./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:08:37,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:08:37,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:08:37,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:08:37,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:08:37,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:08:37,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:08:37,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:08:37,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:08:37,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:08:37,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:08:37,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:08:37,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:08:37,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:08:37,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:08:37,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:08:37,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:08:37,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:08:37,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:08:37,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:08:37,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:08:37,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:08:37,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:08:37,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:08:37,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:08:37,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:08:37,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:08:37,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:08:37,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:08:37,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:08:37,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:08:37,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:08:37,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:08:37,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:08:37,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:08:37,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:08:37,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:08:37,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:08:37,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:08:37,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:08:37,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:08:37,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:08:37,275 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:08:37,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:08:37,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:08:37,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:08:37,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:08:37,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:08:37,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:08:37,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:08:37,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:08:37,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:08:37,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:08:37,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:08:37,279 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:08:37,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:08:37,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:08:37,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:08:37,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:08:37,564 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:08:37,564 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:08:37,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 15:08:38,488 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:08:38,683 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:08:38,683 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 15:08:38,687 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eacab21/449f081d991d496e91553b1ffe79d27c/FLAG2c351acab [2023-08-30 15:08:38,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eacab21/449f081d991d496e91553b1ffe79d27c [2023-08-30 15:08:38,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:08:38,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:08:38,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:08:38,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:08:38,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:08:38,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f4f5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38, skipping insertion in model container [2023-08-30 15:08:38,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:08:38,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:08:38,809 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 15:08:38,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:08:38,815 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:08:38,846 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/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 15:08:38,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:08:38,853 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:08:38,854 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:08:38,858 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:08:38,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38 WrapperNode [2023-08-30 15:08:38,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:08:38,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:08:38,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:08:38,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:08:38,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,897 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-08-30 15:08:38,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:08:38,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:08:38,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:08:38,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:08:38,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:08:38,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:08:38,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:08:38,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:08:38,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (1/1) ... [2023-08-30 15:08:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:08:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:38,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:08:38,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:08:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:08:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:08:38,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:08:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:08:38,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:08:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:08:38,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:08:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:08:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:08:38,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:08:38,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:08:38,999 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:08:39,070 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:08:39,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:08:39,223 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:08:39,305 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:08:39,305 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 15:08:39,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:08:39 BoogieIcfgContainer [2023-08-30 15:08:39,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:08:39,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:08:39,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:08:39,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:08:39,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:08:38" (1/3) ... [2023-08-30 15:08:39,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c27267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:08:39, skipping insertion in model container [2023-08-30 15:08:39,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:38" (2/3) ... [2023-08-30 15:08:39,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c27267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:08:39, skipping insertion in model container [2023-08-30 15:08:39,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:08:39" (3/3) ... [2023-08-30 15:08:39,313 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-30 15:08:39,318 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:08:39,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:08:39,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 15:08:39,329 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:08:39,438 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 15:08:39,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 15:08:39,513 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2023-08-30 15:08:39,513 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:08:39,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-30 15:08:39,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 15:08:39,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 196 flow [2023-08-30 15:08:39,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:08:39,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 196 flow [2023-08-30 15:08:39,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 196 flow [2023-08-30 15:08:39,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 196 flow [2023-08-30 15:08:39,597 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-08-30 15:08:39,598 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:08:39,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 92 events. 