./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:49:57,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:49:57,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:49:57,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:49:57,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:49:57,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:49:57,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:49:57,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:49:57,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:49:57,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:49:57,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:49:57,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:49:57,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:49:57,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:49:57,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:49:57,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:49:57,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:49:57,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:49:57,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:49:57,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:49:57,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:49:57,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:49:57,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:49:57,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:49:57,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:49:57,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:49:57,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:49:57,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:49:57,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:49:57,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:49:57,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:49:57,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:49:57,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:49:57,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:49:57,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:49:57,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:49:57,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:49:57,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:49:57,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:49:57,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:49:57,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:49:58,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:49:58,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:49:58,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:49:58,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:49:58,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:49:58,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:49:58,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:49:58,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:49:58,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:49:58,039 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:49:58,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:49:58,040 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:49:58,040 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:49:58,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:49:58,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:49:58,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:49:58,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:49:58,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:49:58,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:49:58,041 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:49:58,041 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:49:58,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:49:58,042 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:49:58,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:49:58,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:49:58,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:49:58,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:49:58,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:49:58,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:49:58,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:49:58,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:49:58,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:49:58,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:49:58,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:49:58,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:49:58,045 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:49:58,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:49:58,045 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:49:58,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:49:58,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:49:58,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:49:58,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:49:58,376 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:49:58,377 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:49:58,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 15:49:59,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:49:59,837 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:49:59,838 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 15:49:59,846 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2f77734/55fd19ee10bf459e89af262d70a99426/FLAGa997a56fe [2023-08-30 15:49:59,860 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2f77734/55fd19ee10bf459e89af262d70a99426 [2023-08-30 15:49:59,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:49:59,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:49:59,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:49:59,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:49:59,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:49:59,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:49:59" (1/1) ... [2023-08-30 15:49:59,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6553da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:49:59, skipping insertion in model container [2023-08-30 15:49:59,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:49:59" (1/1) ... [2023-08-30 15:49:59,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:49:59,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:50:00,031 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-send-receive.wvr.c[3107,3120] [2023-08-30 15:50:00,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:50:00,044 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:50:00,064 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-send-receive.wvr.c[3107,3120] [2023-08-30 15:50:00,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:50:00,076 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:50:00,076 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:50:00,082 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:50:00,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00 WrapperNode [2023-08-30 15:50:00,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:50:00,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:50:00,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:50:00,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:50:00,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,119 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-08-30 15:50:00,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:50:00,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:50:00,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:50:00,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:50:00,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:50:00,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:50:00,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:50:00,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:50:00,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (1/1) ... [2023-08-30 15:50:00,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:50:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:00,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:50:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:50:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:50:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:50:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:50:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:50:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:50:00,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:50:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:50:00,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:50:00,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:50:00,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:50:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:50:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:50:00,250 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:50:00,405 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:50:00,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:50:00,740 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:50:00,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:50:00,915 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:50:00,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:50:00 BoogieIcfgContainer [2023-08-30 15:50:00,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:50:00,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:50:00,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:50:00,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:50:00,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:49:59" (1/3) ... [2023-08-30 15:50:00,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a22c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:50:00, skipping insertion in model container [2023-08-30 15:50:00,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:50:00" (2/3) ... [2023-08-30 15:50:00,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a22c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:50:00, skipping insertion in model container [2023-08-30 15:50:00,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:50:00" (3/3) ... [2023-08-30 15:50:00,934 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-08-30 15:50:00,941 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:50:00,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:50:00,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 15:50:00,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:50:01,054 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 15:50:01,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 146 transitions, 316 flow [2023-08-30 15:50:01,134 INFO L130 PetriNetUnfolder]: 10/143 cut-off events. [2023-08-30 15:50:01,134 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:50:01,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 143 events. 10/143 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 15:50:01,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 146 transitions, 316 flow [2023-08-30 15:50:01,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 268 flow [2023-08-30 15:50:01,149 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:50:01,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 128 transitions, 268 flow [2023-08-30 15:50:01,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 128 transitions, 268 flow [2023-08-30 15:50:01,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 128 transitions, 268 flow [2023-08-30 15:50:01,188 INFO L130 PetriNetUnfolder]: 10/128 cut-off events. [2023-08-30 15:50:01,188 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:50:01,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 128 events. 10/128 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 15:50:01,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 1764 [2023-08-30 15:50:06,588 INFO L134 LiptonReduction]: Checked pairs total: 2655 [2023-08-30 15:50:06,588 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 15:50:06,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:50:06,615 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;@5324d34b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:50:06,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-30 15:50:06,620 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:50:06,620 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:50:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:50:06,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:06,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash 20429, now seen corresponding path program 1 times [2023-08-30 15:50:06,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293265237] [2023-08-30 15:50:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:06,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:06,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:06,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293265237] [2023-08-30 15:50:06,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293265237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:06,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:50:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:50:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351491508] [2023-08-30 15:50:06,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:50:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:50:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:50:06,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 15:50:06,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:06,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:06,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 15:50:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:07,241 INFO L130 PetriNetUnfolder]: 845/1357 cut-off events. [2023-08-30 15:50:07,242 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2023-08-30 15:50:07,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 1357 events. 845/1357 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7731 event pairs, 806 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 1300. Up to 661 conditions per place. [2023-08-30 15:50:07,254 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-30 15:50:07,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 210 flow [2023-08-30 15:50:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:50:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:50:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-30 15:50:07,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006105006105006 [2023-08-30 15:50:07,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-30 15:50:07,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-30 15:50:07,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:07,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-30 15:50:07,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:07,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:07,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:07,280 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 72 flow. Second operand 3 states and 410 transitions. [2023-08-30 15:50:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 210 flow [2023-08-30 15:50:07,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:50:07,287 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 74 flow [2023-08-30 15:50:07,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 15:50:07,292 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 15:50:07,292 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 74 flow [2023-08-30 15:50:07,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:07,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:07,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:50:07,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:50:07,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:07,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 634105, now seen corresponding path program 1 times [2023-08-30 15:50:07,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:07,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344198687] [2023-08-30 15:50:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344198687] [2023-08-30 15:50:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344198687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307314470] [2023-08-30 15:50:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:07,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:07,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:07,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:50:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:50:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:07,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307314470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:07,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:50:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601995045] [2023-08-30 15:50:07,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:50:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:50:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:50:07,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 15:50:07,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:07,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:07,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 15:50:07,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:08,166 INFO L130 PetriNetUnfolder]: 2114/3391 cut-off events. [2023-08-30 15:50:08,167 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 15:50:08,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 3391 events. 