./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:37:12,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:37:12,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:37:12,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:37:12,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:37:12,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:37:12,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:37:12,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:37:12,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:37:12,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:37:12,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:37:12,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:37:12,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:37:12,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:37:12,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:37:12,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:37:12,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:37:12,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:37:12,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:37:12,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:37:12,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:37:12,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:37:12,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:37:12,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:37:12,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:37:12,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:37:12,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:37:12,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:37:12,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:37:12,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:37:12,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:37:12,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:37:12,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:37:12,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:37:12,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:37:12,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:37:12,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:37:12,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:37:12,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:37:12,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:37:12,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:37:12,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:37:12,968 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:37:12,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:37:12,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:37:12,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:37:12,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:37:12,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:37:12,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:37:12,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:37:12,970 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:37:12,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:37:12,971 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:37:12,971 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:37:12,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:37:12,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:37:12,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:37:12,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:37:12,973 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:37:12,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:37:12,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:37:12,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:37:12,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:37:12,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:37:12,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:37:12,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:37:12,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:37:12,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:37:12,975 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:37:12,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:37:13,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:37:13,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:37:13,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:37:13,282 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:37:13,282 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:37:13,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 11:37:14,478 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:37:14,658 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:37:14,659 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-30 11:37:14,667 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee284a42/b52b09a60c3d425ea4bbbca64088ff24/FLAG1d0e104d3 [2023-08-30 11:37:14,684 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee284a42/b52b09a60c3d425ea4bbbca64088ff24 [2023-08-30 11:37:14,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:37:14,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:37:14,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:37:14,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:37:14,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:37:14,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:14,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124c75df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14, skipping insertion in model container [2023-08-30 11:37:14,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:14,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:37:14,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:37:14,879 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-horseshoe.wvr.c[3424,3437] [2023-08-30 11:37:14,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:37:14,899 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:37:14,933 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-horseshoe.wvr.c[3424,3437] [2023-08-30 11:37:14,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:37:14,955 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:37:14,957 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:37:14,963 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:37:14,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14 WrapperNode [2023-08-30 11:37:14,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:37:14,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:37:14,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:37:14,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:37:14,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:14,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,023 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 278 [2023-08-30 11:37:15,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:37:15,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:37:15,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:37:15,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:37:15,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:37:15,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:37:15,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:37:15,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:37:15,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (1/1) ... [2023-08-30 11:37:15,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:37:15,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:15,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:37:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:37:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:37:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:37:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:37:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:37:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:37:15,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:37:15,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:37:15,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:37:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:37:15,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:37:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:37:15,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:37:15,146 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:37:15,278 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:37:15,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:37:15,646 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:37:15,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:37:15,823 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 11:37:15,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:37:15 BoogieIcfgContainer [2023-08-30 11:37:15,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:37:15,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:37:15,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:37:15,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:37:15,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:37:14" (1/3) ... [2023-08-30 11:37:15,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9d116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:37:15, skipping insertion in model container [2023-08-30 11:37:15,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:37:14" (2/3) ... [2023-08-30 11:37:15,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9d116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:37:15, skipping insertion in model container [2023-08-30 11:37:15,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:37:15" (3/3) ... [2023-08-30 11:37:15,834 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-30 11:37:15,841 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:37:15,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:37:15,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 11:37:15,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:37:15,948 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:37:15,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 239 transitions, 502 flow [2023-08-30 11:37:16,100 INFO L130 PetriNetUnfolder]: 18/236 cut-off events. [2023-08-30 11:37:16,100 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:37:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 18/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-08-30 11:37:16,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 239 transitions, 502 flow [2023-08-30 11:37:16,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 219 transitions, 456 flow [2023-08-30 11:37:16,122 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:37:16,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 219 transitions, 456 flow [2023-08-30 11:37:16,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 219 transitions, 456 flow [2023-08-30 11:37:16,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 219 transitions, 456 flow [2023-08-30 11:37:16,175 INFO L130 PetriNetUnfolder]: 17/219 cut-off events. [2023-08-30 11:37:16,175 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:37:16,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 219 events. 17/219 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-08-30 11:37:16,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 3440 [2023-08-30 11:37:23,858 INFO L134 LiptonReduction]: Checked pairs total: 7488 [2023-08-30 11:37:23,858 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-08-30 11:37:23,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:37:23,874 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;@4cb722cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:37:23,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 11:37:23,877 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:37:23,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:37:23,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:23,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:37:23,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:23,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash 35227, now seen corresponding path program 1 times [2023-08-30 11:37:23,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388340026] [2023-08-30 11:37:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388340026] [2023-08-30 11:37:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388340026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:24,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:24,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:37:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189874054] [2023-08-30 11:37:24,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:24,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 11:37:24,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:24,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:24,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 11:37:24,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:25,391 INFO L130 PetriNetUnfolder]: 7769/10041 cut-off events. [2023-08-30 11:37:25,392 INFO L131 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2023-08-30 11:37:25,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20476 conditions, 10041 events. 7769/10041 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 50096 event pairs, 4235 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 9182. Up to 4994 conditions per place. [2023-08-30 11:37:25,474 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 79 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 11:37:25,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 374 flow [2023-08-30 11:37:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-30 11:37:25,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48723404255319147 [2023-08-30 11:37:25,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-30 11:37:25,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-30 11:37:25,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:25,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-30 11:37:25,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:25,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:25,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:25,514 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 687 transitions. [2023-08-30 11:37:25,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 374 flow [2023-08-30 11:37:25,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 350 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 11:37:25,541 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 136 flow [2023-08-30 11:37:25,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-30 11:37:25,548 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-08-30 11:37:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 136 flow [2023-08-30 11:37:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:25,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:25,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:37:25,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:37:25,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:25,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1094125, now seen corresponding path program 1 times [2023-08-30 11:37:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:25,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834919206] [2023-08-30 11:37:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834919206] [2023-08-30 11:37:25,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834919206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:25,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:37:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585406717] [2023-08-30 11:37:25,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:25,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:25,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 11:37:25,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:25,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:25,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 11:37:25,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:26,691 INFO L130 PetriNetUnfolder]: 7777/10047 cut-off events. [2023-08-30 11:37:26,692 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 11:37:26,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20211 conditions, 10047 events. 7777/10047 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 50689 event pairs, 4236 based on Foata normal form. 0/3105 useless extension candidates. Maximal degree in co-relation 10094. Up to 9991 conditions per place. [2023-08-30 11:37:26,748 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 44 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 11:37:26,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 218 flow [2023-08-30 11:37:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 11:37:26,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-08-30 11:37:26,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 11:37:26,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 11:37:26,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:26,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 11:37:26,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:26,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:26,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:26,758 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 136 flow. Second operand 3 states and 632 transitions. [2023-08-30 11:37:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 218 flow [2023-08-30 11:37:26,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:37:26,760 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 122 flow [2023-08-30 11:37:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 11:37:26,761 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 11:37:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 122 flow [2023-08-30 11:37:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:26,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:37:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:37:26,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:26,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1094140, now seen corresponding path program 1 times [2023-08-30 11:37:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:26,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764400095] [2023-08-30 11:37:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764400095] [2023-08-30 11:37:26,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764400095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600410883] [2023-08-30 11:37:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:26,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:26,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:37:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:37:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:26,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:27,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600410883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:27,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:27,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:37:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802325152] [2023-08-30 11:37:27,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:37:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:37:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:37:27,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 11:37:27,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:27,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:27,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 11:37:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:29,479 INFO L130 PetriNetUnfolder]: 19409/25081 cut-off events. [2023-08-30 11:37:29,479 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 11:37:29,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50431 conditions, 25081 events. 