7/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 113 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-30 15:08:39,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 1604 [2023-08-30 15:08:41,964 INFO L134 LiptonReduction]: Checked pairs total: 1874 [2023-08-30 15:08:41,964 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 15:08:41,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:08:41,980 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;@6f79c92f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:08:41,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-30 15:08:41,984 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-30 15:08:41,984 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:08:41,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:41,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:08:41,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:41,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash 13360126, now seen corresponding path program 1 times [2023-08-30 15:08:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:41,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068032726] [2023-08-30 15:08:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:42,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068032726] [2023-08-30 15:08:42,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068032726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:08:42,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:08:42,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:08:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940546011] [2023-08-30 15:08:42,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:08:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:08:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:08:42,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:08:42,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 15:08:42,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:42,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 15:08:42,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:42,462 INFO L130 PetriNetUnfolder]: 1323/1787 cut-off events. [2023-08-30 15:08:42,462 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-30 15:08:42,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 1787 events. 1323/1787 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7192 event pairs, 231 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 3479. Up to 1713 conditions per place. [2023-08-30 15:08:42,474 INFO L137 encePairwiseOnDemand]: 186/197 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-30 15:08:42,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 169 flow [2023-08-30 15:08:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:08:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:08:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-30 15:08:42,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109983079526227 [2023-08-30 15:08:42,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-30 15:08:42,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-30 15:08:42,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:42,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-30 15:08:42,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,520 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 64 flow. Second operand 3 states and 302 transitions. [2023-08-30 15:08:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 169 flow [2023-08-30 15:08:42,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:08:42,524 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 91 flow [2023-08-30 15:08:42,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 15:08:42,527 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-08-30 15:08:42,527 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 91 flow [2023-08-30 15:08:42,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:42,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:08:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:08:42,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:42,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -45806983, now seen corresponding path program 1 times [2023-08-30 15:08:42,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:42,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152749629] [2023-08-30 15:08:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152749629] [2023-08-30 15:08:42,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152749629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:08:42,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:08:42,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:08:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35393863] [2023-08-30 15:08:42,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:08:42,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:08:42,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:08:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:08:42,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 15:08:42,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:42,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 15:08:42,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:42,715 INFO L130 PetriNetUnfolder]: 993/1361 cut-off events. [2023-08-30 15:08:42,716 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 15:08:42,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1361 events. 993/1361 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5659 event pairs, 539 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 2011. Up to 1357 conditions per place. [2023-08-30 15:08:42,721 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 15:08:42,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 131 flow [2023-08-30 15:08:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:08:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:08:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-30 15:08:42,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47715736040609136 [2023-08-30 15:08:42,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-30 15:08:42,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-30 15:08:42,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:42,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-30 15:08:42,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,726 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 91 flow. Second operand 3 states and 282 transitions. [2023-08-30 15:08:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 131 flow [2023-08-30 15:08:42,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:08:42,727 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 82 flow [2023-08-30 15:08:42,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 15:08:42,728 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-30 15:08:42,728 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 82 flow [2023-08-30 15:08:42,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:42,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:42,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:08:42,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:08:42,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:42,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:42,729 INFO L85 PathProgramCache]: Analyzing trace with hash -45806981, now seen corresponding path program 1 times [2023-08-30 15:08:42,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769405796] [2023-08-30 15:08:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:42,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:42,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769405796] [2023-08-30 15:08:42,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769405796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3318943] [2023-08-30 15:08:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:42,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:42,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:08:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:08:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3318943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:43,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:43,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 15:08:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462137195] [2023-08-30 15:08:43,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:08:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:08:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:08:43,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-30 15:08:43,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:43,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-30 15:08:43,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:43,422 INFO L130 PetriNetUnfolder]: 2165/3031 cut-off events. [2023-08-30 15:08:43,422 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 15:08:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 3031 events. 2165/3031 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13315 event pairs, 35 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 7746. Up to 1415 conditions per place. [2023-08-30 15:08:43,433 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 87 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2023-08-30 15:08:43,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 117 transitions, 575 flow [2023-08-30 15:08:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:08:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:08:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-30 15:08:43,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49555837563451777 [2023-08-30 15:08:43,436 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-30 15:08:43,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-30 15:08:43,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:43,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-30 15:08:43,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,441 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,441 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 82 flow. Second operand 8 states and 781 transitions. [2023-08-30 15:08:43,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 117 transitions, 575 flow [2023-08-30 15:08:43,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 117 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:08:43,443 INFO L231 Difference]: Finished difference. Result has 41 places, 50 transitions, 280 flow [2023-08-30 15:08:43,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=41, PETRI_TRANSITIONS=50} [2023-08-30 15:08:43,444 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 15:08:43,444 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 50 transitions, 280 flow [2023-08-30 15:08:43,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:43,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:08:43,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:08:43,655 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 15:08:43,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:43,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2094255097, now seen corresponding path program 1 times [2023-08-30 15:08:43,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:43,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241273796] [2023-08-30 15:08:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241273796] [2023-08-30 15:08:43,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241273796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:08:43,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:08:43,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:08:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659197041] [2023-08-30 15:08:43,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:08:43,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:08:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:43,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:08:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:08:43,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:08:43,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 50 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:43,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:43,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:08:43,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:44,145 INFO L130 PetriNetUnfolder]: 2149/3089 cut-off events. [2023-08-30 15:08:44,146 INFO L131 PetriNetUnfolder]: For 2478/2478 co-relation queries the response was YES. [2023-08-30 15:08:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9838 conditions, 3089 events. 