2114/3391 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 22224 event pairs, 2015 based on Foata normal form. 0/2025 useless extension candidates. Maximal degree in co-relation 5695. Up to 660 conditions per place. [2023-08-30 15:50:08,189 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 102 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-08-30 15:50:08,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 114 transitions, 504 flow [2023-08-30 15:50:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:50:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:50:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 947 transitions. [2023-08-30 15:50:08,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955520669806384 [2023-08-30 15:50:08,193 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 947 transitions. [2023-08-30 15:50:08,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 947 transitions. [2023-08-30 15:50:08,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:08,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 947 transitions. [2023-08-30 15:50:08,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:08,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:08,202 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:08,202 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 7 states and 947 transitions. [2023-08-30 15:50:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 114 transitions, 504 flow [2023-08-30 15:50:08,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 114 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:50:08,205 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 131 flow [2023-08-30 15:50:08,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-30 15:50:08,206 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 15:50:08,206 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 131 flow [2023-08-30 15:50:08,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:08,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:08,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 15:50:08,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:08,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:08,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 19658062, now seen corresponding path program 1 times [2023-08-30 15:50:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:08,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946220888] [2023-08-30 15:50:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:08,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946220888] [2023-08-30 15:50:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946220888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209297102] [2023-08-30 15:50:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:08,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:08,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:08,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:50:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:50:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:08,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:08,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209297102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:08,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:08,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 15:50:08,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566092239] [2023-08-30 15:50:08,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:08,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:50:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:08,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:50:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:50:08,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 15:50:08,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:08,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:08,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 15:50:08,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:09,088 INFO L130 PetriNetUnfolder]: 2111/3387 cut-off events. [2023-08-30 15:50:09,089 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 15:50:09,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 3387 events. 2111/3387 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 22515 event pairs, 2015 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 4265. Up to 1973 conditions per place. [2023-08-30 15:50:09,109 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 15:50:09,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 330 flow [2023-08-30 15:50:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:50:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:50:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-30 15:50:09,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484981684981685 [2023-08-30 15:50:09,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-30 15:50:09,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-30 15:50:09,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:09,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-30 15:50:09,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,117 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,118 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 131 flow. Second operand 5 states and 662 transitions. [2023-08-30 15:50:09,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 330 flow [2023-08-30 15:50:09,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 322 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:50:09,120 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 102 flow [2023-08-30 15:50:09,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 15:50:09,121 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 15:50:09,121 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 102 flow [2023-08-30 15:50:09,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:09,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:50:09,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 15:50:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 15:50:09,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:09,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 609342769, now seen corresponding path program 1 times [2023-08-30 15:50:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945341821] [2023-08-30 15:50:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945341821] [2023-08-30 15:50:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945341821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:50:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:50:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610026267] [2023-08-30 15:50:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:50:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:50:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:50:09,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-30 15:50:09,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:09,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-30 15:50:09,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:09,850 INFO L130 PetriNetUnfolder]: 2656/4092 cut-off events. [2023-08-30 15:50:09,851 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-08-30 15:50:09,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8370 conditions, 4092 events. 2656/4092 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24616 event pairs, 895 based on Foata normal form. 0/2287 useless extension candidates. Maximal degree in co-relation 6677. Up to 2921 conditions per place. [2023-08-30 15:50:09,872 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-30 15:50:09,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 203 flow [2023-08-30 15:50:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:50:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:50:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-08-30 15:50:09,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713064713064713 [2023-08-30 15:50:09,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-08-30 15:50:09,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-08-30 15:50:09,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:09,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-08-30 15:50:09,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,878 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 102 flow. Second operand 3 states and 386 transitions. [2023-08-30 15:50:09,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 203 flow [2023-08-30 15:50:09,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:50:09,880 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 115 flow [2023-08-30 15:50:09,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 15:50:09,881 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 15:50:09,881 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 115 flow [2023-08-30 15:50:09,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:09,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:09,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:50:09,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:50:09,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:09,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1711553229, now seen corresponding path program 2 times [2023-08-30 15:50:09,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:09,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325252623] [2023-08-30 15:50:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:09,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325252623] [2023-08-30 15:50:09,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325252623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166685813] [2023-08-30 15:50:09,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:50:09,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:09,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:09,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:10,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:50:10,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:50:10,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:50:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:50:10,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:10,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166685813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:10,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:10,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:50:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26052651] [2023-08-30 15:50:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:50:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:50:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:50:10,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-08-30 15:50:10,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:10,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-08-30 15:50:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:10,481 INFO L130 PetriNetUnfolder]: 2656/4041 cut-off events. [2023-08-30 15:50:10,482 INFO L131 PetriNetUnfolder]: For 413/413 co-relation queries the response was YES. [2023-08-30 15:50:10,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 4041 events. 2656/4041 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 24067 event pairs, 1855 based on Foata normal form. 1/2717 useless extension candidates. Maximal degree in co-relation 7693. Up to 3886 conditions per place. [2023-08-30 15:50:10,506 INFO L137 encePairwiseOnDemand]: 271/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 15:50:10,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 159 flow [2023-08-30 15:50:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:50:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:50:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-30 15:50:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46764346764346765 [2023-08-30 15:50:10,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-30 15:50:10,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-30 15:50:10,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:10,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-30 15:50:10,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,538 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 115 flow. Second operand 3 states and 383 transitions. [2023-08-30 15:50:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 159 flow [2023-08-30 15:50:10,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 147 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 15:50:10,545 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 95 flow [2023-08-30 15:50:10,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-30 15:50:10,548 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-08-30 15:50:10,548 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 95 flow [2023-08-30 15:50:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:10,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:10,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:10,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:10,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1467362211, now seen corresponding path program 1 times [2023-08-30 15:50:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:10,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252629503] [2023-08-30 15:50:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252629503] [2023-08-30 15:50:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252629503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:10,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:50:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:50:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528609614] [2023-08-30 15:50:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:10,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:50:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:50:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:50:10,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-30 15:50:10,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:10,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:10,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-30 15:50:10,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:11,201 INFO L130 PetriNetUnfolder]: 2184/3347 cut-off events. [2023-08-30 15:50:11,201 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-08-30 15:50:11,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3347 events. 2184/3347 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 19315 event pairs, 1543 based on Foata normal form. 16/2306 useless extension candidates. Maximal degree in co-relation 7874. Up to 3110 conditions per place. [2023-08-30 15:50:11,223 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 25 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-08-30 15:50:11,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2023-08-30 15:50:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:50:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:50:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-08-30 15:50:11,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606227106227106 [2023-08-30 15:50:11,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-08-30 15:50:11,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-08-30 15:50:11,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:11,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-08-30 15:50:11,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,230 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 95 flow. Second operand 4 states and 503 transitions. [2023-08-30 15:50:11,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2023-08-30 15:50:11,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:50:11,231 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 108 flow [2023-08-30 15:50:11,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 15:50:11,232 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 15:50:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 108 flow [2023-08-30 15:50:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 15:50:11,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:11,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -220976649, now seen corresponding path program 1 times [2023-08-30 15:50:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607472640] [2023-08-30 15:50:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607472640] [2023-08-30 15:50:11,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607472640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047416192] [2023-08-30 15:50:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:11,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:11,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:11,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:50:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:50:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:11,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:11,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047416192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:11,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:11,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:50:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522491923] [2023-08-30 15:50:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:11,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:50:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:50:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:50:11,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-08-30 15:50:11,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:11,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-08-30 15:50:11,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:11,592 INFO L130 PetriNetUnfolder]: 973/1538 cut-off events. [2023-08-30 15:50:11,592 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-08-30 15:50:11,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 1538 events. 