19409/25081 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 137497 event pairs, 10586 based on Foata normal form. 0/7948 useless extension candidates. Maximal degree in co-relation 50423. Up to 4997 conditions per place. [2023-08-30 11:37:29,592 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 185 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2023-08-30 11:37:29,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 201 transitions, 866 flow [2023-08-30 11:37:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:37:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:37:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1380 transitions. [2023-08-30 11:37:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2023-08-30 11:37:29,597 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1380 transitions. [2023-08-30 11:37:29,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1380 transitions. [2023-08-30 11:37:29,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:29,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1380 transitions. [2023-08-30 11:37:29,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:29,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:29,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:29,606 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 122 flow. Second operand 6 states and 1380 transitions. [2023-08-30 11:37:29,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 201 transitions, 866 flow [2023-08-30 11:37:29,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 201 transitions, 865 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:29,610 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 214 flow [2023-08-30 11:37:29,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-08-30 11:37:29,611 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 11:37:29,611 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 214 flow [2023-08-30 11:37:29,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:29,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:29,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:37:29,624 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 11:37:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:29,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:29,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1762587094, now seen corresponding path program 2 times [2023-08-30 11:37:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:29,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999703039] [2023-08-30 11:37:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:29,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:29,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999703039] [2023-08-30 11:37:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999703039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107092182] [2023-08-30 11:37:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:37:29,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:29,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:30,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:37:30,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:37:30,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:37:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:37:30,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:37:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107092182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:37:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:37:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036216576] [2023-08-30 11:37:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:30,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:37:30,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-08-30 11:37:30,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:30,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:30,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-08-30 11:37:30,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:32,048 INFO L130 PetriNetUnfolder]: 19441/25111 cut-off events. [2023-08-30 11:37:32,048 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-30 11:37:32,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 25111 events. 19441/25111 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 139441 event pairs, 10590 based on Foata normal form. 2/7761 useless extension candidates. Maximal degree in co-relation 50508. Up to 24971 conditions per place. [2023-08-30 11:37:32,162 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 11:37:32,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 298 flow [2023-08-30 11:37:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-30 11:37:32,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-08-30 11:37:32,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-30 11:37:32,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-30 11:37:32,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:32,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-30 11:37:32,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 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 11:37:32,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:32,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:32,171 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 214 flow. Second operand 3 states and 636 transitions. [2023-08-30 11:37:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 298 flow [2023-08-30 11:37:32,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 253 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 11:37:32,174 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 151 flow [2023-08-30 11:37:32,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-08-30 11:37:32,175 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-08-30 11:37:32,176 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 151 flow [2023-08-30 11:37:32,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:32,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:32,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:37:32,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:37:32,381 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,SelfDestructingSolverStorable3 [2023-08-30 11:37:32,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:32,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1760136119, now seen corresponding path program 1 times [2023-08-30 11:37:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:32,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844940715] [2023-08-30 11:37:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:32,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844940715] [2023-08-30 11:37:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844940715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:37:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057982864] [2023-08-30 11:37:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:37:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:37:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:37:32,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-08-30 11:37:32,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:32,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:32,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-08-30 11:37:32,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:34,483 INFO L130 PetriNetUnfolder]: 19451/25221 cut-off events. [2023-08-30 11:37:34,483 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 11:37:34,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50714 conditions, 25221 events. 19451/25221 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 140790 event pairs, 10605 based on Foata normal form. 139/8225 useless extension candidates. Maximal degree in co-relation 50705. Up to 24925 conditions per place. [2023-08-30 11:37:34,585 INFO L137 encePairwiseOnDemand]: 458/470 looper letters, 75 selfloop transitions, 4 changer transitions 2/84 dead transitions. [2023-08-30 11:37:34,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 387 flow [2023-08-30 11:37:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:37:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:37:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1044 transitions. [2023-08-30 11:37:34,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442553191489362 [2023-08-30 11:37:34,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1044 transitions. [2023-08-30 11:37:34,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1044 transitions. [2023-08-30 11:37:34,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:34,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1044 transitions. [2023-08-30 11:37:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:34,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:34,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:34,597 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 151 flow. Second operand 5 states and 1044 transitions. [2023-08-30 11:37:34,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 387 flow [2023-08-30 11:37:34,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:34,600 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 199 flow [2023-08-30 11:37:34,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-30 11:37:34,602 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 11:37:34,603 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 199 flow [2023-08-30 11:37:34,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:34,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:34,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:37:34,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:34,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827547, now seen corresponding path program 1 times [2023-08-30 11:37:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829670401] [2023-08-30 11:37:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:34,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:34,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829670401] [2023-08-30 11:37:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829670401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510071969] [2023-08-30 11:37:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:34,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:34,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:34,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:34,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:37:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:37:34,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:34,830 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 11:37:34,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:37:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510071969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:37:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:37:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249606307] [2023-08-30 11:37:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:37:34,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:37:34,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:34,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:34,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:37:34,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:35,884 INFO L130 PetriNetUnfolder]: 12431/16371 cut-off events. [2023-08-30 11:37:35,885 INFO L131 PetriNetUnfolder]: For 5660/5660 co-relation queries the response was YES. [2023-08-30 11:37:35,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 16371 events. 12431/16371 cut-off events. For 5660/5660 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 89690 event pairs, 6930 based on Foata normal form. 0/6027 useless extension candidates. Maximal degree in co-relation 44495. Up to 16281 conditions per place. [2023-08-30 11:37:35,950 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 11:37:35,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 281 flow [2023-08-30 11:37:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-30 11:37:35,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-08-30 11:37:35,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-30 11:37:35,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-30 11:37:35,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:35,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-30 11:37:35,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:35,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:35,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:35,958 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 199 flow. Second operand 3 states and 640 transitions. [2023-08-30 11:37:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 281 flow [2023-08-30 11:37:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 275 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:35,960 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 177 flow [2023-08-30 11:37:35,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-30 11:37:35,961 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-30 11:37:35,961 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 177 flow [2023-08-30 11:37:35,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:35,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:35,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:35,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:36,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:36,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:36,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827669, now seen corresponding path program 1 times [2023-08-30 11:37:36,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:36,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310715486] [2023-08-30 11:37:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:36,212 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 11:37:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310715486] [2023-08-30 11:37:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310715486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:36,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:37:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733733646] [2023-08-30 11:37:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:36,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:36,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:37:36,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:36,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:36,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:37:36,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:37,784 INFO L130 PetriNetUnfolder]: 16321/22241 cut-off events. [2023-08-30 11:37:37,784 INFO L131 PetriNetUnfolder]: For 4936/4936 co-relation queries the response was YES. [2023-08-30 11:37:37,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54815 conditions, 22241 events. 16321/22241 cut-off events. For 4936/4936 co-relation queries the response was YES. Maximal size of possible extension queue 1781. Compared 140242 event pairs, 7110 based on Foata normal form. 0/9362 useless extension candidates. Maximal degree in co-relation 54802. Up to 14747 conditions per place. [2023-08-30 11:37:37,917 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 78 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 11:37:37,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 412 flow [2023-08-30 11:37:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-30 11:37:37,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474468085106383 [2023-08-30 11:37:37,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-30 11:37:37,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-30 11:37:37,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:37,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-30 11:37:37,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:37,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:37,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:37,924 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 177 flow. Second operand 3 states and 669 transitions. [2023-08-30 11:37:37,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 412 flow [2023-08-30 11:37:37,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:37,928 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 194 flow [2023-08-30 11:37:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 11:37:37,929 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 11:37:37,929 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 194 flow [2023-08-30 11:37:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 11:37:37,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:37,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1553045275, now seen corresponding path program 1 times [2023-08-30 11:37:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672746890] [2023-08-30 11:37:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:37:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672746890] [2023-08-30 11:37:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672746890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:37,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974481661] [2023-08-30 11:37:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:37,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:37,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:37,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:38,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:37:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:37:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:37:38,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:37:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974481661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:38,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:37:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949914102] [2023-08-30 11:37:38,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:38,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:37:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:37:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:37:38,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:37:38,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:38,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:38,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:37:38,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:41,592 INFO L130 PetriNetUnfolder]: 34261/45896 cut-off events. [2023-08-30 11:37:41,593 INFO L131 PetriNetUnfolder]: For 15251/15251 co-relation queries the response was YES. [2023-08-30 11:37:41,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124041 conditions, 45896 events. 34261/45896 cut-off events. For 15251/15251 co-relation queries the response was YES. Maximal size of possible extension queue 2830. Compared 300174 event pairs, 5390 based on Foata normal form. 0/22027 useless extension candidates. Maximal degree in co-relation 124027. Up to 12222 conditions per place. [2023-08-30 11:37:41,880 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 179 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-08-30 11:37:41,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 190 transitions, 936 flow [2023-08-30 11:37:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:37:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:37:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1578 transitions. [2023-08-30 11:37:41,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796352583586626 [2023-08-30 11:37:41,887 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1578 transitions. [2023-08-30 11:37:41,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1578 transitions. [2023-08-30 11:37:41,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:41,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1578 transitions. [2023-08-30 11:37:41,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 225.42857142857142) internal successors, (1578), 7 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:41,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:41,897 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:41,897 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 194 flow. Second operand 7 states and 1578 transitions. [2023-08-30 11:37:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 190 transitions, 936 flow [2023-08-30 11:37:41,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 190 transitions, 934 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:41,906 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 275 flow [2023-08-30 11:37:41,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-30 11:37:41,908 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-30 11:37:41,909 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 275 flow [2023-08-30 11:37:41,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:41,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:41,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:41,917 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 11:37:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:42,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:42,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash -899760642, now seen corresponding path program 1 times [2023-08-30 11:37:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917492358] [2023-08-30 11:37:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:37:42,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:42,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917492358] [2023-08-30 11:37:42,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917492358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:42,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756977119] [2023-08-30 11:37:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:42,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:42,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:42,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:37:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:37:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:37:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:37:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756977119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:37:42,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:37:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-30 11:37:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140582836] [2023-08-30 11:37:42,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:37:42,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:37:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:37:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:37:42,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-08-30 11:37:42,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:42,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:42,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-08-30 11:37:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:46,707 INFO L130 PetriNetUnfolder]: 36961/50451 cut-off events. [2023-08-30 11:37:46,708 INFO L131 PetriNetUnfolder]: For 135526/138026 co-relation queries the response was YES. [2023-08-30 11:37:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144165 conditions, 50451 events. 