2149/3089 cut-off events. For 2478/2478 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14213 event pairs, 63 based on Foata normal form. 76/2771 useless extension candidates. Maximal degree in co-relation 9826. Up to 2305 conditions per place. [2023-08-30 15:08:44,159 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 63 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-08-30 15:08:44,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 517 flow [2023-08-30 15:08:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:08:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:08:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-30 15:08:44,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543147208121827 [2023-08-30 15:08:44,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-30 15:08:44,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-30 15:08:44,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:44,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-30 15:08:44,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:44,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:44,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:44,163 INFO L175 Difference]: Start difference. First operand has 41 places, 50 transitions, 280 flow. Second operand 4 states and 358 transitions. [2023-08-30 15:08:44,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 517 flow [2023-08-30 15:08:44,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 498 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 15:08:44,168 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 360 flow [2023-08-30 15:08:44,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2023-08-30 15:08:44,168 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-30 15:08:44,169 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 360 flow [2023-08-30 15:08:44,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:44,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:44,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:08:44,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:08:44,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:44,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2094252108, now seen corresponding path program 1 times [2023-08-30 15:08:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:44,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652095390] [2023-08-30 15:08:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:44,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652095390] [2023-08-30 15:08:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652095390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228890802] [2023-08-30 15:08:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:44,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:44,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:44,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:44,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:08:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:08:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:44,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228890802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:44,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 15:08:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848606020] [2023-08-30 15:08:44,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:08:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:08:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:08:44,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-30 15:08:44,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:44,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:44,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-30 15:08:44,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:45,121 INFO L130 PetriNetUnfolder]: 2697/3791 cut-off events. [2023-08-30 15:08:45,122 INFO L131 PetriNetUnfolder]: For 7118/7118 co-relation queries the response was YES. [2023-08-30 15:08:45,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 3791 events. 2697/3791 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17168 event pairs, 41 based on Foata normal form. 180/3519 useless extension candidates. Maximal degree in co-relation 12904. Up to 1477 conditions per place. [2023-08-30 15:08:45,141 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 86 selfloop transitions, 55 changer transitions 0/143 dead transitions. [2023-08-30 15:08:45,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 143 transitions, 1023 flow [2023-08-30 15:08:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:08:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:08:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2023-08-30 15:08:45,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873096446700508 [2023-08-30 15:08:45,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2023-08-30 15:08:45,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2023-08-30 15:08:45,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:45,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2023-08-30 15:08:45,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:45,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:45,147 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:45,147 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 360 flow. Second operand 8 states and 768 transitions. [2023-08-30 15:08:45,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 143 transitions, 1023 flow [2023-08-30 15:08:45,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 143 transitions, 988 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 15:08:45,170 INFO L231 Difference]: Finished difference. Result has 53 places, 82 transitions, 716 flow [2023-08-30 15:08:45,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=53, PETRI_TRANSITIONS=82} [2023-08-30 15:08:45,171 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-30 15:08:45,171 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 82 transitions, 716 flow [2023-08-30 15:08:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:45,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:45,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 15:08:45,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:08:45,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:45,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:45,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1070822922, now seen corresponding path program 1 times [2023-08-30 15:08:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:45,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180465214] [2023-08-30 15:08:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:45,510 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 15:08:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180465214] [2023-08-30 15:08:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180465214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972155435] [2023-08-30 15:08:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:45,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:45,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:45,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:08:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:08:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:45,666 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 15:08:45,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:45,833 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 15:08:45,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972155435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:45,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:45,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-08-30 15:08:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643858719] [2023-08-30 15:08:45,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:45,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:08:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:08:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:08:45,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 15:08:45,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 82 transitions, 716 flow. Second operand has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:45,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:45,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 15:08:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:46,543 INFO L130 PetriNetUnfolder]: 3007/4487 cut-off events. [2023-08-30 15:08:46,544 INFO L131 PetriNetUnfolder]: For 14638/14638 co-relation queries the response was YES. [2023-08-30 15:08:46,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16334 conditions, 4487 events. 