973/1538 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7870 event pairs, 644 based on Foata normal form. 184/1494 useless extension candidates. Maximal degree in co-relation 3710. Up to 1462 conditions per place. [2023-08-30 15:50:11,599 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 20 selfloop transitions, 1 changer transitions 3/27 dead transitions. [2023-08-30 15:50:11,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 144 flow [2023-08-30 15:50:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:50:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:50:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 15:50:11,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642246642246643 [2023-08-30 15:50:11,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 15:50:11,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 15:50:11,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:11,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 15:50:11,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,605 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 108 flow. Second operand 3 states and 382 transitions. [2023-08-30 15:50:11,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 144 flow [2023-08-30 15:50:11,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 15:50:11,606 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 83 flow [2023-08-30 15:50:11,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-08-30 15:50:11,607 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-30 15:50:11,607 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 83 flow [2023-08-30 15:50:11,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:11,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:11,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:11,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:11,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:11,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:11,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1905150117, now seen corresponding path program 1 times [2023-08-30 15:50:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020080833] [2023-08-30 15:50:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020080833] [2023-08-30 15:50:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020080833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366201359] [2023-08-30 15:50:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:12,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:12,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:12,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:50:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:50:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:12,514 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 [2023-08-30 15:50:12,573 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 [2023-08-30 15:50:12,629 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 [2023-08-30 15:50:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:12,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:13,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:13,230 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 [2023-08-30 15:50:13,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:13,244 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 [2023-08-30 15:50:13,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:13,264 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 132 treesize of output 116 [2023-08-30 15:50:13,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:13,278 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 83 treesize of output 79 [2023-08-30 15:50:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366201359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:13,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-08-30 15:50:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742099645] [2023-08-30 15:50:13,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:50:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:50:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=227, Unknown=1, NotChecked=0, Total=306 [2023-08-30 15:50:13,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 15:50:13,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 83 flow. Second operand has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:13,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:13,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 15:50:13,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:15,481 INFO L130 PetriNetUnfolder]: 2024/3196 cut-off events. [2023-08-30 15:50:15,482 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2023-08-30 15:50:15,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 3196 events. 2024/3196 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17221 event pairs, 280 based on Foata normal form. 12/2843 useless extension candidates. Maximal degree in co-relation 7767. Up to 1251 conditions per place. [2023-08-30 15:50:15,498 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 119 selfloop transitions, 66 changer transitions 3/188 dead transitions. [2023-08-30 15:50:15,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 188 transitions, 912 flow [2023-08-30 15:50:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:50:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:50:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2023-08-30 15:50:15,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846886446886447 [2023-08-30 15:50:15,506 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2023-08-30 15:50:15,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2023-08-30 15:50:15,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:15,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2023-08-30 15:50:15,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,523 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,523 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 83 flow. Second operand 25 states and 1943 transitions. [2023-08-30 15:50:15,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 188 transitions, 912 flow [2023-08-30 15:50:15,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 188 transitions, 911 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:50:15,528 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 600 flow [2023-08-30 15:50:15,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=600, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2023-08-30 15:50:15,529 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2023-08-30 15:50:15,530 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 600 flow [2023-08-30 15:50:15,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:15,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:15,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:15,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:15,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:15,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash -97608240, now seen corresponding path program 1 times [2023-08-30 15:50:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:15,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417124598] [2023-08-30 15:50:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:16,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417124598] [2023-08-30 15:50:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417124598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254666330] [2023-08-30 15:50:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:16,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:16,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:50:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:16,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:50:16,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:16,448 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 [2023-08-30 15:50:16,505 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 [2023-08-30 15:50:16,565 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 [2023-08-30 15:50:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:16,731 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 [2023-08-30 15:50:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:16,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:17,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:17,243 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 65 treesize of output 53 [2023-08-30 15:50:17,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:17,256 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 484 treesize of output 460 [2023-08-30 15:50:17,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 152 treesize of output 128 [2023-08-30 15:50:17,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:17,292 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 126 treesize of output 122 [2023-08-30 15:50:17,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:17,308 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 125 treesize of output 109 [2023-08-30 15:50:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254666330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:17,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:17,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-30 15:50:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855502799] [2023-08-30 15:50:17,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:17,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:50:17,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:50:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=450, Unknown=3, NotChecked=0, Total=552 [2023-08-30 15:50:18,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 15:50:18,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 600 flow. Second operand has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:18,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:18,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 15:50:18,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:20,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:50:22,809 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_307 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_307) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and (or (< 2147483646 c_~back~0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) .cse0 (< c_~back~0 0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (or .cse0 (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)))) is different from false [2023-08-30 15:50:23,880 INFO L130 PetriNetUnfolder]: 2549/4094 cut-off events. [2023-08-30 15:50:23,880 INFO L131 PetriNetUnfolder]: For 17876/17876 co-relation queries the response was YES. [2023-08-30 15:50:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 4094 events. 2549/4094 cut-off events. For 17876/17876 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23645 event pairs, 570 based on Foata normal form. 210/4304 useless extension candidates. Maximal degree in co-relation 17404. Up to 1965 conditions per place. [2023-08-30 15:50:23,905 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 163 selfloop transitions, 125 changer transitions 5/293 dead transitions. [2023-08-30 15:50:23,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 293 transitions, 2413 flow [2023-08-30 15:50:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:50:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:50:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2649 transitions. [2023-08-30 15:50:23,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2695360195360195 [2023-08-30 15:50:23,914 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2649 transitions. [2023-08-30 15:50:23,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2649 transitions. [2023-08-30 15:50:23,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:23,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2649 transitions. [2023-08-30 15:50:23,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:23,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:23,934 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:23,934 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 600 flow. Second operand 36 states and 2649 transitions. [2023-08-30 15:50:23,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 293 transitions, 2413 flow [2023-08-30 15:50:23,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 293 transitions, 2321 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-30 15:50:23,977 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1441 flow [2023-08-30 15:50:23,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1441, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2023-08-30 15:50:23,978 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2023-08-30 15:50:23,978 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1441 flow [2023-08-30 15:50:23,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:23,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:23,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:23,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:24,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:24,186 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:24,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash -846278372, now seen corresponding path program 1 times [2023-08-30 15:50:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:24,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454933840] [2023-08-30 15:50:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454933840] [2023-08-30 15:50:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454933840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135211127] [2023-08-30 15:50:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:25,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:25,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:25,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:50:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 15:50:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:25,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:25,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:25,466 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 61 treesize of output 45 [2023-08-30 15:50:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135211127] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:50:25,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 13 [2023-08-30 15:50:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100022723] [2023-08-30 15:50:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:50:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:50:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:50:25,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-08-30 15:50:25,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1441 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:25,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:25,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-08-30 15:50:25,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:26,403 INFO L130 PetriNetUnfolder]: 2282/3749 cut-off events. [2023-08-30 15:50:26,404 INFO L131 PetriNetUnfolder]: For 46262/46309 co-relation queries the response was YES. [2023-08-30 15:50:26,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3749 events. 2282/3749 cut-off events. For 46262/46309 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 22686 event pairs, 167 based on Foata normal form. 66/3815 useless extension candidates. Maximal degree in co-relation 23065. Up to 1677 conditions per place. [2023-08-30 15:50:26,441 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 216 selfloop transitions, 74 changer transitions 3/304 dead transitions. [2023-08-30 15:50:26,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 304 transitions, 3307 flow [2023-08-30 15:50:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:50:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:50:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2023-08-30 15:50:26,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055468341182627 [2023-08-30 15:50:26,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 775 transitions. [2023-08-30 15:50:26,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 775 transitions. [2023-08-30 15:50:26,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:26,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 775 transitions. [2023-08-30 15:50:26,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:26,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:26,451 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:26,452 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1441 flow. Second operand 7 states and 775 transitions. [2023-08-30 15:50:26,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 304 transitions, 3307 flow [2023-08-30 15:50:26,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 304 transitions, 3139 flow, removed 70 selfloop flow, removed 7 redundant places. [2023-08-30 15:50:26,688 INFO L231 Difference]: Finished difference. Result has 126 places, 217 transitions, 2169 flow [2023-08-30 15:50:26,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=126, PETRI_TRANSITIONS=217} [2023-08-30 15:50:26,690 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2023-08-30 15:50:26,690 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 217 transitions, 2169 flow [2023-08-30 15:50:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:26,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:26,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:26,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:26,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:26,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash -644454118, now seen corresponding path program 2 times [2023-08-30 15:50:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:26,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313962682] [2023-08-30 15:50:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313962682] [2023-08-30 15:50:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313962682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156738524] [2023-08-30 15:50:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:50:28,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:28,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:28,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:50:28,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:50:28,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:50:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:50:28,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156738524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:28,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:28,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-08-30 15:50:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445817798] [2023-08-30 15:50:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:50:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:50:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:50:28,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-08-30 15:50:28,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 217 transitions, 2169 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:28,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:28,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-08-30 15:50:28,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:28,792 INFO L130 PetriNetUnfolder]: 1828/3020 cut-off events. [2023-08-30 15:50:28,792 INFO L131 PetriNetUnfolder]: For 48386/48415 co-relation queries the response was YES. [2023-08-30 15:50:28,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20187 conditions, 3020 events. 