36961/50451 cut-off events. For 135526/138026 co-relation queries the response was YES. Maximal size of possible extension queue 2999. Compared 335831 event pairs, 20875 based on Foata normal form. 5540/31157 useless extension candidates. Maximal degree in co-relation 144148. Up to 42173 conditions per place. [2023-08-30 11:37:46,909 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 131 selfloop transitions, 10 changer transitions 3/147 dead transitions. [2023-08-30 11:37:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 147 transitions, 795 flow [2023-08-30 11:37:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:37:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:37:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1800 transitions. [2023-08-30 11:37:46,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2023-08-30 11:37:46,914 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1800 transitions. [2023-08-30 11:37:46,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1800 transitions. [2023-08-30 11:37:46,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:46,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1800 transitions. [2023-08-30 11:37:46,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.0) internal successors, (1800), 9 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:46,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:46,924 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:46,924 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 275 flow. Second operand 9 states and 1800 transitions. [2023-08-30 11:37:46,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 147 transitions, 795 flow [2023-08-30 11:37:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 147 transitions, 780 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:46,961 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 332 flow [2023-08-30 11:37:46,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-08-30 11:37:46,962 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-08-30 11:37:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 332 flow [2023-08-30 11:37:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:46,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:46,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:46,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:47,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:47,169 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:47,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1115655072, now seen corresponding path program 2 times [2023-08-30 11:37:47,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:47,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357243885] [2023-08-30 11:37:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:47,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:37:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357243885] [2023-08-30 11:37:47,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357243885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:37:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558657404] [2023-08-30 11:37:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:37:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:37:47,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:37:47,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:37:47,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:37:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:37:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:37:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:37:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:37:47,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:37:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558657404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:37:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:37:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386835904] [2023-08-30 11:37:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:37:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:37:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:37:47,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:37:47,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:47,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:47,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:37:47,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:51,371 INFO L130 PetriNetUnfolder]: 37881/52076 cut-off events. [2023-08-30 11:37:51,372 INFO L131 PetriNetUnfolder]: For 28049/28049 co-relation queries the response was YES. [2023-08-30 11:37:51,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147464 conditions, 52076 events. 37881/52076 cut-off events. For 28049/28049 co-relation queries the response was YES. Maximal size of possible extension queue 3119. Compared 361995 event pairs, 1945 based on Foata normal form. 1280/28063 useless extension candidates. Maximal degree in co-relation 147442. Up to 34140 conditions per place. [2023-08-30 11:37:51,604 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 102 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-08-30 11:37:51,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 632 flow [2023-08-30 11:37:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:37:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:37:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 885 transitions. [2023-08-30 11:37:51,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47074468085106386 [2023-08-30 11:37:51,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 885 transitions. [2023-08-30 11:37:51,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 885 transitions. [2023-08-30 11:37:51,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:51,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 885 transitions. [2023-08-30 11:37:51,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:51,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:51,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:51,612 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 332 flow. Second operand 4 states and 885 transitions. [2023-08-30 11:37:51,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 632 flow [2023-08-30 11:37:51,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 615 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 11:37:51,914 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 284 flow [2023-08-30 11:37:51,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-30 11:37:51,914 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 11:37:51,915 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 284 flow [2023-08-30 11:37:51,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:51,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:51,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:51,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:37:52,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:52,121 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:52,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1897036264, now seen corresponding path program 1 times [2023-08-30 11:37:52,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:52,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495156232] [2023-08-30 11:37:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:52,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:52,200 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 11:37:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495156232] [2023-08-30 11:37:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495156232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:37:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889877395] [2023-08-30 11:37:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:37:52,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:37:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:37:52,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-08-30 11:37:52,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:52,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:52,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-08-30 11:37:52,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:55,308 INFO L130 PetriNetUnfolder]: 26974/37454 cut-off events. [2023-08-30 11:37:55,309 INFO L131 PetriNetUnfolder]: For 85194/87218 co-relation queries the response was YES. [2023-08-30 11:37:55,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108461 conditions, 37454 events. 26974/37454 cut-off events. For 85194/87218 co-relation queries the response was YES. Maximal size of possible extension queue 2375. Compared 254108 event pairs, 18102 based on Foata normal form. 2172/21499 useless extension candidates. Maximal degree in co-relation 108440. Up to 36992 conditions per place. [2023-08-30 11:37:55,494 INFO L137 encePairwiseOnDemand]: 454/470 looper letters, 62 selfloop transitions, 9 changer transitions 6/80 dead transitions. [2023-08-30 11:37:55,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 579 flow [2023-08-30 11:37:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:37:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:37:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1022 transitions. [2023-08-30 11:37:55,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4348936170212766 [2023-08-30 11:37:55,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1022 transitions. [2023-08-30 11:37:55,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1022 transitions. [2023-08-30 11:37:55,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:55,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1022 transitions. [2023-08-30 11:37:55,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:55,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:55,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:55,503 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 284 flow. Second operand 5 states and 1022 transitions. [2023-08-30 11:37:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 579 flow [2023-08-30 11:37:55,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:37:55,529 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 335 flow [2023-08-30 11:37:55,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-30 11:37:55,530 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 11:37:55,530 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 335 flow [2023-08-30 11:37:55,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:55,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:55,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 11:37:55,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:55,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -639398407, now seen corresponding path program 1 times [2023-08-30 11:37:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462304429] [2023-08-30 11:37:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:55,599 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 11:37:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462304429] [2023-08-30 11:37:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462304429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:55,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:37:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556540177] [2023-08-30 11:37:55,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:55,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-08-30 11:37:55,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:55,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:55,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-08-30 11:37:55,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:37:58,819 INFO L130 PetriNetUnfolder]: 27186/37986 cut-off events. [2023-08-30 11:37:58,819 INFO L131 PetriNetUnfolder]: For 104034/106178 co-relation queries the response was YES. [2023-08-30 11:37:58,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131302 conditions, 37986 events. 27186/37986 cut-off events. For 104034/106178 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 240250 event pairs, 5338 based on Foata normal form. 2944/22150 useless extension candidates. Maximal degree in co-relation 131278. Up to 34169 conditions per place. [2023-08-30 11:37:59,203 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 70 selfloop transitions, 5 changer transitions 3/81 dead transitions. [2023-08-30 11:37:59,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 619 flow [2023-08-30 11:37:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:37:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:37:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-30 11:37:59,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46170212765957447 [2023-08-30 11:37:59,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-30 11:37:59,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-30 11:37:59,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:37:59,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-30 11:37:59,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:59,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:59,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:59,216 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 335 flow. Second operand 3 states and 651 transitions. [2023-08-30 11:37:59,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 619 flow [2023-08-30 11:37:59,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 11:37:59,239 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 340 flow [2023-08-30 11:37:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-30 11:37:59,240 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 11:37:59,241 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 340 flow [2023-08-30 11:37:59,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:59,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:59,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:59,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 11:37:59,242 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:37:59,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash 366182754, now seen corresponding path program 1 times [2023-08-30 11:37:59,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:59,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858325465] [2023-08-30 11:37:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:37:59,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:59,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858325465] [2023-08-30 11:37:59,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858325465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:59,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:59,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:37:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622760895] [2023-08-30 11:37:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:59,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:59,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:59,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-08-30 11:37:59,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:59,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:59,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-08-30 11:37:59,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:02,214 INFO L130 PetriNetUnfolder]: 24131/33774 cut-off events. [2023-08-30 11:38:02,215 INFO L131 PetriNetUnfolder]: For 62589/62669 co-relation queries the response was YES. [2023-08-30 11:38:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132157 conditions, 33774 events. 24131/33774 cut-off events. For 62589/62669 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 211014 event pairs, 9756 based on Foata normal form. 120/18202 useless extension candidates. Maximal degree in co-relation 132133. Up to 33655 conditions per place. [2023-08-30 11:38:02,394 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 59 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-08-30 11:38:02,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 482 flow [2023-08-30 11:38:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:38:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:38:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 11:38:02,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-08-30 11:38:02,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 11:38:02,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 11:38:02,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:02,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 11:38:02,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,398 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 340 flow. Second operand 3 states and 632 transitions. [2023-08-30 11:38:02,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 482 flow [2023-08-30 11:38:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 455 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 11:38:02,420 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 334 flow [2023-08-30 11:38:02,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-30 11:38:02,421 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 11:38:02,421 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 334 flow [2023-08-30 11:38:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:02,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 11:38:02,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:02,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2026630147, now seen corresponding path program 2 times [2023-08-30 11:38:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109369548] [2023-08-30 11:38:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:38:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109369548] [2023-08-30 11:38:02,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109369548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17350593] [2023-08-30 11:38:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:38:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:02,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:02,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:38:02,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:38:02,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:38:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 11:38:02,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:38:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17350593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:38:02,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:38:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-08-30 11:38:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177780006] [2023-08-30 11:38:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:38:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:38:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:38:02,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:38:02,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:02,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:02,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:38:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:05,192 INFO L130 PetriNetUnfolder]: 22579/31766 cut-off events. [2023-08-30 11:38:05,192 INFO L131 PetriNetUnfolder]: For 53640/53720 co-relation queries the response was YES. [2023-08-30 11:38:05,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119448 conditions, 31766 events. 