3007/4487 cut-off events. For 14638/14638 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23097 event pairs, 65 based on Foata normal form. 446/4931 useless extension candidates. Maximal degree in co-relation 16316. Up to 1279 conditions per place. [2023-08-30 15:08:46,570 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 139 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2023-08-30 15:08:46,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 210 transitions, 1548 flow [2023-08-30 15:08:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:08:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:08:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1490 transitions. [2023-08-30 15:08:46,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727157360406091 [2023-08-30 15:08:46,573 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1490 transitions. [2023-08-30 15:08:46,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1490 transitions. [2023-08-30 15:08:46,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:46,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1490 transitions. [2023-08-30 15:08:46,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.125) internal successors, (1490), 16 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:46,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:46,580 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:46,580 INFO L175 Difference]: Start difference. First operand has 53 places, 82 transitions, 716 flow. Second operand 16 states and 1490 transitions. [2023-08-30 15:08:46,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 210 transitions, 1548 flow [2023-08-30 15:08:46,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 210 transitions, 1406 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-08-30 15:08:46,678 INFO L231 Difference]: Finished difference. Result has 67 places, 96 transitions, 939 flow [2023-08-30 15:08:46,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=939, PETRI_PLACES=67, PETRI_TRANSITIONS=96} [2023-08-30 15:08:46,679 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-08-30 15:08:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 96 transitions, 939 flow [2023-08-30 15:08:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:46,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:46,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:08:46,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:08:46,884 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 15:08:46,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:46,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1763394028, now seen corresponding path program 1 times [2023-08-30 15:08:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:46,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426838857] [2023-08-30 15:08:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:46,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426838857] [2023-08-30 15:08:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426838857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060523297] [2023-08-30 15:08:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:47,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:47,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:08:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:08:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:47,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060523297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:47,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 15:08:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210550589] [2023-08-30 15:08:47,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:47,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:08:47,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:08:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:08:47,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 197 [2023-08-30 15:08:47,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 96 transitions, 939 flow. Second operand has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:47,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:47,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 197 [2023-08-30 15:08:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:48,684 INFO L130 PetriNetUnfolder]: 3953/5917 cut-off events. [2023-08-30 15:08:48,684 INFO L131 PetriNetUnfolder]: For 24924/24924 co-relation queries the response was YES. [2023-08-30 15:08:48,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24165 conditions, 5917 events. 3953/5917 cut-off events. For 24924/24924 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31928 event pairs, 313 based on Foata normal form. 100/6009 useless extension candidates. Maximal degree in co-relation 24142. Up to 3417 conditions per place. [2023-08-30 15:08:48,715 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 179 selfloop transitions, 79 changer transitions 0/260 dead transitions. [2023-08-30 15:08:48,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 260 transitions, 2425 flow [2023-08-30 15:08:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:08:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:08:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1194 transitions. [2023-08-30 15:08:48,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43292240754169686 [2023-08-30 15:08:48,718 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1194 transitions. [2023-08-30 15:08:48,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1194 transitions. [2023-08-30 15:08:48,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:48,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1194 transitions. [2023-08-30 15:08:48,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:48,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:48,726 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:48,726 INFO L175 Difference]: Start difference. First operand has 67 places, 96 transitions, 939 flow. Second operand 14 states and 1194 transitions. [2023-08-30 15:08:48,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 260 transitions, 2425 flow [2023-08-30 15:08:48,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 260 transitions, 2317 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-08-30 15:08:48,761 INFO L231 Difference]: Finished difference. Result has 88 places, 155 transitions, 1864 flow [2023-08-30 15:08:48,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1864, PETRI_PLACES=88, PETRI_TRANSITIONS=155} [2023-08-30 15:08:48,762 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-08-30 15:08:48,764 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 155 transitions, 1864 flow [2023-08-30 15:08:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:48,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:48,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2023-08-30 15:08:48,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 15:08:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:48,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:48,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1731336819, now seen corresponding path program 2 times [2023-08-30 15:08:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236352732] [2023-08-30 15:08:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:08:49,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:49,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236352732] [2023-08-30 15:08:49,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236352732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:49,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015571047] [2023-08-30 15:08:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:08:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:49,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:49,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:08:49,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:08:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:08:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:08:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:49,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015571047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:49,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:49,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 15:08:49,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259259099] [2023-08-30 15:08:49,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:49,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:08:49,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:08:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:08:49,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 15:08:49,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 155 transitions, 1864 flow. Second operand has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:49,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:49,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 15:08:49,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:50,769 INFO L130 PetriNetUnfolder]: 5437/8197 cut-off events. [2023-08-30 15:08:50,769 INFO L131 PetriNetUnfolder]: For 59174/59174 co-relation queries the response was YES. [2023-08-30 15:08:50,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 8197 events. 5437/8197 cut-off events. For 59174/59174 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46728 event pairs, 179 based on Foata normal form. 558/8753 useless extension candidates. Maximal degree in co-relation 36906. Up to 1464 conditions per place. [2023-08-30 15:08:50,826 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 193 selfloop transitions, 161 changer transitions 7/363 dead transitions. [2023-08-30 15:08:50,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 363 transitions, 3993 flow [2023-08-30 15:08:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:08:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:08:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1580 transitions. [2023-08-30 15:08:50,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47178262167811286 [2023-08-30 15:08:50,830 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1580 transitions. [2023-08-30 15:08:50,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1580 transitions. [2023-08-30 15:08:50,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:50,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1580 transitions. [2023-08-30 15:08:50,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.94117647058823) internal successors, (1580), 17 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:50,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:50,837 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:50,837 INFO L175 Difference]: Start difference. First operand has 88 places, 155 transitions, 1864 flow. Second operand 17 states and 1580 transitions. [2023-08-30 15:08:50,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 363 transitions, 3993 flow [2023-08-30 15:08:51,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 363 transitions, 3675 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-08-30 15:08:51,031 INFO L231 Difference]: Finished difference. Result has 107 places, 216 transitions, 2983 flow [2023-08-30 15:08:51,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2983, PETRI_PLACES=107, PETRI_TRANSITIONS=216} [2023-08-30 15:08:51,034 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 73 predicate places. [2023-08-30 15:08:51,034 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 216 transitions, 2983 flow [2023-08-30 15:08:51,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:51,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:51,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:08:51,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:08:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:51,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:51,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1474241966, now seen corresponding path program 1 times [2023-08-30 15:08:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:51,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613465103] [2023-08-30 