1828/3020 cut-off events. For 48386/48415 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17482 event pairs, 284 based on Foata normal form. 45/3065 useless extension candidates. Maximal degree in co-relation 20133. Up to 2485 conditions per place. [2023-08-30 15:50:28,819 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 174 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2023-08-30 15:50:28,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 237 transitions, 2785 flow [2023-08-30 15:50:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:50:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:50:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 670 transitions. [2023-08-30 15:50:28,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409035409035409 [2023-08-30 15:50:28,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 670 transitions. [2023-08-30 15:50:28,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 670 transitions. [2023-08-30 15:50:28,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:28,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 670 transitions. [2023-08-30 15:50:28,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:28,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:28,827 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:28,827 INFO L175 Difference]: Start difference. First operand has 126 places, 217 transitions, 2169 flow. Second operand 6 states and 670 transitions. [2023-08-30 15:50:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 237 transitions, 2785 flow [2023-08-30 15:50:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 237 transitions, 2686 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-30 15:50:29,025 INFO L231 Difference]: Finished difference. Result has 130 places, 217 transitions, 2209 flow [2023-08-30 15:50:29,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2209, PETRI_PLACES=130, PETRI_TRANSITIONS=217} [2023-08-30 15:50:29,025 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2023-08-30 15:50:29,025 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 217 transitions, 2209 flow [2023-08-30 15:50:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:29,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:29,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:29,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:29,231 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,SelfDestructingSolverStorable10 [2023-08-30 15:50:29,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:29,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash 967492083, now seen corresponding path program 1 times [2023-08-30 15:50:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690344436] [2023-08-30 15:50:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690344436] [2023-08-30 15:50:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690344436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043710625] [2023-08-30 15:50:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:30,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:30,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:30,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:50:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 15:50:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:30,495 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 18 treesize of output 20 [2023-08-30 15:50:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:30,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:30,562 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_452 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_452) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)) is different from false [2023-08-30 15:50:30,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:30,611 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 82 treesize of output 66 [2023-08-30 15:50:30,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-08-30 15:50:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043710625] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:50:31,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-30 15:50:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346740342] [2023-08-30 15:50:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:50:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:50:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2023-08-30 15:50:31,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-30 15:50:31,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 217 transitions, 2209 flow. Second operand has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:31,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:31,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-30 15:50:31,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:31,875 INFO L130 PetriNetUnfolder]: 2726/4310 cut-off events. [2023-08-30 15:50:31,875 INFO L131 PetriNetUnfolder]: For 56355/56355 co-relation queries the response was YES. [2023-08-30 15:50:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28388 conditions, 4310 events. 2726/4310 cut-off events. For 56355/56355 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24506 event pairs, 570 based on Foata normal form. 49/4359 useless extension candidates. Maximal degree in co-relation 28333. Up to 3274 conditions per place. [2023-08-30 15:50:31,905 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 227 selfloop transitions, 112 changer transitions 1/340 dead transitions. [2023-08-30 15:50:31,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 340 transitions, 4248 flow [2023-08-30 15:50:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:50:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:50:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 828 transitions. [2023-08-30 15:50:31,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336996336996337 [2023-08-30 15:50:31,912 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 828 transitions. [2023-08-30 15:50:31,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 828 transitions. [2023-08-30 15:50:31,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:31,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 828 transitions. [2023-08-30 15:50:31,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:31,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:31,921 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:31,922 INFO L175 Difference]: Start difference. First operand has 130 places, 217 transitions, 2209 flow. Second operand 9 states and 828 transitions. [2023-08-30 15:50:31,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 340 transitions, 4248 flow [2023-08-30 15:50:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 340 transitions, 4125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 15:50:32,128 INFO L231 Difference]: Finished difference. Result has 142 places, 289 transitions, 3568 flow [2023-08-30 15:50:32,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3568, PETRI_PLACES=142, PETRI_TRANSITIONS=289} [2023-08-30 15:50:32,129 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 105 predicate places. [2023-08-30 15:50:32,129 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 289 transitions, 3568 flow [2023-08-30 15:50:32,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:32,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:32,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:32,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:32,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:32,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:32,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash -464822802, now seen corresponding path program 3 times [2023-08-30 15:50:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:32,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925753079] [2023-08-30 15:50:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:32,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925753079] [2023-08-30 15:50:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925753079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152146025] [2023-08-30 15:50:33,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:50:33,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:33,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:33,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:50:33,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:50:33,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:50:33,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:33,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:50:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:33,662 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 18 treesize of output 20 [2023-08-30 15:50:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:33,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152146025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:33,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:33,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 15:50:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154330033] [2023-08-30 15:50:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:50:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:50:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:50:33,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-08-30 15:50:33,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 289 transitions, 3568 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:33,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:33,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-08-30 15:50:33,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:34,537 INFO L130 PetriNetUnfolder]: 2389/3924 cut-off events. [2023-08-30 15:50:34,537 INFO L131 PetriNetUnfolder]: For 74669/74712 co-relation queries the response was YES. [2023-08-30 15:50:34,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28911 conditions, 3924 events. 2389/3924 cut-off events. For 74669/74712 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23523 event pairs, 355 based on Foata normal form. 70/3994 useless extension candidates. Maximal degree in co-relation 28850. Up to 2336 conditions per place. [2023-08-30 15:50:34,563 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 203 selfloop transitions, 100 changer transitions 0/317 dead transitions. [2023-08-30 15:50:34,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 317 transitions, 4474 flow [2023-08-30 15:50:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:50:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:50:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2023-08-30 15:50:34,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2023-08-30 15:50:34,565 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2023-08-30 15:50:34,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2023-08-30 15:50:34,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:34,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2023-08-30 15:50:34,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:34,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:34,570 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:34,570 INFO L175 Difference]: Start difference. First operand has 142 places, 289 transitions, 3568 flow. Second operand 6 states and 639 transitions. [2023-08-30 15:50:34,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 317 transitions, 4474 flow [2023-08-30 15:50:34,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 317 transitions, 4396 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-30 15:50:34,764 INFO L231 Difference]: Finished difference. Result has 148 places, 293 transitions, 3847 flow [2023-08-30 15:50:34,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3847, PETRI_PLACES=148, PETRI_TRANSITIONS=293} [2023-08-30 15:50:34,765 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2023-08-30 15:50:34,765 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 293 transitions, 3847 flow [2023-08-30 15:50:34,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:34,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:34,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:34,966 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,SelfDestructingSolverStorable12 [2023-08-30 15:50:34,967 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:34,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash -840121789, now seen corresponding path program 1 times [2023-08-30 15:50:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:34,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556013709] [2023-08-30 15:50:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:35,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556013709] [2023-08-30 15:50:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556013709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:35,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366208621] [2023-08-30 15:50:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:35,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:35,096 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) [2023-08-30 15:50:35,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:50:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:50:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:35,270 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 130 treesize of output 98 [2023-08-30 15:50:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:35,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366208621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 15:50:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92654184] [2023-08-30 15:50:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:50:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:50:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 15:50:35,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 273 [2023-08-30 15:50:35,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 293 transitions, 3847 flow. Second operand has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:35,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:35,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 273 [2023-08-30 15:50:35,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:36,095 INFO L130 PetriNetUnfolder]: 3166/5294 cut-off events. [2023-08-30 15:50:36,095 INFO L131 PetriNetUnfolder]: For 124220/124742 co-relation queries the response was YES. [2023-08-30 15:50:36,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41057 conditions, 5294 events. 3166/5294 cut-off events. For 124220/124742 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34164 event pairs, 556 based on Foata normal form. 304/5503 useless extension candidates. Maximal degree in co-relation 40993. Up to 2550 conditions per place. [2023-08-30 15:50:36,137 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 199 selfloop transitions, 85 changer transitions 22/325 dead transitions. [2023-08-30 15:50:36,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 325 transitions, 5127 flow [2023-08-30 15:50:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:50:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:50:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-08-30 15:50:36,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633699633699634 [2023-08-30 15:50:36,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-08-30 15:50:36,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-08-30 15:50:36,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:36,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-08-30 15:50:36,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:36,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:36,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:36,143 INFO L175 Difference]: Start difference. First operand has 148 places, 293 transitions, 3847 flow. Second operand 4 states and 506 transitions. [2023-08-30 15:50:36,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 325 transitions, 5127 flow [2023-08-30 15:50:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 325 transitions, 4918 flow, removed 40 selfloop flow, removed 10 redundant places. [2023-08-30 15:50:36,538 INFO L231 Difference]: Finished difference. Result has 139 places, 264 transitions, 3813 flow [2023-08-30 15:50:36,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3813, PETRI_PLACES=139, PETRI_TRANSITIONS=264} [2023-08-30 15:50:36,539 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2023-08-30 15:50:36,539 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 264 transitions, 3813 flow [2023-08-30 15:50:36,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:36,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:36,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:36,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:36,740 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,SelfDestructingSolverStorable13 [2023-08-30 15:50:36,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:36,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash -464822803, now seen corresponding path program 2 times [2023-08-30 15:50:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:36,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426005593] [2023-08-30 15:50:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:37,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426005593] [2023-08-30 15:50:37,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426005593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146125352] [2023-08-30 15:50:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:50:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:37,641 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) [2023-08-30 15:50:37,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:50:37,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:50:37,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:37,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:50:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:37,915 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 18 treesize of output 20 [2023-08-30 15:50:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:37,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:37,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146125352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:37,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:37,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 15:50:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451511380] [2023-08-30 15:50:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:37,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:50:37,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:50:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:50:38,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-08-30 15:50:38,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 264 transitions, 3813 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:38,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:38,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-08-30 15:50:38,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:38,797 INFO L130 PetriNetUnfolder]: 2910/4963 cut-off events. [2023-08-30 15:50:38,798 INFO L131 PetriNetUnfolder]: For 92159/92304 co-relation queries the response was YES. [2023-08-30 15:50:38,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 4963 events. 