22579/31766 cut-off events. For 53640/53720 co-relation queries the response was YES. Maximal size of possible extension queue 2122. Compared 199005 event pairs, 12732 based on Foata normal form. 626/17572 useless extension candidates. Maximal degree in co-relation 119424. Up to 31646 conditions per place. [2023-08-30 11:38:05,379 INFO L137 encePairwiseOnDemand]: 468/470 looper letters, 56 selfloop transitions, 1 changer transitions 1/61 dead transitions. [2023-08-30 11:38:05,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 438 flow [2023-08-30 11:38:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:38:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:38:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-30 11:38:05,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-08-30 11:38:05,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-30 11:38:05,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-30 11:38:05,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:05,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-30 11:38:05,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 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 11:38:05,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:05,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:05,385 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 334 flow. Second operand 3 states and 636 transitions. [2023-08-30 11:38:05,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 438 flow [2023-08-30 11:38:05,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 405 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 11:38:05,408 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 285 flow [2023-08-30 11:38:05,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-30 11:38:05,409 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-30 11:38:05,409 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 285 flow [2023-08-30 11:38:05,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:05,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:05,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:05,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:38:05,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:05,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:05,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash 672794766, now seen corresponding path program 1 times [2023-08-30 11:38:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591753141] [2023-08-30 11:38:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:05,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:06,349 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 11:38:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:06,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591753141] [2023-08-30 11:38:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591753141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:06,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658705321] [2023-08-30 11:38:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:06,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:06,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:06,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:38:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:38:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:06,678 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 11:38:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:06,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:06,779 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_483 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_483) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-30 11:38:06,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:06,812 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 42 treesize of output 34 [2023-08-30 11:38:06,822 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 9 treesize of output 3 [2023-08-30 11:38:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:06,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658705321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:06,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:06,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-08-30 11:38:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324562583] [2023-08-30 11:38:06,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:38:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:38:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-30 11:38:07,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 470 [2023-08-30 11:38:07,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 285 flow. Second operand has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:07,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:07,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 470 [2023-08-30 11:38:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:11,582 INFO L130 PetriNetUnfolder]: 26081/37081 cut-off events. [2023-08-30 11:38:11,582 INFO L131 PetriNetUnfolder]: For 29800/29908 co-relation queries the response was YES. [2023-08-30 11:38:11,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131205 conditions, 37081 events. 26081/37081 cut-off events. For 29800/29908 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 247281 event pairs, 1588 based on Foata normal form. 108/20529 useless extension candidates. Maximal degree in co-relation 131184. Up to 21825 conditions per place. [2023-08-30 11:38:11,763 INFO L137 encePairwiseOnDemand]: 450/470 looper letters, 203 selfloop transitions, 64 changer transitions 0/269 dead transitions. [2023-08-30 11:38:11,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 269 transitions, 1701 flow [2023-08-30 11:38:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:38:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:38:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3159 transitions. [2023-08-30 11:38:11,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200607902735562 [2023-08-30 11:38:11,771 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3159 transitions. [2023-08-30 11:38:11,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3159 transitions. [2023-08-30 11:38:11,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:11,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3159 transitions. [2023-08-30 11:38:11,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.42857142857142) internal successors, (3159), 21 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,788 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,788 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 285 flow. Second operand 21 states and 3159 transitions. [2023-08-30 11:38:11,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 269 transitions, 1701 flow [2023-08-30 11:38:11,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 269 transitions, 1700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:38:11,799 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 847 flow [2023-08-30 11:38:11,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=847, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2023-08-30 11:38:11,800 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2023-08-30 11:38:11,800 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 847 flow [2023-08-30 11:38:11,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:11,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:11,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 11:38:12,004 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,SelfDestructingSolverStorable14 [2023-08-30 11:38:12,005 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:12,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -111879881, now seen corresponding path program 1 times [2023-08-30 11:38:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:12,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199319097] [2023-08-30 11:38:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:38:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199319097] [2023-08-30 11:38:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199319097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334815945] [2023-08-30 11:38:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:12,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:12,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:38:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:12,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:38:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:38:12,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:38:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334815945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:38:12,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:38:12,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-30 11:38:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137358017] [2023-08-30 11:38:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:12,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:38:12,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:38:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:38:12,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:38:12,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 847 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:12,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:12,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:38:12,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:14,959 INFO L130 PetriNetUnfolder]: 19549/28181 cut-off events. [2023-08-30 11:38:14,959 INFO L131 PetriNetUnfolder]: For 79467/79555 co-relation queries the response was YES. [2023-08-30 11:38:15,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128422 conditions, 28181 events. 19549/28181 cut-off events. For 79467/79555 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 181273 event pairs, 9952 based on Foata normal form. 1320/20425 useless extension candidates. Maximal degree in co-relation 128387. Up to 27757 conditions per place. [2023-08-30 11:38:15,386 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 103 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-30 11:38:15,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 1025 flow [2023-08-30 11:38:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:38:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:38:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-30 11:38:15,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2023-08-30 11:38:15,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-30 11:38:15,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-30 11:38:15,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:15,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-30 11:38:15,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:15,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:15,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:15,393 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 847 flow. Second operand 3 states and 635 transitions. [2023-08-30 11:38:15,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 1025 flow [2023-08-30 11:38:15,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 979 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 11:38:15,500 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 773 flow [2023-08-30 11:38:15,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2023-08-30 11:38:15,502 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2023-08-30 11:38:15,502 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 773 flow [2023-08-30 11:38:15,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:15,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:15,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:15,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 11:38:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:38:15,707 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:15,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash -111879884, now seen corresponding path program 1 times [2023-08-30 11:38:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046657509] [2023-08-30 11:38:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046657509] [2023-08-30 11:38:16,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046657509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716507654] [2023-08-30 11:38:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:16,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:16,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:38:16,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:38:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:38:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:16,511 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 11:38:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:38:16,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:38:16,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716507654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:38:16,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:38:16,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 11:38:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642427453] [2023-08-30 11:38:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:38:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:38:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:38:16,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 11:38:16,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 773 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:16,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:16,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 11:38:16,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:19,963 INFO L130 PetriNetUnfolder]: 23921/34705 cut-off events. [2023-08-30 11:38:19,963 INFO L131 PetriNetUnfolder]: For 91001/91109 co-relation queries the response was YES. [2023-08-30 11:38:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155500 conditions, 34705 events. 23921/34705 cut-off events. For 91001/91109 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 235368 event pairs, 4120 based on Foata normal form. 804/24445 useless extension candidates. Maximal degree in co-relation 155464. Up to 22273 conditions per place. [2023-08-30 11:38:20,198 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 123 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2023-08-30 11:38:20,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1360 flow [2023-08-30 11:38:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:38:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:38:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-08-30 11:38:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124113475177305 [2023-08-30 11:38:20,201 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-08-30 11:38:20,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-08-30 11:38:20,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:20,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-08-30 11:38:20,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:20,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:20,205 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:20,205 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 773 flow. Second operand 6 states and 1163 transitions. [2023-08-30 11:38:20,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1360 flow [2023-08-30 11:38:20,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:38:20,402 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 907 flow [2023-08-30 11:38:20,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=907, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2023-08-30 11:38:20,403 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2023-08-30 11:38:20,403 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 907 flow [2023-08-30 11:38:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:20,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:20,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:20,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 11:38:20,608 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,SelfDestructingSolverStorable16 [2023-08-30 11:38:20,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:20,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -111879798, now seen corresponding path program 1 times [2023-08-30 11:38:20,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:20,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057545280] [2023-08-30 11:38:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:20,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:38:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057545280] [2023-08-30 11:38:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057545280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:38:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:38:20,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:38:20,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616291611] [2023-08-30 11:38:20,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:38:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:38:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:38:20,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-08-30 11:38:20,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 907 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:20,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:20,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-08-30 11:38:20,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:23,601 INFO L130 PetriNetUnfolder]: 19661/28789 cut-off events. [2023-08-30 11:38:23,602 INFO L131 PetriNetUnfolder]: For 115421/115509 co-relation queries the response was YES. [2023-08-30 11:38:23,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136116 conditions, 28789 events. 19661/28789 cut-off events. For 115421/115509 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 192580 event pairs, 9704 based on Foata normal form. 88/20785 useless extension candidates. Maximal degree in co-relation 136076. Up to 24209 conditions per place. [2023-08-30 11:38:23,785 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 109 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2023-08-30 11:38:23,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 121 transitions, 1189 flow [2023-08-30 11:38:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:38:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:38:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 11:38:23,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45673758865248226 [2023-08-30 11:38:23,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 11:38:23,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 11:38:23,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:23,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 11:38:23,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:23,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:23,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:23,789 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 907 flow. Second operand 3 states and 644 transitions. [2023-08-30 11:38:23,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 121 transitions, 1189 flow [2023-08-30 11:38:23,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 121 transitions, 1163 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 11:38:23,969 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 849 flow [2023-08-30 11:38:23,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=849, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-08-30 11:38:23,969 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2023-08-30 11:38:23,969 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 849 flow [2023-08-30 11:38:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:23,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 11:38:23,970 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:23,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash -111879698, now seen corresponding path program 1 times [2023-08-30 11:38:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:23,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100036620] [2023-08-30 11:38:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:23,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:38:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100036620] [2023-08-30 11:38:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100036620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743853969] [2023-08-30 11:38:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:24,896 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 11:38:24,899 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 11:38:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 11:38:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:25,141 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 11:38:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:38:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:25,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:25,254 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 46 treesize of output 38 [2023-08-30 11:38:25,265 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 11 treesize of output 5 [2023-08-30 11:38:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:38:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743853969] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:25,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:38:25,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 19 [2023-08-30 11:38:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398373663] [2023-08-30 11:38:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:38:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:38:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=357, Unknown=4, NotChecked=0, Total=420 [2023-08-30 11:38:27,436 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 11:38:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 470 [2023-08-30 11:38:27,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:27,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:27,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 470 [2023-08-30 11:38:27,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:30,198 INFO L130 PetriNetUnfolder]: 18677/27505 cut-off events. [2023-08-30 11:38:30,198 INFO L131 PetriNetUnfolder]: For 109013/109121 co-relation queries the response was YES. [2023-08-30 11:38:30,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131360 conditions, 27505 events. 