50,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:08:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:08:50,921 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:08:50,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:08:51,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:08:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:08:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 08:08:51,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:08:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:51,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:08:52,848 INFO L321 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2023-09-01 08:08:52,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 287 treesize of output 266 [2023-09-01 08:08:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:56,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048342019] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:08:56,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:08:56,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2023-09-01 08:08:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935640332] [2023-09-01 08:08:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:08:56,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 08:08:56,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:08:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 08:08:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 08:09:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 307 [2023-09-01 08:09:00,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 2491 transitions, 47309 flow. Second operand has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:00,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:00,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 307 [2023-09-01 08:09:00,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:27,808 INFO L130 PetriNetUnfolder]: 17303/28550 cut-off events. [2023-09-01 08:09:27,808 INFO L131 PetriNetUnfolder]: For 660528/660528 co-relation queries the response was YES. [2023-09-01 08:09:28,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245074 conditions, 28550 events. 17303/28550 cut-off events. For 660528/660528 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 222184 event pairs, 1262 based on Foata normal form. 728/29218 useless extension candidates. Maximal degree in co-relation 244874. Up to 12393 conditions per place. [2023-09-01 08:09:28,489 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 1303 selfloop transitions, 2699 changer transitions 9/4011 dead transitions. [2023-09-01 08:09:28,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 4011 transitions, 92286 flow [2023-09-01 08:09:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-09-01 08:09:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-09-01 08:09:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7666 transitions. [2023-09-01 08:09:28,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332942453854506 [2023-09-01 08:09:28,494 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7666 transitions. [2023-09-01 08:09:28,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7666 transitions. [2023-09-01 08:09:28,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:28,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7666 transitions. [2023-09-01 08:09:28,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 102.21333333333334) internal successors, (7666), 75 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,509 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 307.0) internal successors, (23332), 76 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,509 INFO L175 Difference]: Start difference. First operand has 698 places, 2491 transitions, 47309 flow. Second operand 75 states and 7666 transitions. [2023-09-01 08:09:28,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 4011 transitions, 92286 flow [2023-09-01 08:09:43,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 4011 transitions, 85749 flow, removed 2975 selfloop flow, removed 40 redundant places. [2023-09-01 08:09:43,700 INFO L231 Difference]: Finished difference. Result has 754 places, 3659 transitions, 84139 flow [2023-09-01 08:09:43,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=37711, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=84139, PETRI_PLACES=754, PETRI_TRANSITIONS=3659} [2023-09-01 08:09:43,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 724 predicate places. [2023-09-01 08:09:43,702 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 3659 transitions, 84139 flow [2023-09-01 08:09:43,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 98.28571428571429) internal successors, (4128), 42 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:43,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:43,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:43,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 08:09:43,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:43,908 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:09:43,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1511349299, now seen corresponding path program 9 times [2023-09-01 08:09:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:43,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391454344] [2023-09-01 08:09:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:45,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:45,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391454344] [2023-09-01 08:09:45,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391454344] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:45,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311672486] [2023-09-01 08:09:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:09:45,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:45,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:45,403 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:45,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:09:45,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:09:45,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:09:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 08:09:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:09:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:46,842 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-09-01 08:09:46,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 220 [2023-09-01 08:09:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:09:47,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311672486] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:47,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:47,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 28 [2023-09-01 08:09:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121573891] [2023-09-01 08:09:47,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:09:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:09:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-09-01 08:09:50,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-09-01 08:09:50,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 3659 transitions, 84139 flow. Second operand has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:50,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:50,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-09-01 08:09:50,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:31,538 INFO L130 PetriNetUnfolder]: 20807/34470 cut-off events. [2023-09-01 08:10:31,538 INFO L131 PetriNetUnfolder]: For 881826/881826 co-relation queries the response was YES. [2023-09-01 08:10:32,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313066 conditions, 34470 events. 