2910/4963 cut-off events. For 92159/92304 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31966 event pairs, 568 based on Foata normal form. 115/5075 useless extension candidates. Maximal degree in co-relation 38490. Up to 3087 conditions per place. [2023-08-30 15:50:38,832 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 161 selfloop transitions, 103 changer transitions 0/278 dead transitions. [2023-08-30 15:50:38,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 278 transitions, 4479 flow [2023-08-30 15:50:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:50:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:50:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 638 transitions. [2023-08-30 15:50:38,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894993894993895 [2023-08-30 15:50:38,833 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 638 transitions. [2023-08-30 15:50:38,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 638 transitions. [2023-08-30 15:50:38,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:38,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 638 transitions. [2023-08-30 15:50:38,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:38,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:38,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:38,838 INFO L175 Difference]: Start difference. First operand has 139 places, 264 transitions, 3813 flow. Second operand 6 states and 638 transitions. [2023-08-30 15:50:38,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 278 transitions, 4479 flow [2023-08-30 15:50:39,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 278 transitions, 4469 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 15:50:39,032 INFO L231 Difference]: Finished difference. Result has 144 places, 255 transitions, 4023 flow [2023-08-30 15:50:39,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4023, PETRI_PLACES=144, PETRI_TRANSITIONS=255} [2023-08-30 15:50:39,033 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2023-08-30 15:50:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 255 transitions, 4023 flow [2023-08-30 15:50:39,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:39,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:39,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:39,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:39,233 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,SelfDestructingSolverStorable14 [2023-08-30 15:50:39,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:39,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash -273968203, now seen corresponding path program 2 times [2023-08-30 15:50:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:39,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42063648] [2023-08-30 15:50:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:39,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42063648] [2023-08-30 15:50:39,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42063648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473294497] [2023-08-30 15:50:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:50:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:39,353 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) [2023-08-30 15:50:39,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:50:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:50:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:50:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473294497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:39,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:39,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 15:50:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81694967] [2023-08-30 15:50:39,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:50:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:50:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-30 15:50:39,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 273 [2023-08-30 15:50:39,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 255 transitions, 4023 flow. Second operand has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:39,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:39,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 273 [2023-08-30 15:50:39,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:40,404 INFO L130 PetriNetUnfolder]: 1876/3327 cut-off events. [2023-08-30 15:50:40,405 INFO L131 PetriNetUnfolder]: For 66275/66543 co-relation queries the response was YES. [2023-08-30 15:50:40,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 3327 events. 1876/3327 cut-off events. For 66275/66543 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21032 event pairs, 782 based on Foata normal form. 93/3372 useless extension candidates. Maximal degree in co-relation 26204. Up to 2445 conditions per place. [2023-08-30 15:50:40,428 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 138 selfloop transitions, 3 changer transitions 81/230 dead transitions. [2023-08-30 15:50:40,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 230 transitions, 4027 flow [2023-08-30 15:50:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:50:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:50:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 811 transitions. [2023-08-30 15:50:40,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424385138670853 [2023-08-30 15:50:40,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 811 transitions. [2023-08-30 15:50:40,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 811 transitions. [2023-08-30 15:50:40,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:40,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 811 transitions. [2023-08-30 15:50:40,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.85714285714286) internal successors, (811), 7 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:40,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:40,434 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:40,434 INFO L175 Difference]: Start difference. First operand has 144 places, 255 transitions, 4023 flow. Second operand 7 states and 811 transitions. [2023-08-30 15:50:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 230 transitions, 4027 flow [2023-08-30 15:50:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 230 transitions, 3810 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 15:50:40,535 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 2308 flow [2023-08-30 15:50:40,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2023-08-30 15:50:40,535 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 101 predicate places. [2023-08-30 15:50:40,536 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 2308 flow [2023-08-30 15:50:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:40,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:40,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:40,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:40,736 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,SelfDestructingSolverStorable15 [2023-08-30 15:50:40,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:40,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1047368430, now seen corresponding path program 1 times [2023-08-30 15:50:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011518030] [2023-08-30 15:50:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011518030] [2023-08-30 15:50:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011518030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960345266] [2023-08-30 15:50:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:41,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:41,581 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) [2023-08-30 15:50:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:50:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:41,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:50:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:41,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:41,949 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 60 treesize of output 44 [2023-08-30 15:50:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:42,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960345266] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:42,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:50:42,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 15:50:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496860029] [2023-08-30 15:50:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:42,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:50:42,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:42,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:50:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:50:42,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 273 [2023-08-30 15:50:42,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 2308 flow. Second operand has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:42,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:42,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 273 [2023-08-30 15:50:42,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:43,094 INFO L130 PetriNetUnfolder]: 2410/3947 cut-off events. [2023-08-30 15:50:43,094 INFO L131 PetriNetUnfolder]: For 65497/65781 co-relation queries the response was YES. [2023-08-30 15:50:43,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29651 conditions, 3947 events. 2410/3947 cut-off events. For 65497/65781 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23425 event pairs, 559 based on Foata normal form. 28/3887 useless extension candidates. Maximal degree in co-relation 29592. Up to 2361 conditions per place. [2023-08-30 15:50:43,122 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 124 selfloop transitions, 87 changer transitions 1/214 dead transitions. [2023-08-30 15:50:43,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 214 transitions, 3684 flow [2023-08-30 15:50:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:50:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:50:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 758 transitions. [2023-08-30 15:50:43,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39665096807953953 [2023-08-30 15:50:43,124 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 758 transitions. [2023-08-30 15:50:43,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 758 transitions. [2023-08-30 15:50:43,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:43,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 758 transitions. [2023-08-30 15:50:43,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:43,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:43,128 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:43,128 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 2308 flow. Second operand 7 states and 758 transitions. [2023-08-30 15:50:43,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 214 transitions, 3684 flow [2023-08-30 15:50:43,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 214 transitions, 3516 flow, removed 56 selfloop flow, removed 16 redundant places. [2023-08-30 15:50:43,241 INFO L231 Difference]: Finished difference. Result has 112 places, 185 transitions, 3159 flow [2023-08-30 15:50:43,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3159, PETRI_PLACES=112, PETRI_TRANSITIONS=185} [2023-08-30 15:50:43,241 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2023-08-30 15:50:43,242 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 185 transitions, 3159 flow [2023-08-30 15:50:43,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:43,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:43,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:43,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 15:50:43,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:43,448 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:43,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456349, now seen corresponding path program 1 times [2023-08-30 15:50:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:43,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338581339] [2023-08-30 15:50:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338581339] [2023-08-30 15:50:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338581339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366169210] [2023-08-30 15:50:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:44,253 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) [2023-08-30 15:50:44,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 15:50:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:50:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:44,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:44,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:44,549 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 61 treesize of output 45 [2023-08-30 15:50:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366169210] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:44,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:50:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 17 [2023-08-30 15:50:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282849257] [2023-08-30 15:50:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:44,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:50:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:50:44,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:50:44,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-08-30 15:50:44,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 185 transitions, 3159 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:44,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:44,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-08-30 15:50:44,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:45,459 INFO L130 PetriNetUnfolder]: 1936/3336 cut-off events. [2023-08-30 15:50:45,459 INFO L131 PetriNetUnfolder]: For 59955/60082 co-relation queries the response was YES. [2023-08-30 15:50:45,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26289 conditions, 3336 events. 1936/3336 cut-off events. For 59955/60082 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20537 event pairs, 200 based on Foata normal form. 175/3507 useless extension candidates. Maximal degree in co-relation 26237. Up to 1528 conditions per place. [2023-08-30 15:50:45,483 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 105 selfloop transitions, 100 changer transitions 4/216 dead transitions. [2023-08-30 15:50:45,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 3933 flow [2023-08-30 15:50:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:50:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:50:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2023-08-30 15:50:45,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40397697540554683 [2023-08-30 15:50:45,485 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2023-08-30 15:50:45,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2023-08-30 15:50:45,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:45,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2023-08-30 15:50:45,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:45,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:45,488 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:45,489 INFO L175 Difference]: Start difference. First operand has 112 places, 185 transitions, 3159 flow. Second operand 7 states and 772 transitions. [2023-08-30 15:50:45,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 3933 flow [2023-08-30 15:50:45,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 216 transitions, 3745 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-30 15:50:45,566 INFO L231 Difference]: Finished difference. Result has 116 places, 182 transitions, 3140 flow [2023-08-30 15:50:45,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=116, PETRI_TRANSITIONS=182} [2023-08-30 15:50:45,566 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 79 predicate places. [2023-08-30 15:50:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 182 transitions, 3140 flow [2023-08-30 15:50:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:45,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:45,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:45,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:45,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 15:50:45,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:45,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456350, now seen corresponding path program 2 times [2023-08-30 15:50:45,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:45,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785465996] [2023-08-30 15:50:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:46,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785465996] [2023-08-30 15:50:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785465996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136039689] [2023-08-30 15:50:46,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:50:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:46,231 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) [2023-08-30 15:50:46,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 15:50:46,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:50:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:50:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:46,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:50:46,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136039689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:50:46,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:50:46,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 15:50:46,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529226352] [2023-08-30 15:50:46,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:50:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:50:46,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:50:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:50:46,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-30 15:50:46,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 182 transitions, 3140 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:46,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:46,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-30 15:50:46,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:46,958 INFO L130 PetriNetUnfolder]: 1864/3222 cut-off events. [2023-08-30 15:50:46,958 INFO L131 PetriNetUnfolder]: For 50599/50686 co-relation queries the response was YES. [2023-08-30 15:50:46,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24637 conditions, 3222 events. 