18677/27505 cut-off events. For 109013/109121 co-relation queries the response was YES. Maximal size of possible extension queue 1649. Compared 182879 event pairs, 4456 based on Foata normal form. 364/20853 useless extension candidates. Maximal degree in co-relation 131320. Up to 19129 conditions per place. [2023-08-30 11:38:30,640 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 109 selfloop transitions, 48 changer transitions 0/159 dead transitions. [2023-08-30 11:38:30,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1564 flow [2023-08-30 11:38:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:38:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:38:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1234 transitions. [2023-08-30 11:38:30,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750759878419453 [2023-08-30 11:38:30,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1234 transitions. [2023-08-30 11:38:30,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1234 transitions. [2023-08-30 11:38:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1234 transitions. [2023-08-30 11:38:30,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.28571428571428) internal successors, (1234), 7 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,649 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 849 flow. Second operand 7 states and 1234 transitions. [2023-08-30 11:38:30,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1564 flow [2023-08-30 11:38:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1546 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:38:31,069 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1167 flow [2023-08-30 11:38:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1167, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2023-08-30 11:38:31,069 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2023-08-30 11:38:31,070 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1167 flow [2023-08-30 11:38:31,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:31,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:31,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:31,074 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 11:38:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:31,272 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:31,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash -289923211, now seen corresponding path program 1 times [2023-08-30 11:38:31,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575265092] [2023-08-30 11:38:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:31,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575265092] [2023-08-30 11:38:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575265092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297501342] [2023-08-30 11:38:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:31,573 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 11:38:31,604 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 11:38:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:38:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:31,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:31,876 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 11:38:31,877 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 26 treesize of output 13 [2023-08-30 11:38:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:31,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297501342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:31,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:31,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:38:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315886927] [2023-08-30 11:38:31,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:31,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:38:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:38:31,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:38:32,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 470 [2023-08-30 11:38:32,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1167 flow. Second operand has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:32,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:32,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 470 [2023-08-30 11:38:32,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:35,785 INFO L130 PetriNetUnfolder]: 19397/28585 cut-off events. [2023-08-30 11:38:35,786 INFO L131 PetriNetUnfolder]: For 130021/130129 co-relation queries the response was YES. [2023-08-30 11:38:35,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142696 conditions, 28585 events. 19397/28585 cut-off events. For 130021/130129 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 195283 event pairs, 1428 based on Foata normal form. 200/21613 useless extension candidates. Maximal degree in co-relation 142652. Up to 14121 conditions per place. [2023-08-30 11:38:35,991 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 187 selfloop transitions, 65 changer transitions 0/254 dead transitions. [2023-08-30 11:38:35,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 254 transitions, 2516 flow [2023-08-30 11:38:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 11:38:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 11:38:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2750 transitions. [2023-08-30 11:38:35,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900709219858156 [2023-08-30 11:38:35,995 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2750 transitions. [2023-08-30 11:38:35,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2750 transitions. [2023-08-30 11:38:35,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:35,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2750 transitions. [2023-08-30 11:38:35,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.33333333333334) internal successors, (2750), 15 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:36,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:36,005 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:36,005 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1167 flow. Second operand 15 states and 2750 transitions. [2023-08-30 11:38:36,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 254 transitions, 2516 flow [2023-08-30 11:38:36,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 254 transitions, 2479 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 11:38:36,481 INFO L231 Difference]: Finished difference. Result has 125 places, 133 transitions, 1513 flow [2023-08-30 11:38:36,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1513, PETRI_PLACES=125, PETRI_TRANSITIONS=133} [2023-08-30 11:38:36,482 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 11:38:36,482 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 133 transitions, 1513 flow [2023-08-30 11:38:36,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:36,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:36,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:36,491 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 11:38:36,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:36,688 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:36,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 672794765, now seen corresponding path program 2 times [2023-08-30 11:38:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475337115] [2023-08-30 11:38:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:37,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:37,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475337115] [2023-08-30 11:38:37,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475337115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:37,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601721618] [2023-08-30 11:38:37,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:38:37,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:37,080 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 11:38:37,104 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 11:38:37,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:38:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:38:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:38:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:37,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:37,290 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 11:38:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:38:37,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:38:37,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601721618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:38:37,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:38:37,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 11:38:37,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523899518] [2023-08-30 11:38:37,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:38:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:38:37,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:38:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:38:37,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 11:38:37,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 133 transitions, 1513 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:37,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:37,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 11:38:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:40,727 INFO L130 PetriNetUnfolder]: 19661/29073 cut-off events. [2023-08-30 11:38:40,727 INFO L131 PetriNetUnfolder]: For 189109/189217 co-relation queries the response was YES. [2023-08-30 11:38:40,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156768 conditions, 29073 events. 19661/29073 cut-off events. For 189109/189217 co-relation queries the response was YES. Maximal size of possible extension queue 1668. Compared 197517 event pairs, 5080 based on Foata normal form. 180/22561 useless extension candidates. Maximal degree in co-relation 156719. Up to 17565 conditions per place. [2023-08-30 11:38:41,076 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 120 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2023-08-30 11:38:41,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 2084 flow [2023-08-30 11:38:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:38:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:38:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1165 transitions. [2023-08-30 11:38:41,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-08-30 11:38:41,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1165 transitions. [2023-08-30 11:38:41,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1165 transitions. [2023-08-30 11:38:41,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:41,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1165 transitions. [2023-08-30 11:38:41,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.16666666666666) internal successors, (1165), 6 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:41,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:41,081 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:41,081 INFO L175 Difference]: Start difference. First operand has 125 places, 133 transitions, 1513 flow. Second operand 6 states and 1165 transitions. [2023-08-30 11:38:41,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 2084 flow [2023-08-30 11:38:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1976 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 11:38:42,078 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1611 flow [2023-08-30 11:38:42,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1611, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2023-08-30 11:38:42,079 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 11:38:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1611 flow [2023-08-30 11:38:42,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:42,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:38:42,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:38:42,084 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 11:38:42,280 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,SelfDestructingSolverStorable20 [2023-08-30 11:38:42,281 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:38:42,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:38:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 872022787, now seen corresponding path program 1 times [2023-08-30 11:38:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:38:42,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099396303] [2023-08-30 11:38:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:38:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:38:42,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:38:42,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099396303] [2023-08-30 11:38:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099396303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:38:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516972602] [2023-08-30 11:38:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:38:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:38:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:38:42,637 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 11:38:42,640 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 11:38:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:38:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:38:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:38:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:42,798 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 11:38:42,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 11:38:42,865 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 11:38:42,927 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 11:38:42,928 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 11 treesize of output 11 [2023-08-30 11:38:42,984 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 11:38:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:43,044 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 11:38:43,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:43,122 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 11:38:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:38:43,227 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 11:38:43,265 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 11:38:43,265 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 23 treesize of output 10 [2023-08-30 11:38:43,283 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 11:38:43,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:38:43,321 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_826 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_826) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-30 11:38:43,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:43,621 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 35 treesize of output 36 [2023-08-30 11:38:43,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:38:43,637 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 4897 treesize of output 4769 [2023-08-30 11:38:43,700 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 288 treesize of output 276 [2023-08-30 11:38:43,713 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 140 treesize of output 134 [2023-08-30 11:38:43,724 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 270 treesize of output 246 [2023-08-30 11:38:43,734 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 246 treesize of output 198 [2023-08-30 11:38:43,975 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 11:38:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516972602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:38:43,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:38:43,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-30 11:38:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036187768] [2023-08-30 11:38:43,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:38:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:38:43,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:38:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:38:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=512, Unknown=9, NotChecked=46, Total=650 [2023-08-30 11:38:44,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 470 [2023-08-30 11:38:44,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1611 flow. Second operand has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:44,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:38:44,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 470 [2023-08-30 11:38:44,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:49,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:38:52,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:38:55,050 WARN L539 Checker$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 11:38:59,716 INFO L130 PetriNetUnfolder]: 21364/32032 cut-off events. [2023-08-30 11:38:59,716 INFO L131 PetriNetUnfolder]: For 247371/247482 co-relation queries the response was YES. [2023-08-30 11:38:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177263 conditions, 32032 events. 