15:08:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:51,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613465103] [2023-08-30 15:08:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613465103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544951148] [2023-08-30 15:08:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:51,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:51,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:08:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:08:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:51,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:08:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544951148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:51,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:51,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 15:08:51,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224376633] [2023-08-30 15:08:51,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:51,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:08:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:08:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:08:52,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:08:52,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 216 transitions, 2983 flow. Second operand has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:52,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:52,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:08:52,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:54,638 INFO L130 PetriNetUnfolder]: 9901/14819 cut-off events. [2023-08-30 15:08:54,639 INFO L131 PetriNetUnfolder]: For 150170/150170 co-relation queries the response was YES. [2023-08-30 15:08:54,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72758 conditions, 14819 events. 9901/14819 cut-off events. For 150170/150170 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 90561 event pairs, 127 based on Foata normal form. 954/15771 useless extension candidates. Maximal degree in co-relation 72718. Up to 2715 conditions per place. [2023-08-30 15:08:54,724 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 307 selfloop transitions, 412 changer transitions 10/731 dead transitions. [2023-08-30 15:08:54,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 731 transitions, 9035 flow [2023-08-30 15:08:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 15:08:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 15:08:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3011 transitions. [2023-08-30 15:08:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44953717527620185 [2023-08-30 15:08:54,730 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3011 transitions. [2023-08-30 15:08:54,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3011 transitions. [2023-08-30 15:08:54,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:54,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3011 transitions. [2023-08-30 15:08:54,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 88.55882352941177) internal successors, (3011), 34 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:54,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:54,742 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:54,742 INFO L175 Difference]: Start difference. First operand has 107 places, 216 transitions, 2983 flow. Second operand 34 states and 3011 transitions. [2023-08-30 15:08:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 731 transitions, 9035 flow [2023-08-30 15:08:55,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 731 transitions, 8315 flow, removed 243 selfloop flow, removed 8 redundant places. [2023-08-30 15:08:55,446 INFO L231 Difference]: Finished difference. Result has 143 places, 466 transitions, 7293 flow [2023-08-30 15:08:55,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7293, PETRI_PLACES=143, PETRI_TRANSITIONS=466} [2023-08-30 15:08:55,446 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 109 predicate places. [2023-08-30 15:08:55,447 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 466 transitions, 7293 flow [2023-08-30 15:08:55,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:55,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:08:55,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:08:55,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 15:08:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:55,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:08:55,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:08:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -350204012, now seen corresponding path program 1 times [2023-08-30 15:08:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:08:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716819991] [2023-08-30 15:08:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:08:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:55,853 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 15:08:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:08:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716819991] [2023-08-30 15:08:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716819991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:08:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93006077] [2023-08-30 15:08:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:08:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:08:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:55,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:08:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:08:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:08:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:08:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:08:56,125 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 15:08:56,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:08:56,311 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 15:08:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93006077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:08:56,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:08:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-08-30 15:08:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875910439] [2023-08-30 15:08:56,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:08:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:08:56,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:08:56,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:08:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:08:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-30 15:08:56,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 466 transitions, 7293 flow. Second operand has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:56,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:08:56,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-30 15:08:56,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:08:58,873 INFO L130 PetriNetUnfolder]: 11063/16757 cut-off events. [2023-08-30 15:08:58,873 INFO L131 PetriNetUnfolder]: For 200538/200538 co-relation queries the response was YES. [2023-08-30 15:08:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86750 conditions, 16757 events. 11063/16757 cut-off events. For 200538/200538 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 107193 event pairs, 679 based on Foata normal form. 1168/17923 useless extension candidates. Maximal degree in co-relation 86702. Up to 5946 conditions per place. [2023-08-30 15:08:58,995 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 247 selfloop transitions, 337 changer transitions 22/608 dead transitions. [2023-08-30 15:08:58,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 608 transitions, 9801 flow [2023-08-30 15:08:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:08:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:08:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-08-30 15:08:58,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488155668358714 [2023-08-30 15:08:58,997 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-08-30 15:08:58,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-08-30 15:08:58,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:08:58,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-08-30 15:08:58,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:59,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:59,002 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:08:59,002 INFO L175 Difference]: Start difference. First operand has 143 places, 466 transitions, 7293 flow. Second operand 12 states and 1061 transitions. [2023-08-30 15:08:59,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 608 transitions, 9801 flow [2023-08-30 15:09:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 608 transitions, 8305 flow, removed 667 selfloop flow, removed 7 redundant places. [2023-08-30 15:09:00,151 INFO L231 Difference]: Finished difference. Result has 153 places, 513 transitions, 7775 flow [2023-08-30 15:09:00,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7775, PETRI_PLACES=153, PETRI_TRANSITIONS=513} [2023-08-30 15:09:00,152 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2023-08-30 15:09:00,152 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 513 transitions, 7775 flow [2023-08-30 15:09:00,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:00,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:00,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:00,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:00,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:00,359 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:09:00,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1890407148, now seen corresponding path program 2 times [2023-08-30 15:09:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629146916] [2023-08-30 15:09:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:00,559 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 15:09:00,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629146916] [2023-08-30 15:09:00,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629146916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571285567] [2023-08-30 15:09:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:09:00,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:00,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:00,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:00,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:09:00,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:09:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:09:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:09:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:00,755 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 15:09:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:01,370 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 15:09:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571285567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:01,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 15:09:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649936078] [2023-08-30 15:09:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:09:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:09:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:09:01,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 197 [2023-08-30 15:09:01,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 513 transitions, 7775 flow. Second operand has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:01,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:01,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 197 [2023-08-30 15:09:01,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:04,443 INFO L130 PetriNetUnfolder]: 13555/20411 cut-off events. [2023-08-30 15:09:04,443 INFO L131 PetriNetUnfolder]: For 189894/189894 co-relation queries the response was YES. [2023-08-30 15:09:04,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103407 conditions, 20411 events. 