1864/3222 cut-off events. For 50599/50686 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19471 event pairs, 364 based on Foata normal form. 135/3353 useless extension candidates. Maximal degree in co-relation 24585. Up to 2207 conditions per place. [2023-08-30 15:50:46,980 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 94 selfloop transitions, 89 changer transitions 0/190 dead transitions. [2023-08-30 15:50:46,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 3518 flow [2023-08-30 15:50:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:50:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:50:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-30 15:50:46,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2023-08-30 15:50:46,981 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-30 15:50:46,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-30 15:50:46,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:46,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-30 15:50:46,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:46,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:46,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:46,983 INFO L175 Difference]: Start difference. First operand has 116 places, 182 transitions, 3140 flow. Second operand 5 states and 555 transitions. [2023-08-30 15:50:46,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 3518 flow [2023-08-30 15:50:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 3386 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 15:50:47,038 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 3072 flow [2023-08-30 15:50:47,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3072, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2023-08-30 15:50:47,039 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-08-30 15:50:47,039 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 3072 flow [2023-08-30 15:50:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:47,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:47,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:47,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:47,240 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:47,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash -665209678, now seen corresponding path program 1 times [2023-08-30 15:50:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413528396] [2023-08-30 15:50:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:47,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:47,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413528396] [2023-08-30 15:50:47,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413528396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:47,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313144388] [2023-08-30 15:50:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:47,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:47,985 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) [2023-08-30 15:50:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 15:50:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:50:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:48,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:48,810 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:50:48,811 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 212 treesize of output 183 [2023-08-30 15:50:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313144388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:49,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 15:50:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018235070] [2023-08-30 15:50:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:50:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:50:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-08-30 15:50:50,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-08-30 15:50:50,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 3072 flow. Second operand has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:50,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:50,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-08-30 15:50:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:53,261 INFO L130 PetriNetUnfolder]: 3996/6751 cut-off events. [2023-08-30 15:50:53,262 INFO L131 PetriNetUnfolder]: For 109147/109250 co-relation queries the response was YES. [2023-08-30 15:50:53,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49971 conditions, 6751 events. 3996/6751 cut-off events. For 109147/109250 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 46285 event pairs, 411 based on Foata normal form. 272/7018 useless extension candidates. Maximal degree in co-relation 49920. Up to 3250 conditions per place. [2023-08-30 15:50:53,309 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 241 selfloop transitions, 253 changer transitions 9/510 dead transitions. [2023-08-30 15:50:53,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 510 transitions, 8906 flow [2023-08-30 15:50:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:50:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:50:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2946 transitions. [2023-08-30 15:50:53,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597069597069597 [2023-08-30 15:50:53,313 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2946 transitions. [2023-08-30 15:50:53,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2946 transitions. [2023-08-30 15:50:53,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:53,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2946 transitions. [2023-08-30 15:50:53,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 98.2) internal successors, (2946), 30 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:53,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:53,325 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:53,325 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 3072 flow. Second operand 30 states and 2946 transitions. [2023-08-30 15:50:53,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 510 transitions, 8906 flow [2023-08-30 15:50:53,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 510 transitions, 8736 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:50:53,405 INFO L231 Difference]: Finished difference. Result has 161 places, 357 transitions, 7220 flow [2023-08-30 15:50:53,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7220, PETRI_PLACES=161, PETRI_TRANSITIONS=357} [2023-08-30 15:50:53,406 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2023-08-30 15:50:53,406 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 357 transitions, 7220 flow [2023-08-30 15:50:53,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:53,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:53,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:53,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:53,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:53,607 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:53,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash -665209679, now seen corresponding path program 3 times [2023-08-30 15:50:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047733778] [2023-08-30 15:50:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047733778] [2023-08-30 15:50:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047733778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180133308] [2023-08-30 15:50:54,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:50:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:54,355 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) [2023-08-30 15:50:54,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 15:50:54,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:50:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 15:50:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:54,612 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 [2023-08-30 15:50:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:54,689 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 20 treesize of output 22 [2023-08-30 15:50:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:54,763 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 20 treesize of output 22 [2023-08-30 15:50:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:56,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:56,134 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 90 treesize of output 66 [2023-08-30 15:50:56,186 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-08-30 15:50:56,186 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 397 treesize of output 381 [2023-08-30 15:50:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:50:56,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:56,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 104 [2023-08-30 15:50:56,246 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 15:50:56,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 111 treesize of output 91 [2023-08-30 15:50:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:58,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180133308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:58,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:58,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-30 15:50:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778667670] [2023-08-30 15:50:58,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:58,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:50:58,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:50:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=742, Unknown=2, NotChecked=0, Total=870 [2023-08-30 15:50:59,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 15:50:59,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 357 transitions, 7220 flow. Second operand has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:59,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:59,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 15:50:59,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:51:01,708 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 [0] [2023-08-30 15:51:18,320 INFO L130 PetriNetUnfolder]: 11336/18013 cut-off events. [2023-08-30 15:51:18,321 INFO L131 PetriNetUnfolder]: For 396718/396718 co-relation queries the response was YES. [2023-08-30 15:51:18,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145413 conditions, 18013 events. 11336/18013 cut-off events. For 396718/396718 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 126427 event pairs, 1350 based on Foata normal form. 370/18383 useless extension candidates. Maximal degree in co-relation 145342. Up to 8164 conditions per place. [2023-08-30 15:51:18,482 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 617 selfloop transitions, 909 changer transitions 25/1551 dead transitions. [2023-08-30 15:51:18,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1551 transitions, 29923 flow [2023-08-30 15:51:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 15:51:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 15:51:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 7661 transitions. [2023-08-30 15:51:18,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806227106227106 [2023-08-30 15:51:18,492 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 7661 transitions. [2023-08-30 15:51:18,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 7661 transitions. [2023-08-30 15:51:18,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:51:18,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 7661 transitions. [2023-08-30 15:51:18,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 76.61) internal successors, (7661), 100 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:18,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:18,533 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:18,533 INFO L175 Difference]: Start difference. First operand has 161 places, 357 transitions, 7220 flow. Second operand 100 states and 7661 transitions. [2023-08-30 15:51:18,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1551 transitions, 29923 flow [2023-08-30 15:51:20,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1551 transitions, 28111 flow, removed 839 selfloop flow, removed 4 redundant places. [2023-08-30 15:51:20,172 INFO L231 Difference]: Finished difference. Result has 312 places, 1175 transitions, 24915 flow [2023-08-30 15:51:20,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=24915, PETRI_PLACES=312, PETRI_TRANSITIONS=1175} [2023-08-30 15:51:20,173 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 275 predicate places. [2023-08-30 15:51:20,173 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1175 transitions, 24915 flow [2023-08-30 15:51:20,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:20,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:51:20,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:51:20,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 15:51:20,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:20,375 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:51:20,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:51:20,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1541597126, now seen corresponding path program 2 times [2023-08-30 15:51:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:51:20,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908348109] [2023-08-30 15:51:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:51:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:51:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:51:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:51:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908348109] [2023-08-30 15:51:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908348109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:51:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759529884] [2023-08-30 15:51:21,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:51:21,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:51:21,180 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) [2023-08-30 15:51:21,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 15:51:21,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:51:21,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:51:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 15:51:21,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:51:21,389 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 [2023-08-30 15:51:21,434 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 [2023-08-30 15:51:21,481 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 [2023-08-30 15:51:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:21,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:51:23,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:51:23,423 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 153 treesize of output 105 [2023-08-30 15:51:23,451 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-08-30 15:51:23,451 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 715 treesize of output 646 [2023-08-30 15:51:23,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:51:23,473 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:51:23,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:51:23,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:51:23,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:51:23,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2023-08-30 15:51:23,503 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-08-30 15:51:23,503 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 213 treesize of output 159 [2023-08-30 15:51:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759529884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:51:23,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:51:23,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 15:51:23,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589931084] [2023-08-30 15:51:23,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:51:23,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 15:51:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:51:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 15:51:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=688, Unknown=4, NotChecked=0, Total=930 [2023-08-30 15:51:24,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 15:51:24,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1175 transitions, 24915 flow. Second operand has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:24,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:51:24,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 15:51:24,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:51:38,455 INFO L130 PetriNetUnfolder]: 13877/22547 cut-off events. [2023-08-30 15:51:38,455 INFO L131 PetriNetUnfolder]: For 1803148/1803148 co-relation queries the response was YES. [2023-08-30 15:51:38,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261393 conditions, 22547 events. 