21364/32032 cut-off events. For 247371/247482 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 229294 event pairs, 4232 based on Foata normal form. 235/25190 useless extension candidates. Maximal degree in co-relation 177214. Up to 15624 conditions per place. [2023-08-30 11:38:59,985 INFO L137 encePairwiseOnDemand]: 451/470 looper letters, 254 selfloop transitions, 136 changer transitions 0/392 dead transitions. [2023-08-30 11:38:59,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 392 transitions, 4304 flow [2023-08-30 11:38:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:38:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:38:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4272 transitions. [2023-08-30 11:38:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31342626559060893 [2023-08-30 11:38:59,989 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4272 transitions. [2023-08-30 11:38:59,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4272 transitions. [2023-08-30 11:38:59,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:59,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4272 transitions. [2023-08-30 11:38:59,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 147.31034482758622) internal successors, (4272), 29 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:00,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:00,005 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:00,005 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1611 flow. Second operand 29 states and 4272 transitions. [2023-08-30 11:39:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 392 transitions, 4304 flow [2023-08-30 11:39:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 392 transitions, 4194 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-08-30 11:39:00,721 INFO L231 Difference]: Finished difference. Result has 163 places, 225 transitions, 3155 flow [2023-08-30 11:39:00,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3155, PETRI_PLACES=163, PETRI_TRANSITIONS=225} [2023-08-30 11:39:00,722 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 106 predicate places. [2023-08-30 11:39:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 225 transitions, 3155 flow [2023-08-30 11:39:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:00,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:00,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:00,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 11:39:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:00,924 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:39:00,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -618093243, now seen corresponding path program 1 times [2023-08-30 11:39:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449219099] [2023-08-30 11:39:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449219099] [2023-08-30 11:39:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449219099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878739265] [2023-08-30 11:39:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:01,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:01,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:01,366 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 11:39:01,369 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 11:39:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:39:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:01,688 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 11:39:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:01,739 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 11:39:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:01,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:01,803 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (< 0 (+ 2147483648 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_880) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-30 11:39:02,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:02,006 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 174 treesize of output 158 [2023-08-30 11:39:02,012 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 32 treesize of output 20 [2023-08-30 11:39:02,018 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 31 treesize of output 25 [2023-08-30 11:39:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878739265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:02,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:02,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 11:39:02,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863196063] [2023-08-30 11:39:02,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:02,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:39:02,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:39:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=340, Unknown=8, NotChecked=38, Total=462 [2023-08-30 11:39:02,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 470 [2023-08-30 11:39:02,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 225 transitions, 3155 flow. Second operand has 22 states, 22 states have (on average 145.77272727272728) internal successors, (3207), 22 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:02,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:02,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 470 [2023-08-30 11:39:02,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:07,229 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 11:39:12,284 INFO L130 PetriNetUnfolder]: 22905/34479 cut-off events. [2023-08-30 11:39:12,284 INFO L131 PetriNetUnfolder]: For 421988/422099 co-relation queries the response was YES. [2023-08-30 11:39:12,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235112 conditions, 34479 events. 22905/34479 cut-off events. For 421988/422099 co-relation queries the response was YES. Maximal size of possible extension queue 2032. Compared 250215 event pairs, 2719 based on Foata normal form. 371/27773 useless extension candidates. Maximal degree in co-relation 235049. Up to 16489 conditions per place. [2023-08-30 11:39:12,641 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 278 selfloop transitions, 134 changer transitions 0/414 dead transitions. [2023-08-30 11:39:12,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 414 transitions, 5868 flow [2023-08-30 11:39:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:39:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:39:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3534 transitions. [2023-08-30 11:39:12,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269195189639223 [2023-08-30 11:39:12,644 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3534 transitions. [2023-08-30 11:39:12,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3534 transitions. [2023-08-30 11:39:12,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:12,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3534 transitions. [2023-08-30 11:39:12,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 153.65217391304347) internal successors, (3534), 23 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:12,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 470.0) internal successors, (11280), 24 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:12,652 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 470.0) internal successors, (11280), 24 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:12,653 INFO L175 Difference]: Start difference. First operand has 163 places, 225 transitions, 3155 flow. Second operand 23 states and 3534 transitions. [2023-08-30 11:39:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 414 transitions, 5868 flow [2023-08-30 11:39:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 414 transitions, 5510 flow, removed 166 selfloop flow, removed 6 redundant places. [2023-08-30 11:39:14,518 INFO L231 Difference]: Finished difference. Result has 185 places, 249 transitions, 3819 flow [2023-08-30 11:39:14,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3819, PETRI_PLACES=185, PETRI_TRANSITIONS=249} [2023-08-30 11:39:14,519 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2023-08-30 11:39:14,519 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 249 transitions, 3819 flow [2023-08-30 11:39:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 145.77272727272728) internal successors, (3207), 22 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:14,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:14,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:14,524 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 11:39:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:14,721 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:39:14,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1995015138, now seen corresponding path program 1 times [2023-08-30 11:39:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773812953] [2023-08-30 11:39:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:15,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773812953] [2023-08-30 11:39:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773812953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705730720] [2023-08-30 11:39:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:15,413 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 11:39:15,416 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 11:39:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:39:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:15,700 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 11:39:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:39:15,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:15,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:15,826 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 46 treesize of output 38 [2023-08-30 11:39:15,829 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 11 treesize of output 5 [2023-08-30 11:39:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:39:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705730720] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:15,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:39:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 11:39:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830510020] [2023-08-30 11:39:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:39:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:39:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:39:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2023-08-30 11:39:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 470 [2023-08-30 11:39:16,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 249 transitions, 3819 flow. Second operand has 7 states, 7 states have (on average 168.85714285714286) internal successors, (1182), 7 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:16,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:16,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 470 [2023-08-30 11:39:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:21,389 INFO L130 PetriNetUnfolder]: 24393/36921 cut-off events. [2023-08-30 11:39:21,390 INFO L131 PetriNetUnfolder]: For 597379/597487 co-relation queries the response was YES. [2023-08-30 11:39:21,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273409 conditions, 36921 events. 24393/36921 cut-off events. For 597379/597487 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 269737 event pairs, 4427 based on Foata normal form. 320/30197 useless extension candidates. Maximal degree in co-relation 273341. Up to 24433 conditions per place. [2023-08-30 11:39:21,825 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 242 selfloop transitions, 76 changer transitions 0/320 dead transitions. [2023-08-30 11:39:21,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 320 transitions, 5247 flow [2023-08-30 11:39:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:39:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:39:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1244 transitions. [2023-08-30 11:39:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781155015197568 [2023-08-30 11:39:21,827 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1244 transitions. [2023-08-30 11:39:21,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1244 transitions. [2023-08-30 11:39:21,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:21,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1244 transitions. [2023-08-30 11:39:21,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.71428571428572) internal successors, (1244), 7 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:21,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:21,830 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:21,830 INFO L175 Difference]: Start difference. First operand has 185 places, 249 transitions, 3819 flow. Second operand 7 states and 1244 transitions. [2023-08-30 11:39:21,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 320 transitions, 5247 flow [2023-08-30 11:39:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 320 transitions, 5079 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-08-30 11:39:24,216 INFO L231 Difference]: Finished difference. Result has 185 places, 256 transitions, 4049 flow [2023-08-30 11:39:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4049, PETRI_PLACES=185, PETRI_TRANSITIONS=256} [2023-08-30 11:39:24,217 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2023-08-30 11:39:24,217 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 256 transitions, 4049 flow [2023-08-30 11:39:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.85714285714286) internal successors, (1182), 7 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:24,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:24,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:24,222 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 11:39:24,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 11:39:24,422 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:39:24,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:24,423 INFO L85 PathProgramCache]: Analyzing trace with hash -618093057, now seen corresponding path program 1 times [2023-08-30 11:39:24,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:24,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792279654] [2023-08-30 11:39:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:24,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792279654] [2023-08-30 11:39:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792279654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35567166] [2023-08-30 11:39:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:24,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:24,963 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 11:39:24,978 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 11:39:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:39:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,148 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 11:39:25,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 11:39:25,216 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 11:39:25,350 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 11:39:25,350 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 11 treesize of output 11 [2023-08-30 11:39:25,403 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 11:39:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,470 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 11:39:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,584 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 11:39:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:25,646 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 11:39:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:39:25,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:25,680 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 17 treesize of output 10 [2023-08-30 11:39:25,701 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 11:39:25,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:28,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:28,111 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 37 treesize of output 38 [2023-08-30 11:39:28,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:28,132 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 10817 treesize of output 10561 [2023-08-30 11:39:28,193 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 157 treesize of output 145 [2023-08-30 11:39:28,204 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 145 treesize of output 139 [2023-08-30 11:39:28,212 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 139 treesize of output 115 [2023-08-30 11:39:28,222 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 162 treesize of output 114 [2023-08-30 11:39:28,431 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 11:39:28,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35567166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:28,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:28,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-30 11:39:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944510539] [2023-08-30 11:39:28,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:39:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:39:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=595, Unknown=9, NotChecked=0, Total=702 [2023-08-30 11:39:30,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:39:32,938 WARN L539 Checker$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 11:39:35,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:39:36,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 470 [2023-08-30 11:39:36,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 256 transitions, 4049 flow. Second operand has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:36,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:36,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 470 [2023-08-30 11:39:36,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:40,890 WARN L539 Checker$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 11:39:47,101 INFO L130 PetriNetUnfolder]: 24344/36911 cut-off events. [2023-08-30 11:39:47,101 INFO L131 PetriNetUnfolder]: For 648847/648955 co-relation queries the response was YES. [2023-08-30 11:39:47,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272337 conditions, 36911 events. 24344/36911 cut-off events. For 648847/648955 co-relation queries the response was YES. Maximal size of possible extension queue 2182. Compared 271545 event pairs, 11394 based on Foata normal form. 157/30015 useless extension candidates. Maximal degree in co-relation 272265. Up to 29574 conditions per place. [2023-08-30 11:39:47,507 INFO L137 encePairwiseOnDemand]: 446/470 looper letters, 296 selfloop transitions, 85 changer transitions 2/385 dead transitions. [2023-08-30 11:39:47,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 385 transitions, 5789 flow [2023-08-30 11:39:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 11:39:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 11:39:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3585 transitions. [2023-08-30 11:39:47,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051063829787234 [2023-08-30 11:39:47,512 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3585 transitions. [2023-08-30 11:39:47,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3585 transitions. [2023-08-30 11:39:47,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:47,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3585 transitions. [2023-08-30 11:39:47,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 143.4) internal successors, (3585), 25 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:47,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 470.0) internal successors, (12220), 26 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:47,526 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 470.0) internal successors, (12220), 26 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:47,526 INFO L175 Difference]: Start difference. First operand has 185 places, 256 transitions, 4049 flow. Second operand 25 states and 3585 transitions. [2023-08-30 11:39:47,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 385 transitions, 5789 flow [2023-08-30 11:39:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 385 transitions, 5695 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 11:39:49,752 INFO L231 Difference]: Finished difference. Result has 213 places, 281 transitions, 4549 flow [2023-08-30 11:39:49,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4549, PETRI_PLACES=213, PETRI_TRANSITIONS=281} [2023-08-30 11:39:49,753 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 156 predicate places. [2023-08-30 11:39:49,753 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 281 transitions, 4549 flow [2023-08-30 11:39:49,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:49,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:49,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:49,762 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 11:39:49,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:49,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:39:49,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 505104638, now seen corresponding path program 1 times [2023-08-30 11:39:49,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:49,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733232468] [2023-08-30 11:39:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:39:50,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733232468] [2023-08-30 11:39:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733232468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007482153] [2023-08-30 11:39:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:50,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:50,593 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 11:39:50,597 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 11:39:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:50,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 11:39:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:39:50,838 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 11:39:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:39:50,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:50,903 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1056 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1056) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-30 11:39:50,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:39:50,916 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 46 treesize of output 38 [2023-08-30 11:39:50,931 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 11 treesize of output 5 [2023-08-30 11:39:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:39:50,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007482153] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:50,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:39:50,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 11:39:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825344596] [2023-08-30 11:39:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:39:50,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:39:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:39:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2023-08-30 11:39:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 470 [2023-08-30 11:39:51,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 281 transitions, 4549 flow. Second operand has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:51,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:51,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 470 [2023-08-30 11:39:51,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:39:57,194 INFO L130 PetriNetUnfolder]: 25586/38786 cut-off events. [2023-08-30 11:39:57,195 INFO L131 PetriNetUnfolder]: For 687166/687274 co-relation queries the response was YES. [2023-08-30 11:39:57,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322714 conditions, 38786 events. 