13555/20411 cut-off events. For 189894/189894 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 131862 event pairs, 767 based on Foata normal form. 262/20671 useless extension candidates. Maximal degree in co-relation 103358. Up to 10943 conditions per place. [2023-08-30 15:09:04,605 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 394 selfloop transitions, 372 changer transitions 18/786 dead transitions. [2023-08-30 15:09:04,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 786 transitions, 12036 flow [2023-08-30 15:09:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:09:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:09:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1447 transitions. [2023-08-30 15:09:04,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590736040609137 [2023-08-30 15:09:04,608 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1447 transitions. [2023-08-30 15:09:04,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1447 transitions. [2023-08-30 15:09:04,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:04,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1447 transitions. [2023-08-30 15:09:04,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.4375) internal successors, (1447), 16 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:04,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:04,613 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:04,613 INFO L175 Difference]: Start difference. First operand has 153 places, 513 transitions, 7775 flow. Second operand 16 states and 1447 transitions. [2023-08-30 15:09:04,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 786 transitions, 12036 flow [2023-08-30 15:09:06,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 786 transitions, 11793 flow, removed 118 selfloop flow, removed 3 redundant places. [2023-08-30 15:09:06,542 INFO L231 Difference]: Finished difference. Result has 172 places, 644 transitions, 11060 flow [2023-08-30 15:09:06,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11060, PETRI_PLACES=172, PETRI_TRANSITIONS=644} [2023-08-30 15:09:06,543 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-08-30 15:09:06,543 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 644 transitions, 11060 flow [2023-08-30 15:09:06,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:06,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:06,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 15:09:06,749 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:09:06,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1543992597, now seen corresponding path program 1 times [2023-08-30 15:09:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:06,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589132399] [2023-08-30 15:09:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:07,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589132399] [2023-08-30 15:09:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589132399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419217040] [2023-08-30 15:09:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:07,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:07,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:07,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:09:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 15:09:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:07,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419217040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:08,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:08,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:09:08,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406268452] [2023-08-30 15:09:08,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:08,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:09:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:09:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:09:08,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:09:08,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 644 transitions, 11060 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:08,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:09:08,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:19,846 INFO L130 PetriNetUnfolder]: 28973/43331 cut-off events. [2023-08-30 15:09:19,847 INFO L131 PetriNetUnfolder]: For 453510/453510 co-relation queries the response was YES. [2023-08-30 15:09:20,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221983 conditions, 43331 events. 28973/43331 cut-off events. For 453510/453510 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 309885 event pairs, 397 based on Foata normal form. 1916/45245 useless extension candidates. Maximal degree in co-relation 221928. Up to 5224 conditions per place. [2023-08-30 15:09:20,200 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 454 selfloop transitions, 1415 changer transitions 85/1956 dead transitions. [2023-08-30 15:09:20,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1956 transitions, 30167 flow [2023-08-30 15:09:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 15:09:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 15:09:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5828 transitions. [2023-08-30 15:09:20,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44154860216683084 [2023-08-30 15:09:20,243 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5828 transitions. [2023-08-30 15:09:20,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5828 transitions. [2023-08-30 15:09:20,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:20,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5828 transitions. [2023-08-30 15:09:20,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 86.98507462686567) internal successors, (5828), 67 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:20,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:20,273 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:20,273 INFO L175 Difference]: Start difference. First operand has 172 places, 644 transitions, 11060 flow. Second operand 67 states and 5828 transitions. [2023-08-30 15:09:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1956 transitions, 30167 flow [2023-08-30 15:09:28,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1956 transitions, 29991 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-08-30 15:09:28,369 INFO L231 Difference]: Finished difference. Result has 241 places, 1501 transitions, 28392 flow [2023-08-30 15:09:28,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=10619, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=28392, PETRI_PLACES=241, PETRI_TRANSITIONS=1501} [2023-08-30 15:09:28,370 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 207 predicate places. [2023-08-30 15:09:28,370 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1501 transitions, 28392 flow [2023-08-30 15:09:28,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:28,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:28,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:28,375 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 15:09:28,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:28,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:09:28,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash -303418250, now seen corresponding path program 2 times [2023-08-30 15:09:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:28,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632076118] [2023-08-30 15:09:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:28,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632076118] [2023-08-30 15:09:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632076118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336210289] [2023-08-30 15:09:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:09:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:28,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:28,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:09:28,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:09:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:09:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:09:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:29,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336210289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:29,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:29,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 15:09:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764385407] [2023-08-30 15:09:29,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:29,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:09:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:09:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:09:29,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:09:29,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1501 transitions, 28392 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:29,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:29,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:09:29,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:53,362 INFO L130 PetriNetUnfolder]: 55441/81771 cut-off events. [2023-08-30 15:09:53,362 INFO L131 PetriNetUnfolder]: For 912050/912050 co-relation queries the response was YES. [2023-08-30 15:09:54,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467989 conditions, 81771 events. 