13877/22547 cut-off events. For 1803148/1803148 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 166399 event pairs, 1481 based on Foata normal form. 328/22875 useless extension candidates. Maximal degree in co-relation 261266. Up to 10481 conditions per place. [2023-08-30 15:51:38,822 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 804 selfloop transitions, 1214 changer transitions 18/2036 dead transitions. [2023-08-30 15:51:38,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 2036 transitions, 46423 flow [2023-08-30 15:51:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 15:51:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 15:51:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3154 transitions. [2023-08-30 15:51:38,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28178325739301346 [2023-08-30 15:51:38,827 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3154 transitions. [2023-08-30 15:51:38,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3154 transitions. [2023-08-30 15:51:38,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:51:38,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3154 transitions. [2023-08-30 15:51:38,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.92682926829268) internal successors, (3154), 41 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:38,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:38,842 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:38,843 INFO L175 Difference]: Start difference. First operand has 312 places, 1175 transitions, 24915 flow. Second operand 41 states and 3154 transitions. [2023-08-30 15:51:38,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 2036 transitions, 46423 flow [2023-08-30 15:51:47,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 2036 transitions, 40419 flow, removed 2947 selfloop flow, removed 13 redundant places. [2023-08-30 15:51:47,881 INFO L231 Difference]: Finished difference. Result has 360 places, 1774 transitions, 37580 flow [2023-08-30 15:51:47,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=20620, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=37580, PETRI_PLACES=360, PETRI_TRANSITIONS=1774} [2023-08-30 15:51:47,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 323 predicate places. [2023-08-30 15:51:47,882 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1774 transitions, 37580 flow [2023-08-30 15:51:47,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:47,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:51:47,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:51:47,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 15:51:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:48,083 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:51:48,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:51:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1296655661, now seen corresponding path program 4 times [2023-08-30 15:51:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:51:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457907988] [2023-08-30 15:51:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:51:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:51:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:51:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:48,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:51:48,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457907988] [2023-08-30 15:51:48,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457907988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:51:48,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644438577] [2023-08-30 15:51:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:51:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:51:48,721 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) [2023-08-30 15:51:48,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 15:51:48,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:51:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:51:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 15:51:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:51:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:51:49,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:51:49,276 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:51:49,277 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 213 treesize of output 184 [2023-08-30 15:51:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:51:49,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644438577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:51:49,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:51:49,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2023-08-30 15:51:49,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979901190] [2023-08-30 15:51:49,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:51:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:51:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:51:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:51:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:51:50,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 273 [2023-08-30 15:51:50,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1774 transitions, 37580 flow. Second operand has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:50,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:51:50,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 273 [2023-08-30 15:51:50,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:52:04,668 INFO L130 PetriNetUnfolder]: 16768/27367 cut-off events. [2023-08-30 15:52:04,668 INFO L131 PetriNetUnfolder]: For 2419565/2423808 co-relation queries the response was YES. [2023-08-30 15:52:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315667 conditions, 27367 events. 16768/27367 cut-off events. For 2419565/2423808 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 217013 event pairs, 4196 based on Foata normal form. 477/27189 useless extension candidates. Maximal degree in co-relation 315518. Up to 15258 conditions per place. [2023-08-30 15:52:05,148 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 1664 selfloop transitions, 671 changer transitions 31/2422 dead transitions. [2023-08-30 15:52:05,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2422 transitions, 53868 flow [2023-08-30 15:52:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 15:52:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 15:52:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3091 transitions. [2023-08-30 15:52:05,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652369136240104 [2023-08-30 15:52:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3091 transitions. [2023-08-30 15:52:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3091 transitions. [2023-08-30 15:52:05,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:52:05,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3091 transitions. [2023-08-30 15:52:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.70967741935483) internal successors, (3091), 31 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:05,162 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:05,162 INFO L175 Difference]: Start difference. First operand has 360 places, 1774 transitions, 37580 flow. Second operand 31 states and 3091 transitions. [2023-08-30 15:52:05,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2422 transitions, 53868 flow [2023-08-30 15:52:19,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 2422 transitions, 51940 flow, removed 909 selfloop flow, removed 7 redundant places. [2023-08-30 15:52:19,134 INFO L231 Difference]: Finished difference. Result has 392 places, 2068 transitions, 44217 flow [2023-08-30 15:52:19,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=35849, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=44217, PETRI_PLACES=392, PETRI_TRANSITIONS=2068} [2023-08-30 15:52:19,136 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 355 predicate places. [2023-08-30 15:52:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 2068 transitions, 44217 flow [2023-08-30 15:52:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:19,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:52:19,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:52:19,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 15:52:19,337 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,SelfDestructingSolverStorable22 [2023-08-30 15:52:19,337 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:52:19,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:52:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1628308683, now seen corresponding path program 1 times [2023-08-30 15:52:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:52:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149349347] [2023-08-30 15:52:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:52:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:52:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:52:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:52:20,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:52:20,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149349347] [2023-08-30 15:52:20,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149349347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:52:20,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741373494] [2023-08-30 15:52:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:52:20,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:52:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:52:20,354 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) [2023-08-30 15:52:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 15:52:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:52:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 15:52:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:52:20,596 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 [2023-08-30 15:52:20,654 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 18 [2023-08-30 15:52:20,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:52:20,716 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 [2023-08-30 15:52:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:52:20,783 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 [2023-08-30 15:52:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:52:21,180 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 29 treesize of output 29 [2023-08-30 15:52:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:52:21,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:52:22,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:52:22,252 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 158 treesize of output 103 [2023-08-30 15:52:22,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:52:22,292 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 2061 treesize of output 1908 [2023-08-30 15:52:22,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 104 treesize of output 76 [2023-08-30 15:52:22,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:52:22,358 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 314 treesize of output 286 [2023-08-30 15:52:22,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:52:22,391 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 250 treesize of output 254 [2023-08-30 15:52:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:52:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741373494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:52:29,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:52:29,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 15:52:29,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038879905] [2023-08-30 15:52:29,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:52:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:52:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:52:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:52:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=884, Unknown=8, NotChecked=0, Total=1056 [2023-08-30 15:52:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 15:52:29,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 2068 transitions, 44217 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:29,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:52:29,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 15:52:29,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:52:34,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:53:24,338 INFO L130 PetriNetUnfolder]: 29719/47614 cut-off events. [2023-08-30 15:53:24,339 INFO L131 PetriNetUnfolder]: For 5022486/5022486 co-relation queries the response was YES. [2023-08-30 15:53:25,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596792 conditions, 47614 events. 29719/47614 cut-off events. For 5022486/5022486 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 382398 event pairs, 3402 based on Foata normal form. 2091/49705 useless extension candidates. Maximal degree in co-relation 596633. Up to 21767 conditions per place. [2023-08-30 15:53:25,464 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 2080 selfloop transitions, 2442 changer transitions 93/4615 dead transitions. [2023-08-30 15:53:25,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 4615 transitions, 110109 flow [2023-08-30 15:53:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-30 15:53:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-30 15:53:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4644 transitions. [2023-08-30 15:53:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27001569858712715 [2023-08-30 15:53:25,470 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4644 transitions. [2023-08-30 15:53:25,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4644 transitions. [2023-08-30 15:53:25,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:53:25,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4644 transitions. [2023-08-30 15:53:25,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.71428571428571) internal successors, (4644), 63 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:25,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 273.0) internal successors, (17472), 64 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:25,493 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 273.0) internal successors, (17472), 64 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:25,493 INFO L175 Difference]: Start difference. First operand has 392 places, 2068 transitions, 44217 flow. Second operand 63 states and 4644 transitions. [2023-08-30 15:53:25,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 4615 transitions, 110109 flow [2023-08-30 15:54:03,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 4615 transitions, 107471 flow, removed 960 selfloop flow, removed 9 redundant places. [2023-08-30 15:54:03,617 INFO L231 Difference]: Finished difference. Result has 472 places, 3564 transitions, 87110 flow [2023-08-30 15:54:03,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=40092, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=87110, PETRI_PLACES=472, PETRI_TRANSITIONS=3564} [2023-08-30 15:54:03,619 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 435 predicate places. [2023-08-30 15:54:03,619 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 3564 transitions, 87110 flow [2023-08-30 15:54:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:54:03,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:54:03,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:54:03,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 15:54:03,820 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,SelfDestructingSolverStorable23 [2023-08-30 15:54:03,820 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:54:03,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:54:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 13853192, now seen corresponding path program 1 times [2023-08-30 15:54:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:54:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960168312] [2023-08-30 15:54:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:54:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:54:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:54:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:54:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:54:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960168312] [2023-08-30 15:54:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960168312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:54:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247463303] [2023-08-30 15:54:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:54:04,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:54:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:54:04,620 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) [2023-08-30 15:54:04,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 15:54:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:54:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:54:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:54:04,814 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 [2023-08-30 15:54:04,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:54:04,879 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 20 treesize of output 22 [2023-08-30 15:54:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:54:05,011 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 20 treesize of output 22 [2023-08-30 15:54:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:54:05,259 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 32 treesize of output 32 [2023-08-30 15:54:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:54:05,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:54:08,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:54:08,159 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 97 treesize of output 73 [2023-08-30 