20807/34470 cut-off events. For 881826/881826 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 277748 event pairs, 1596 based on Foata normal form. 500/34946 useless extension candidates. Maximal degree in co-relation 312848. Up to 19883 conditions per place. [2023-09-01 08:10:33,274 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 2817 selfloop transitions, 1860 changer transitions 15/4692 dead transitions. [2023-09-01 08:10:33,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 4692 transitions, 117053 flow [2023-09-01 08:10:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-09-01 08:10:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-09-01 08:10:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6453 transitions. [2023-09-01 08:10:33,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31847793899911164 [2023-09-01 08:10:33,279 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6453 transitions. [2023-09-01 08:10:33,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6453 transitions. [2023-09-01 08:10:33,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:33,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6453 transitions. [2023-09-01 08:10:33,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 97.77272727272727) internal successors, (6453), 66 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:33,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:33,292 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 307.0) internal successors, (20569), 67 states have internal predecessors, (20569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:33,292 INFO L175 Difference]: Start difference. First operand has 754 places, 3659 transitions, 84139 flow. Second operand 66 states and 6453 transitions. [2023-09-01 08:10:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 4692 transitions, 117053 flow [2023-09-01 08:11:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 4692 transitions, 100128 flow, removed 8310 selfloop flow, removed 20 redundant places. [2023-09-01 08:11:12,581 INFO L231 Difference]: Finished difference. Result has 814 places, 4373 transitions, 93599 flow [2023-09-01 08:11:12,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=69502, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2099, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=93599, PETRI_PLACES=814, PETRI_TRANSITIONS=4373} [2023-09-01 08:11:12,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 784 predicate places. [2023-09-01 08:11:12,588 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 4373 transitions, 93599 flow [2023-09-01 08:11:12,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 94.66666666666667) internal successors, (2840), 30 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:12,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:11:12,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:11:12,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-09-01 08:11:12,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 08:11:12,793 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:11:12,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:11:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2133719912, now seen corresponding path program 9 times [2023-09-01 08:11:12,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:11:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069095105] [2023-09-01 08:11:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:11:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:11:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069095105] [2023-09-01 08:11:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069095105] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:11:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674197795] [2023-09-01 08:11:14,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:11:14,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:11:14,214 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:11:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 08:11:14,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:11:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:11:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 08:11:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:11:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:11:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:11:16,200 INFO L321 Elim1Store]: treesize reduction 44, result has 74.0 percent of original size [2023-09-01 08:11:16,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 329 treesize of output 337 [2023-09-01 08:11:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:11:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674197795] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:11:22,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:11:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 32 [2023-09-01 08:11:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125306623] [2023-09-01 08:11:22,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:11:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 08:11:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:11:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 08:11:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 08:11:26,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 307 [2023-09-01 08:11:26,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 4373 transitions, 93599 flow. Second operand has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:26,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:11:26,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 307 [2023-09-01 08:11:26,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:12:16,853 INFO L130 PetriNetUnfolder]: 22879/37930 cut-off events. [2023-09-01 08:12:16,853 INFO L131 PetriNetUnfolder]: For 766837/766837 co-relation queries the response was YES. [2023-09-01 08:12:18,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321491 conditions, 37930 events. 22879/37930 cut-off events. For 766837/766837 co-relation queries the response was YES. Maximal size of possible extension queue 2037. Compared 310307 event pairs, 2200 based on Foata normal form. 88/37990 useless extension candidates. Maximal degree in co-relation 321257. Up to 28027 conditions per place. [2023-09-01 08:12:18,551 INFO L137 encePairwiseOnDemand]: 298/307 looper letters, 3859 selfloop transitions, 1108 changer transitions 12/4979 dead transitions. [2023-09-01 08:12:18,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 4979 transitions, 116404 flow [2023-09-01 08:12:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 08:12:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 08:12:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5210 transitions. [2023-09-01 08:12:18,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33275851057035194 [2023-09-01 08:12:18,556 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5210 transitions. [2023-09-01 08:12:18,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5210 transitions. [2023-09-01 08:12:18,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:12:18,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5210 transitions. [2023-09-01 08:12:18,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 102.15686274509804) internal successors, (5210), 51 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:18,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:18,571 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 307.0) internal successors, (15964), 52 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:18,571 INFO L175 Difference]: Start difference. First operand has 814 places, 4373 transitions, 93599 flow. Second operand 51 states and 5210 transitions. [2023-09-01 08:12:18,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 4979 transitions, 116404 flow [2023-09-01 08:13:01,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 4979 transitions, 111645 flow, removed 1867 selfloop flow, removed 31 redundant places. [2023-09-01 08:13:01,639 INFO L231 Difference]: Finished difference. Result has 846 places, 4708 transitions, 101868 flow [2023-09-01 08:13:01,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=89444, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=101868, PETRI_PLACES=846, PETRI_TRANSITIONS=4708} [2023-09-01 08:13:01,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 816 predicate places. [2023-09-01 08:13:01,644 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 4708 transitions, 101868 flow [2023-09-01 08:13:01,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 99.5) internal successors, (3383), 34 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:01,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:13:01,645 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:13:01,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 08:13:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 08:13:01,850 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:13:01,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:13:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2114439413, now seen corresponding path program 10 times [2023-09-01 08:13:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:13:01,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406343985] [2023-09-01 08:13:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:13:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:13:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:13:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:13:03,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:13:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406343985] [2023-09-01 