55441/81771 cut-off events. For 912050/912050 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 616059 event pairs, 1395 based on Foata normal form. 786/82555 useless extension candidates. Maximal degree in co-relation 467926. Up to 11135 conditions per place. [2023-08-30 15:09:54,444 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 533 selfloop transitions, 3016 changer transitions 42/3593 dead transitions. [2023-08-30 15:09:54,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 3593 transitions, 68633 flow [2023-08-30 15:09:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 15:09:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 15:09:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5118 transitions. [2023-08-30 15:09:54,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44033382087240813 [2023-08-30 15:09:54,450 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5118 transitions. [2023-08-30 15:09:54,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5118 transitions. [2023-08-30 15:09:54,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:54,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5118 transitions. [2023-08-30 15:09:54,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 86.7457627118644) internal successors, (5118), 59 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:54,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:54,465 INFO L175 Difference]: Start difference. First operand has 241 places, 1501 transitions, 28392 flow. Second operand 59 states and 5118 transitions. [2023-08-30 15:09:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 3593 transitions, 68633 flow [2023-08-30 15:10:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 3593 transitions, 63586 flow, removed 2289 selfloop flow, removed 6 redundant places. [2023-08-30 15:10:35,433 INFO L231 Difference]: Finished difference. Result has 300 places, 3182 transitions, 62644 flow [2023-08-30 15:10:35,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=26151, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=62644, PETRI_PLACES=300, PETRI_TRANSITIONS=3182} [2023-08-30 15:10:35,435 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 266 predicate places. [2023-08-30 15:10:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 3182 transitions, 62644 flow [2023-08-30 15:10:35,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:35,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:10:35,435 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:10:35,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:10:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 15:10:35,640 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:10:35,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:10:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1929491086, now seen corresponding path program 2 times [2023-08-30 15:10:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:10:35,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595884157] [2023-08-30 15:10:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:10:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:10:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:10:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:10:35,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595884157] [2023-08-30 15:10:35,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595884157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:10:35,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970791849] [2023-08-30 15:10:35,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:10:35,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:10:35,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:10:35,874 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:10:35,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:10:35,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:10:35,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:10:35,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:10:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:10:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:10:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970791849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:10:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:10:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 15:10:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764221400] [2023-08-30 15:10:36,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:10:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:10:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:10:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:10:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:10:36,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:10:36,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 3182 transitions, 62644 flow. Second operand has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:36,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:10:36,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:10:36,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:11:15,113 INFO L130 PetriNetUnfolder]: 62629/92343 cut-off events. [2023-08-30 15:11:15,113 INFO L131 PetriNetUnfolder]: For 994460/994460 co-relation queries the response was YES. [2023-08-30 15:11:16,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530389 conditions, 92343 events. 62629/92343 cut-off events. For 994460/994460 co-relation queries the response was YES. Maximal size of possible extension queue 4250. Compared 706552 event pairs, 4387 based on Foata normal form. 1592/93933 useless extension candidates. Maximal degree in co-relation 530320. Up to 31082 conditions per place. [2023-08-30 15:11:16,647 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 455 selfloop transitions, 3382 changer transitions 38/3877 dead transitions. [2023-08-30 15:11:16,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 3877 transitions, 79990 flow [2023-08-30 15:11:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:11:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:11:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2435 transitions. [2023-08-30 15:11:16,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144307469180566 [2023-08-30 15:11:16,651 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2435 transitions. [2023-08-30 15:11:16,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2435 transitions. [2023-08-30 15:11:16,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:11:16,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2435 transitions. [2023-08-30 15:11:16,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.96428571428571) internal successors, (2435), 28 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:16,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:16,663 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:16,663 INFO L175 Difference]: Start difference. First operand has 300 places, 3182 transitions, 62644 flow. Second operand 28 states and 2435 transitions. [2023-08-30 15:11:16,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 3877 transitions, 79990 flow [2023-08-30 15:12:12,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 3877 transitions, 77220 flow, removed 1184 selfloop flow, removed 8 redundant places. [2023-08-30 15:12:12,857 INFO L231 Difference]: Finished difference. Result has 323 places, 3675 transitions, 78642 flow [2023-08-30 15:12:12,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=56989, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=78642, PETRI_PLACES=323, PETRI_TRANSITIONS=3675} [2023-08-30 15:12:12,860 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 289 predicate places. [2023-08-30 15:12:12,860 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 3675 transitions, 78642 flow [2023-08-30 15:12:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:12:12,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:12:12,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:12:12,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:12:13,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 15:12:13,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:12:13,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:12:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1929457606, now seen corresponding path program 3 times [2023-08-30 15:12:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:12:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340598436] [2023-08-30 15:12:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:12:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:12:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:12:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:12:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340598436] [2023-08-30 15:12:13,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340598436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:12:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280041123] [2023-08-30 15:12:13,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:12:13,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:12:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:12:13,273 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:12:13,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:12:13,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 15:12:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:12:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:12:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:12:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:12:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280041123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:12:13,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:12:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 15:12:13,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920536923] [2023-08-30 15:12:13,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:12:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:12:13,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:12:13,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:12:13,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-08-30 15:12:14,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:12:14,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 3675 transitions, 78642 flow. Second operand has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:12:14,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:12:14,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:12:14,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:13:16,703 INFO L130 PetriNetUnfolder]: 81507/119767 cut-off events. [2023-08-30 15:13:16,703 INFO L131 PetriNetUnfolder]: For 1408722/1408722 co-relation queries the response was YES. [2023-08-30 15:13:18,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734545 conditions, 119767 events. 