15:54:08,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:54:08,183 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 1051 treesize of output 1011 [2023-08-30 15:54:08,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:54:08,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 147 [2023-08-30 15:54:08,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:54:08,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 128 [2023-08-30 15:54:09,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:54:09,280 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 110 treesize of output 58 [2023-08-30 15:54:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:54:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247463303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:54:09,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:54:09,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 15:54:09,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422875981] [2023-08-30 15:54:09,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:54:09,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:54:09,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:54:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:54:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=908, Unknown=6, NotChecked=0, Total=1056 [2023-08-30 15:54:11,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 15:54:11,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 3564 transitions, 87110 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:54:11,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:54:11,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 15:54:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:54:25,544 WARN L222 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 119 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:54:28,442 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] [2023-08-30 15:54:30,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:54:32,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:54:45,302 WARN L222 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 136 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:54:48,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:54:50,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:54:52,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:55:00,970 WARN L222 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:55:03,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:55:05,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:55:13,697 WARN L222 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:55:16,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:55:19,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:55:25,521 WARN L222 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:55:36,021 WARN L222 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 118 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:55:38,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:55:57,359 WARN L222 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:56:00,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:56:11,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:56:13,990 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] [2023-08-30 15:57:05,700 INFO L130 PetriNetUnfolder]: 35783/57343 cut-off events. [2023-08-30 15:57:05,700 INFO L131 PetriNetUnfolder]: For 5647061/5647061 co-relation queries the response was YES. [2023-08-30 15:57:07,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753747 conditions, 57343 events. 35783/57343 cut-off events. For 5647061/5647061 co-relation queries the response was YES. Maximal size of possible extension queue 2727. Compared 474845 event pairs, 9015 based on Foata normal form. 784/58127 useless extension candidates. Maximal degree in co-relation 753563. Up to 35405 conditions per place. [2023-08-30 15:57:07,419 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 3136 selfloop transitions, 1936 changer transitions 82/5154 dead transitions. [2023-08-30 15:57:07,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 5154 transitions, 132449 flow [2023-08-30 15:57:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 15:57:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 15:57:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4338 transitions. [2023-08-30 15:57:07,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693238964425405 [2023-08-30 15:57:07,424 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4338 transitions. [2023-08-30 15:57:07,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4338 transitions. [2023-08-30 15:57:07,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:57:07,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4338 transitions. [2023-08-30 15:57:07,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 73.52542372881356) internal successors, (4338), 59 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:57:07,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 273.0) internal successors, (16380), 60 states have internal predecessors, (16380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:57:07,443 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 273.0) internal successors, (16380), 60 states have internal predecessors, (16380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:57:07,443 INFO L175 Difference]: Start difference. First operand has 472 places, 3564 transitions, 87110 flow. Second operand 59 states and 4338 transitions. [2023-08-30 15:57:07,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 5154 transitions, 132449 flow [2023-08-30 15:58:23,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 5154 transitions, 122364 flow, removed 5022 selfloop flow, removed 9 redundant places. [2023-08-30 15:58:23,988 INFO L231 Difference]: Finished difference. Result has 550 places, 4435 transitions, 105789 flow [2023-08-30 15:58:23,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=78874, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=105789, PETRI_PLACES=550, PETRI_TRANSITIONS=4435} [2023-08-30 15:58:23,991 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 513 predicate places. [2023-08-30 15:58:23,992 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 4435 transitions, 105789 flow [2023-08-30 15:58:23,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:58:23,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:58:23,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:58:24,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 15:58:24,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:24,201 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:58:24,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:58:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 240982344, now seen corresponding path program 2 times [2023-08-30 15:58:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:58:24,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336157256] [2023-08-30 15:58:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:58:24,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:58:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:58:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:58:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336157256] [2023-08-30 15:58:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336157256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:58:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005569134] [2023-08-30 15:58:25,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:58:25,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:58:25,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:58:25,002 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) [2023-08-30 15:58:25,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 15:58:25,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:58:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:58:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 15:58:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:58:25,235 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 [2023-08-30 15:58:25,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:58:25,302 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 [2023-08-30 15:58:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:58:25,361 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 [2023-08-30 15:58:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:58:25,672 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 27 treesize of output 27 [2023-08-30 15:58:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:25,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:58:26,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:26,430 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 94 treesize of output 70 [2023-08-30 15:58:26,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:26,469 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 4011 treesize of output 3639 [2023-08-30 15:58:26,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 211 treesize of output 183 [2023-08-30 15:58:26,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:26,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 247 treesize of output 215 [2023-08-30 15:58:26,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:58:26,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 134 treesize of output 127 [2023-08-30 15:58:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:58:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005569134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:58:28,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:58:28,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-30 15:58:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414326548] [2023-08-30 15:58:28,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:58:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:58:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:58:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:58:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=970, Unknown=4, NotChecked=0, Total=1122 [2023-08-30 15:58:30,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 15:58:30,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 4435 transitions, 105789 flow. Second operand has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:58:30,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:58:30,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 15:58:30,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:58:33,539 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] [2023-08-30 15:58:36,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:38,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:40,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:42,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:48,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:50,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:52,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:58:54,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:01,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:05,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:07,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:17,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:19,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:59:21,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:00:39,290 INFO L130 PetriNetUnfolder]: 49538/80636 cut-off events. [2023-08-30 16:00:39,290 INFO L131 PetriNetUnfolder]: For 8831818/8831818 co-relation queries the response was YES. [2023-08-30 16:00:41,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073080 conditions, 80636 events. 49538/80636 cut-off events. For 8831818/8831818 co-relation queries the response was YES. Maximal size of possible extension queue 3733. Compared 707492 event pairs, 5669 based on Foata normal form. 4789/85425 useless extension candidates. Maximal degree in co-relation 1072868. Up to 34840 conditions per place. [2023-08-30 16:00:42,113 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 2618 selfloop transitions, 4671 changer transitions 48/7337 dead transitions. [2023-08-30 16:00:42,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 7337 transitions, 182712 flow [2023-08-30 16:00:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 16:00:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 16:00:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4174 transitions. [2023-08-30 16:00:42,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2730245944531659 [2023-08-30 16:00:42,117 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4174 transitions. [2023-08-30 16:00:42,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4174 transitions. [2023-08-30 16:00:42,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:00:42,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4174 transitions. [2023-08-30 16:00:42,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 74.53571428571429) internal successors, (4174), 56 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:00:42,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:00:42,132 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:00:42,132 INFO L175 Difference]: Start difference. First operand has 550 places, 4435 transitions, 105789 flow. Second operand 56 states and 4174 transitions. [2023-08-30 16:00:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 7337 transitions, 182712 flow [2023-08-30 16:02:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 7337 transitions, 179699 flow, removed 1393 selfloop flow, removed 22 redundant places. [2023-08-30 16:02:54,120 INFO L231 Difference]: Finished difference. Result has 612 places, 6475 transitions, 169616 flow [2023-08-30 16:02:54,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=94210, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=169616, PETRI_PLACES=612, PETRI_TRANSITIONS=6475} [2023-08-30 16:02:54,124 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 575 predicate places. [2023-08-30 16:02:54,124 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 6475 transitions, 169616 flow [2023-08-30 16:02:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:02:54,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:02:54,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:02:54,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 16:02:54,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:02:54,331 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 16:02:54,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:02:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1195930069, now seen corresponding path program 2 times [2023-08-30 16:02:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:02:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339245269] [2023-08-30 16:02:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:02:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:02:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:02:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:02:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:02:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339245269] [2023-08-30 16:02:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339245269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:02:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866061404] [2023-08-30 16:02:54,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:02:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:02:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:02:54,933 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) [2023-08-30 16:02:54,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 16:02:55,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:02:55,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:02:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 16:02:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:02:55,197 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 [2023-08-30 16:02:55,262 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 [2023-08-30 16:02:55,307 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 [2023-08-30 16:02:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:02:55,524 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 32 treesize of output 32 [2023-08-30 16:02:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:02:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:02:57,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:02:57,073 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 162 treesize of output 114 [2023-08-30 16:02:57,123 INFO L321 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-30 16:02:57,123 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 533 treesize of output 518 [2023-08-30 16:02:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:02:57,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 281 [2023-08-30 16:02:57,192 INFO L321 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-30 16:02:57,193 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 420 treesize of output 384 [2023-08-30 16:02:57,250 INFO L321 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-30 16:02:57,251 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 244 treesize of output 239 [2023-08-30 16:02:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:02:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866061404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:02:59,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:02:59,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 16:02:59,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291771166] [2023-08-30 16:02:59,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:02:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 16:02:59,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:02:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 16:02:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=824, Unknown=2, NotChecked=0, Total=1056 [2023-08-30 16:03:00,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 16:03:00,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 6475 transitions, 169616 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:03:00,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:03:00,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 16:03:00,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15