08:13:03,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406343985] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:13:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785432697] [2023-09-01 08:13:03,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:13:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:13:03,934 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:13:03,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 08:13:04,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:13:04,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:13:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 08:13:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:13:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:13:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:13:05,714 INFO L321 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2023-09-01 08:13:05,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 270 [2023-09-01 08:13:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 08:13:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785432697] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:13:06,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:13:06,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 39 [2023-09-01 08:13:06,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923997112] [2023-09-01 08:13:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:13:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 08:13:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:13:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 08:13:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 08:13:11,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 307 [2023-09-01 08:13:11,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 4708 transitions, 101868 flow. Second operand has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:11,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:13:11,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 307 [2023-09-01 08:13:11,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:14:12,723 INFO L130 PetriNetUnfolder]: 25525/42440 cut-off events. [2023-09-01 08:14:12,723 INFO L131 PetriNetUnfolder]: For 872603/872603 co-relation queries the response was YES. [2023-09-01 08:14:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361176 conditions, 42440 events. 25525/42440 cut-off events. For 872603/872603 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 352862 event pairs, 2278 based on Foata normal form. 60/42472 useless extension candidates. Maximal degree in co-relation 360933. Up to 29413 conditions per place. [2023-09-01 08:14:14,872 INFO L137 encePairwiseOnDemand]: 297/307 looper letters, 4017 selfloop transitions, 1419 changer transitions 23/5459 dead transitions. [2023-09-01 08:14:14,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 5459 transitions, 128873 flow [2023-09-01 08:14:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-09-01 08:14:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-09-01 08:14:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5933 transitions. [2023-09-01 08:14:14,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3168152934266033 [2023-09-01 08:14:14,893 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5933 transitions. [2023-09-01 08:14:14,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5933 transitions. [2023-09-01 08:14:14,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:14:14,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5933 transitions. [2023-09-01 08:14:14,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 97.26229508196721) internal successors, (5933), 61 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:14,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:14,906 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 307.0) internal successors, (19034), 62 states have internal predecessors, (19034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:14,907 INFO L175 Difference]: Start difference. First operand has 846 places, 4708 transitions, 101868 flow. Second operand 61 states and 5933 transitions. [2023-09-01 08:14:14,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 5459 transitions, 128873 flow [2023-09-01 08:15:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 888 places, 5459 transitions, 127060 flow, removed 862 selfloop flow, removed 18 redundant places. [2023-09-01 08:15:03,289 INFO L231 Difference]: Finished difference. Result has 901 places, 5122 transitions, 115869 flow [2023-09-01 08:15:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=100303, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=115869, PETRI_PLACES=901, PETRI_TRANSITIONS=5122} [2023-09-01 08:15:03,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 871 predicate places. [2023-09-01 08:15:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 5122 transitions, 115869 flow [2023-09-01 08:15:03,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.34146341463415) internal successors, (3868), 41 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:15:03,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:15:03,294 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:15:03,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 08:15:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:15:03,500 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:15:03,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:15:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 241348892, now seen corresponding path program 10 times [2023-09-01 08:15:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:15:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125366806] [2023-09-01 08:15:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:15:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:15:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:15:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:15:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:15:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125366806] [2023-09-01 08:15:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125366806] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:15:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626119002] [2023-09-01 08:15:04,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:15:04,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:15:04,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:15:04,751 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:15:04,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 08:15:04,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:15:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:15:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 08:15:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:15:04,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:15:05,063 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:15:05,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-09-01 08:15:05,191 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:15:05,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 08:15:05,281 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:15:05,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 08:15:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:15:05,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:15:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:15:05,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-09-01 08:15:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:15:06,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:15:09,163 INFO L321 Elim1Store]: treesize reduction 112, result has 40.4 percent of original size [2023-09-01 08:15:09,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 366 treesize of output 210 [2023-09-01 08:15:09,625 INFO L321 Elim1Store]: treesize reduction 10, result has 96.9 percent of original size [2023-09-01 08:15:09,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1135 treesize of output 1297 [2023-09-01 08:15:09,718 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:15:09,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:15:09,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 391 treesize of output 430 [2023-09-01 08:15:09,933 INFO L321 Elim1Store]: treesize reduction 10, result has 89.7 percent of original size [2023-09-01 08:15:09,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 369 treesize of output 361 Killed by 15