81507/119767 cut-off events. For 1408722/1408722 co-relation queries the response was YES. Maximal size of possible extension queue 5536. Compared 939666 event pairs, 3963 based on Foata normal form. 1788/121553 useless extension candidates. Maximal degree in co-relation 734472. Up to 23612 conditions per place. [2023-08-30 15:13:18,655 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 778 selfloop transitions, 4241 changer transitions 44/5065 dead transitions. [2023-08-30 15:13:18,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 5065 transitions, 114571 flow [2023-08-30 15:13:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 15:13:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 15:13:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2694 transitions. [2023-08-30 15:13:18,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411331259210742 [2023-08-30 15:13:18,658 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2694 transitions. [2023-08-30 15:13:18,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2694 transitions. [2023-08-30 15:13:18,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:13:18,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2694 transitions. [2023-08-30 15:13:18,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 86.90322580645162) internal successors, (2694), 31 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:18,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:18,665 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:18,665 INFO L175 Difference]: Start difference. First operand has 323 places, 3675 transitions, 78642 flow. Second operand 31 states and 2694 transitions. [2023-08-30 15:13:18,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 5065 transitions, 114571 flow [2023-08-30 15:15:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 5065 transitions, 114008 flow, removed 248 selfloop flow, removed 9 redundant places. [2023-08-30 15:15:19,911 INFO L231 Difference]: Finished difference. Result has 358 places, 4844 transitions, 119868 flow [2023-08-30 15:15:19,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=76476, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=119868, PETRI_PLACES=358, PETRI_TRANSITIONS=4844} [2023-08-30 15:15:19,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-08-30 15:15:19,914 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 4844 transitions, 119868 flow [2023-08-30 15:15:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:15:19,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:15:19,915 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:15:19,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:15:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 15:15:20,119 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:15:20,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:15:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1034135572, now seen corresponding path program 1 times [2023-08-30 15:15:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:15:20,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010865974] [2023-08-30 15:15:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:15:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:15:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:15:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:15:20,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:15:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010865974] [2023-08-30 15:15:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010865974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:15:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831845923] [2023-08-30 15:15:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:15:20,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:15:20,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:15:20,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:15:20,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:15:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:15:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:15:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:15:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:15:20,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:15:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:15:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831845923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:15:21,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:15:21,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-30 15:15:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355849520] [2023-08-30 15:15:21,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:15:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:15:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:15:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:15:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-08-30 15:15:21,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:15:21,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 4844 transitions, 119868 flow. Second operand has 23 states, 23 states have (on average 77.56521739130434) internal successors, (1784), 23 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:15:21,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:15:21,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:15:21,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:17:08,721 INFO L130 PetriNetUnfolder]: 95533/140441 cut-off events. [2023-08-30 15:17:08,722 INFO L131 PetriNetUnfolder]: For 2121146/2121146 co-relation queries the response was YES. [2023-08-30 15:17:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963673 conditions, 140441 events. 95533/140441 cut-off events. For 2121146/2121146 co-relation queries the response was YES. Maximal size of possible extension queue 6516. Compared 1125764 event pairs, 8111 based on Foata normal form. 1270/141709 useless extension candidates. Maximal degree in co-relation 963586. Up to 57922 conditions per place. [2023-08-30 15:17:11,514 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 600 selfloop transitions, 5511 changer transitions 77/6190 dead transitions. [2023-08-30 15:17:11,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 6190 transitions, 155413 flow [2023-08-30 15:17:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 15:17:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 15:17:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5579 transitions. [2023-08-30 15:17:11,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43568918391253414 [2023-08-30 15:17:11,534 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5579 transitions. [2023-08-30 15:17:11,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5579 transitions. [2023-08-30 15:17:11,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:17:11,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5579 transitions. [2023-08-30 15:17:11,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 85.83076923076923) internal successors, (5579), 65 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:11,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:11,559 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:17:11,559 INFO L175 Difference]: Start difference. First operand has 358 places, 4844 transitions, 119868 flow. Second operand 65 states and 5579 transitions. [2023-08-30 15:17:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 6190 transitions, 155413 flow [2023-08-30 15:20:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 6190 transitions, 154998 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-30 15:20:54,106 INFO L231 Difference]: Finished difference. Result has 428 places, 5783 transitions, 155888 flow [2023-08-30 15:20:54,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=118565, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=155888, PETRI_PLACES=428, PETRI_TRANSITIONS=5783} [2023-08-30 15:20:54,110 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 394 predicate places. [2023-08-30 15:20:54,110 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 5783 transitions, 155888 flow [2023-08-30 15:20:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.56521739130434) internal successors, (1784), 23 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:54,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:20:54,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:20:54,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 15:20:54,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 15:20:54,314 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 15:20:54,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:20:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1571991217, now seen corresponding path program 2 times [2023-08-30 15:20:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:20:54,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944387630] [2023-08-30 15:20:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:20:54,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:20:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:20:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:20:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944387630] [2023-08-30 15:20:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944387630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:20:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559256213] [2023-08-30 15:20:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:20:54,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:20:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:20:54,513 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:20:54,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:20:54,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:20:54,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:20:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:20:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:20:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:20:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:20:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559256213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:20:55,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:20:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 15:20:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794208652] [2023-08-30 15:20:55,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:20:55,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:20:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:20:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:20:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-08-30 15:20:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 15:20:55,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 5783 transitions, 155888 flow. Second operand has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:20:55,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:20:55,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 15:20:55,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15