25586/38786 cut-off events. For 687166/687274 co-relation queries the response was YES. Maximal size of possible extension queue 2229. Compared 286173 event pairs, 2942 based on Foata normal form. 268/31988 useless extension candidates. Maximal degree in co-relation 322634. Up to 22248 conditions per place. [2023-08-30 11:39:57,710 INFO L137 encePairwiseOnDemand]: 455/470 looper letters, 221 selfloop transitions, 142 changer transitions 0/365 dead transitions. [2023-08-30 11:39:57,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 365 transitions, 6466 flow [2023-08-30 11:39:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:39:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:39:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-08-30 11:39:57,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054711246200607 [2023-08-30 11:39:57,712 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-08-30 11:39:57,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-08-30 11:39:57,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:39:57,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-08-30 11:39:57,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:57,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:57,717 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:57,717 INFO L175 Difference]: Start difference. First operand has 213 places, 281 transitions, 4549 flow. Second operand 7 states and 1252 transitions. [2023-08-30 11:39:57,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 365 transitions, 6466 flow [2023-08-30 11:40:02,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 365 transitions, 6330 flow, removed 42 selfloop flow, removed 11 redundant places. [2023-08-30 11:40:02,753 INFO L231 Difference]: Finished difference. Result has 212 places, 314 transitions, 5648 flow [2023-08-30 11:40:02,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5648, PETRI_PLACES=212, PETRI_TRANSITIONS=314} [2023-08-30 11:40:02,754 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 155 predicate places. [2023-08-30 11:40:02,754 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 314 transitions, 5648 flow [2023-08-30 11:40:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:02,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:02,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:02,760 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 11:40:02,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:02,956 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:40:02,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash -28510239, now seen corresponding path program 2 times [2023-08-30 11:40:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:02,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500410563] [2023-08-30 11:40:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:02,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:03,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:03,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500410563] [2023-08-30 11:40:03,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500410563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:03,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599045641] [2023-08-30 11:40:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:40:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:03,932 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 11:40:03,936 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 11:40:04,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:40:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:40:04,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:40:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:04,183 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 11:40:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:40:04,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:40:04,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599045641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:40:04,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:40:04,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-30 11:40:04,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693940923] [2023-08-30 11:40:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:40:04,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:40:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:40:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:40:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 11:40:04,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 11:40:04,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 314 transitions, 5648 flow. Second operand has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:04,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:40:04,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 11:40:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:11,786 INFO L130 PetriNetUnfolder]: 27741/41703 cut-off events. [2023-08-30 11:40:11,787 INFO L131 PetriNetUnfolder]: For 1002328/1002436 co-relation queries the response was YES. [2023-08-30 11:40:12,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375276 conditions, 41703 events. 27741/41703 cut-off events. For 1002328/1002436 co-relation queries the response was YES. Maximal size of possible extension queue 2419. Compared 306990 event pairs, 4488 based on Foata normal form. 524/34141 useless extension candidates. Maximal degree in co-relation 375192. Up to 21722 conditions per place. [2023-08-30 11:40:12,521 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 288 selfloop transitions, 79 changer transitions 0/369 dead transitions. [2023-08-30 11:40:12,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 369 transitions, 7099 flow [2023-08-30 11:40:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:40:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:40:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1160 transitions. [2023-08-30 11:40:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-08-30 11:40:12,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1160 transitions. [2023-08-30 11:40:12,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1160 transitions. [2023-08-30 11:40:12,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:12,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1160 transitions. [2023-08-30 11:40:12,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.33333333333334) internal successors, (1160), 6 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:12,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:12,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:12,526 INFO L175 Difference]: Start difference. First operand has 212 places, 314 transitions, 5648 flow. Second operand 6 states and 1160 transitions. [2023-08-30 11:40:12,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 369 transitions, 7099 flow [2023-08-30 11:40:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 369 transitions, 6924 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-30 11:40:19,000 INFO L231 Difference]: Finished difference. Result has 217 places, 320 transitions, 5927 flow [2023-08-30 11:40:19,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=5439, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5927, PETRI_PLACES=217, PETRI_TRANSITIONS=320} [2023-08-30 11:40:19,000 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 160 predicate places. [2023-08-30 11:40:19,001 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 320 transitions, 5927 flow [2023-08-30 11:40:19,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:19,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:19,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:19,006 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 11:40:19,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:19,205 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:40:19,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:19,205 INFO L85 PathProgramCache]: Analyzing trace with hash -111879883, now seen corresponding path program 1 times [2023-08-30 11:40:19,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:19,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742400939] [2023-08-30 11:40:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742400939] [2023-08-30 11:40:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742400939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369006279] [2023-08-30 11:40:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:20,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:20,203 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 11:40:20,206 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 11:40:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:20,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:40:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:20,425 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 11:40:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:40:20,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:40:20,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:40:20,546 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 42 treesize of output 34 [2023-08-30 11:40:20,549 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 9 treesize of output 3 [2023-08-30 11:40:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:40:20,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369006279] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:20,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:40:20,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 20 [2023-08-30 11:40:20,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161423215] [2023-08-30 11:40:20,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:40:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:40:20,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:40:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:40:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=395, Unknown=6, NotChecked=0, Total=462 [2023-08-30 11:40:20,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 470 [2023-08-30 11:40:20,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 320 transitions, 5927 flow. Second operand has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:20,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:40:20,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 470 [2023-08-30 11:40:20,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:28,042 INFO L130 PetriNetUnfolder]: 27417/41153 cut-off events. [2023-08-30 11:40:28,042 INFO L131 PetriNetUnfolder]: For 1002321/1002429 co-relation queries the response was YES. [2023-08-30 11:40:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372427 conditions, 41153 events. 27417/41153 cut-off events. For 1002321/1002429 co-relation queries the response was YES. Maximal size of possible extension queue 2255. Compared 300291 event pairs, 3067 based on Foata normal form. 476/33489 useless extension candidates. Maximal degree in co-relation 372339. Up to 24146 conditions per place. [2023-08-30 11:40:28,615 INFO L137 encePairwiseOnDemand]: 458/470 looper letters, 210 selfloop transitions, 146 changer transitions 0/358 dead transitions. [2023-08-30 11:40:28,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 358 transitions, 7096 flow [2023-08-30 11:40:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:40:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:40:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1247 transitions. [2023-08-30 11:40:28,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790273556231003 [2023-08-30 11:40:28,617 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1247 transitions. [2023-08-30 11:40:28,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1247 transitions. [2023-08-30 11:40:28,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:28,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1247 transitions. [2023-08-30 11:40:28,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.14285714285714) internal successors, (1247), 7 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:28,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:28,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:28,620 INFO L175 Difference]: Start difference. First operand has 217 places, 320 transitions, 5927 flow. Second operand 7 states and 1247 transitions. [2023-08-30 11:40:28,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 358 transitions, 7096 flow [2023-08-30 11:40:36,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 358 transitions, 7005 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:40:36,340 INFO L231 Difference]: Finished difference. Result has 219 places, 316 transitions, 6041 flow [2023-08-30 11:40:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6041, PETRI_PLACES=219, PETRI_TRANSITIONS=316} [2023-08-30 11:40:36,341 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 162 predicate places. [2023-08-30 11:40:36,341 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 316 transitions, 6041 flow [2023-08-30 11:40:36,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:36,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:36,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:36,347 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 11:40:36,545 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,SelfDestructingSolverStorable27 [2023-08-30 11:40:36,546 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:40:36,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 592919247, now seen corresponding path program 1 times [2023-08-30 11:40:36,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:36,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948893997] [2023-08-30 11:40:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:40:36,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948893997] [2023-08-30 11:40:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948893997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:36,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294890259] [2023-08-30 11:40:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:36,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:36,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:36,653 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 11:40:36,680 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 11:40:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:40:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:40:36,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:40:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:40:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294890259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:40:36,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:40:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 11:40:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279407810] [2023-08-30 11:40:36,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:40:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:40:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:40:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:40:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:40:37,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-08-30 11:40:37,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 316 transitions, 6041 flow. Second operand has 12 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:37,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:40:37,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-08-30 11:40:37,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:44,311 INFO L130 PetriNetUnfolder]: 25374/38371 cut-off events. [2023-08-30 11:40:44,311 INFO L131 PetriNetUnfolder]: For 1106355/1106841 co-relation queries the response was YES. [2023-08-30 11:40:44,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353474 conditions, 38371 events. 25374/38371 cut-off events. For 1106355/1106841 co-relation queries the response was YES. Maximal size of possible extension queue 2250. Compared 281138 event pairs, 10500 based on Foata normal form. 1098/31579 useless extension candidates. Maximal degree in co-relation 353387. Up to 28224 conditions per place. [2023-08-30 11:40:45,050 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 434 selfloop transitions, 66 changer transitions 0/506 dead transitions. [2023-08-30 11:40:45,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 506 transitions, 10638 flow [2023-08-30 11:40:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:40:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:40:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1752 transitions. [2023-08-30 11:40:45,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418439716312055 [2023-08-30 11:40:45,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1752 transitions. [2023-08-30 11:40:45,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1752 transitions. [2023-08-30 11:40:45,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:45,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1752 transitions. [2023-08-30 11:40:45,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:45,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:45,058 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:45,058 INFO L175 Difference]: Start difference. First operand has 219 places, 316 transitions, 6041 flow. Second operand 9 states and 1752 transitions. [2023-08-30 11:40:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 506 transitions, 10638 flow [2023-08-30 11:40:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 506 transitions, 10179 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-30 11:40:51,060 INFO L231 Difference]: Finished difference. Result has 224 places, 355 transitions, 7190 flow [2023-08-30 11:40:51,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7190, PETRI_PLACES=224, PETRI_TRANSITIONS=355} [2023-08-30 11:40:51,063 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 167 predicate places. [2023-08-30 11:40:51,063 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 355 transitions, 7190 flow [2023-08-30 11:40:51,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:51,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:40:51,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:40:51,069 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 11:40:51,265 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,SelfDestructingSolverStorable28 [2023-08-30 11:40:51,266 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:40:51,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:40:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 475891199, now seen corresponding path program 2 times [2023-08-30 11:40:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:40:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606562837] [2023-08-30 11:40:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:40:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:40:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:40:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:40:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:40:52,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606562837] [2023-08-30 11:40:52,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606562837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:40:52,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309613726] [2023-08-30 11:40:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:40:52,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:40:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:40:52,349 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 11:40:52,368 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 11:40:52,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:40:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:40:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:40:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:40:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:40:52,637 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 11:40:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:40:52,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:40:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309613726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:40:52,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:40:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-30 11:40:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766354603] [2023-08-30 11:40:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:40:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:40:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:40:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:40:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 11:40:52,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-08-30 11:40:52,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 355 transitions, 7190 flow. Second operand has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:52,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:40:52,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-08-30 11:40:52,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:59,984 INFO L130 PetriNetUnfolder]: 26397/40040 cut-off events. [2023-08-30 11:40:59,985 INFO L131 PetriNetUnfolder]: For 946115/946223 co-relation queries the response was YES. [2023-08-30 11:41:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362677 conditions, 40040 events. 26397/40040 cut-off events. For 946115/946223 co-relation queries the response was YES. Maximal size of possible extension queue 2404. Compared 298213 event pairs, 5858 based on Foata normal form. 128/31953 useless extension candidates. Maximal degree in co-relation 362587. Up to 24909 conditions per place. [2023-08-30 11:41:00,575 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 308 selfloop transitions, 94 changer transitions 0/404 dead transitions. [2023-08-30 11:41:00,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 404 transitions, 8506 flow [2023-08-30 11:41:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:41:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:41:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1165 transitions. [2023-08-30 11:41:00,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-08-30 11:41:00,577 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1165 transitions. [2023-08-30 11:41:00,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1165 transitions. [2023-08-30 11:41:00,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:41:00,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1165 transitions. [2023-08-30 11:41:00,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.16666666666666) internal successors, (1165), 6 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:00,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:00,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:00,580 INFO L175 Difference]: Start difference. First operand has 224 places, 355 transitions, 7190 flow. Second operand 6 states and 1165 transitions. [2023-08-30 11:41:00,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 404 transitions, 8506 flow [2023-08-30 11:41:06,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 404 transitions, 8479 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 11:41:06,949 INFO L231 Difference]: Finished difference. Result has 226 places, 358 transitions, 7600 flow [2023-08-30 11:41:06,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7600, PETRI_PLACES=226, PETRI_TRANSITIONS=358} [2023-08-30 11:41:06,950 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2023-08-30 11:41:06,950 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 358 transitions, 7600 flow [2023-08-30 11:41:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:06,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:41:06,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:41:06,956 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 11:41:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:41:07,152 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:41:07,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:41:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1284741016, now seen corresponding path program 2 times [2023-08-30 11:41:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:41:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720356431] [2023-08-30 11:41:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:41:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:41:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:41:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:41:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:41:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720356431] [2023-08-30 11:41:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720356431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:41:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043428453] [2023-08-30 11:41:07,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:41:07,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:41:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:41:07,665 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 11:41:07,697 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 11:41:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:41:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:41:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:41:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:41:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:41:08,159 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 11:41:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:41:08,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:41:08,220 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1328 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1328) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-30 11:41:08,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:41:08,268 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 46 treesize of output 38 [2023-08-30 11:41:08,272 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 11 treesize of output 5 [2023-08-30 11:41:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:41:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043428453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:41:08,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:41:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 11:41:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845869595] [2023-08-30 11:41:08,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:41:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:41:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:41:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:41:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=457, Unknown=1, NotChecked=44, Total=600 [2023-08-30 11:41:08,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 470 [2023-08-30 11:41:08,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 358 transitions, 7600 flow. Second operand has 25 states, 25 states have (on average 148.8) internal successors, (3720), 25 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:08,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:41:08,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 470 [2023-08-30 11:41:08,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:41:35,825 INFO L130 PetriNetUnfolder]: 83111/120993 cut-off events. [2023-08-30 11:41:35,825 INFO L131 PetriNetUnfolder]: For 4421095/4421272 co-relation queries the response was YES. [2023-08-30 11:41:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150187 conditions, 120993 events. 83111/120993 cut-off events. For 4421095/4421272 co-relation queries the response was YES. Maximal size of possible extension queue 6452. Compared 962405 event pairs, 5086 based on Foata normal form. 7481/100501 useless extension candidates. Maximal degree in co-relation 1150095. Up to 60205 conditions per place. [2023-08-30 11:41:37,908 INFO L137 encePairwiseOnDemand]: 448/470 looper letters, 735 selfloop transitions, 462 changer transitions 0/1199 dead transitions. [2023-08-30 11:41:37,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1199 transitions, 25842 flow [2023-08-30 11:41:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 11:41:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 11:41:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 7457 transitions. [2023-08-30 11:41:37,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33757356269805344 [2023-08-30 11:41:37,915 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 7457 transitions. [2023-08-30 11:41:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 7457 transitions. [2023-08-30 11:41:37,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:41:37,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 7457 transitions. [2023-08-30 11:41:37,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 158.6595744680851) internal successors, (7457), 47 states have internal predecessors, (7457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:37,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 470.0) internal successors, (22560), 48 states have internal predecessors, (22560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:37,943 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 470.0) internal successors, (22560), 48 states have internal predecessors, (22560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:41:37,944 INFO L175 Difference]: Start difference. First operand has 226 places, 358 transitions, 7600 flow. Second operand 47 states and 7457 transitions. [2023-08-30 11:41:37,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1199 transitions, 25842 flow [2023-08-30 11:42:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1199 transitions, 25453 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 11:42:10,946 INFO L231 Difference]: Finished difference. Result has 300 places, 698 transitions, 17690 flow [2023-08-30 11:42:10,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=17690, PETRI_PLACES=300, PETRI_TRANSITIONS=698} [2023-08-30 11:42:10,947 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 243 predicate places. [2023-08-30 11:42:10,947 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 698 transitions, 17690 flow [2023-08-30 11:42:10,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.8) internal successors, (3720), 25 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:10,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:42:10,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:42:10,952 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 11:42:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:42:11,148 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:42:11,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:42:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash 794405040, now seen corresponding path program 1 times [2023-08-30 11:42:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:42:11,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367856883] [2023-08-30 11:42:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:42:11,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:42:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:42:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:42:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:42:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367856883] [2023-08-30 11:42:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367856883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:42:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127437667] [2023-08-30 11:42:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:42:12,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:42:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:42:12,201 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 11:42:12,204 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 11:42:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:42:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:42:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:42:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:42:12,445 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 11:42:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:42:12,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:42:12,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:42:12,565 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 42 treesize of output 34 [2023-08-30 11:42:12,568 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 9 treesize of output 3 [2023-08-30 11:42:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:42:12,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127437667] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:42:12,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:42:12,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 21 [2023-08-30 11:42:12,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435883978] [2023-08-30 11:42:12,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:42:12,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:42:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:42:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:42:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=433, Unknown=3, NotChecked=0, Total=506 [2023-08-30 11:42:12,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 470 [2023-08-30 11:42:12,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 698 transitions, 17690 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:12,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:42:12,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 470 [2023-08-30 11:42:12,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:42:46,791 INFO L130 PetriNetUnfolder]: 83372/121136 cut-off events. [2023-08-30 11:42:46,791 INFO L131 PetriNetUnfolder]: For 5704737/5704773 co-relation queries the response was YES. [2023-08-30 11:42:48,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405857 conditions, 121136 events. 83372/121136 cut-off events. For 5704737/5704773 co-relation queries the response was YES. Maximal size of possible extension queue 6453. Compared 954885 event pairs, 10365 based on Foata normal form. 76/93071 useless extension candidates. Maximal degree in co-relation 1405733. Up to 76043 conditions per place. [2023-08-30 11:42:49,524 INFO L137 encePairwiseOnDemand]: 458/470 looper letters, 478 selfloop transitions, 315 changer transitions 0/795 dead transitions. [2023-08-30 11:42:49,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 795 transitions, 20925 flow [2023-08-30 11:42:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:42:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:42:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1293 transitions. [2023-08-30 11:42:49,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39300911854103343 [2023-08-30 11:42:49,527 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1293 transitions. [2023-08-30 11:42:49,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1293 transitions. [2023-08-30 11:42:49,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:42:49,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1293 transitions. [2023-08-30 11:42:49,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.71428571428572) internal successors, (1293), 7 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:49,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:49,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:49,530 INFO L175 Difference]: Start difference. First operand has 300 places, 698 transitions, 17690 flow. Second operand 7 states and 1293 transitions. [2023-08-30 11:42:49,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 795 transitions, 20925 flow [2023-08-30 11:44:16,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 795 transitions, 19296 flow, removed 809 selfloop flow, removed 4 redundant places. [2023-08-30 11:44:16,956 INFO L231 Difference]: Finished difference. Result has 302 places, 696 transitions, 17014 flow [2023-08-30 11:44:16,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=16384, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17014, PETRI_PLACES=302, PETRI_TRANSITIONS=696} [2023-08-30 11:44:16,957 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 245 predicate places. [2023-08-30 11:44:16,957 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 696 transitions, 17014 flow [2023-08-30 11:44:16,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:44:16,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:44:16,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:44:16,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 11:44:17,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:44:17,161 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-08-30 11:44:17,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:44:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash 573891224, now seen corresponding path program 2 times [2023-08-30 11:44:17,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:44:17,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885430292] [2023-08-30 11:44:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:44:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:44:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:44:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:44:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:44:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885430292] [2023-08-30 11:44:18,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885430292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:44:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24205318] [2023-08-30 11:44:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:44:18,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:44:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:44:18,170 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:44:18,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 11:44:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:44:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:44:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:44:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:44:18,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:44:18,445 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 11:44:18,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:44:18,477 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 11:44:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:44:18,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:44:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24205318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:44:18,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:44:18,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-30 11:44:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638720755] [2023-08-30 11:44:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:44:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:44:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:44:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:44:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-30 11:44:18,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 470 [2023-08-30 11:44:18,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 696 transitions, 17014 flow. Second operand has 8 states, 8 states have (on average 180.625) internal successors, (1445), 8 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:44:18,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:44:18,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 470 [2023-08-30 11:44:18,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand