./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:49:38,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:49:38,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:49:39,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:49:39,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:49:39,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:49:39,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:49:39,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:49:39,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:49:39,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:49:39,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:49:39,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:49:39,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:49:39,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:49:39,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:49:39,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:49:39,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:49:39,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:49:39,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:49:39,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:49:39,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:49:39,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:49:39,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:49:39,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:49:39,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:49:39,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:49:39,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:49:39,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:49:39,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:49:39,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:49:39,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:49:39,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:49:39,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:49:39,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:49:39,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:49:39,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:49:39,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:49:39,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:49:39,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:49:39,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:49:39,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:49:39,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:49:39,085 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:49:39,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:49:39,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:49:39,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:49:39,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:49:39,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:49:39,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:49:39,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:49:39,089 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:49:39,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:49:39,090 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:49:39,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:49:39,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:49:39,091 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:49:39,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:49:39,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:49:39,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:49:39,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:49:39,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:49:39,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:49:39,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:49:39,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:49:39,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:49:39,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:49:39,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:49:39,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:49:39,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:49:39,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:49:39,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:49:39,095 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:49:39,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:49:39,095 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:49:39,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:49:39,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:49:39,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:49:39,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:49:39,413 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:49:39,413 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:49:39,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 11:49:40,536 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:49:40,758 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:49:40,759 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 11:49:40,767 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bc38d1bc/76cbaccaf1444afda591ebe1ecd06b89/FLAGc86bfe24b [2023-08-30 11:49:40,788 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bc38d1bc/76cbaccaf1444afda591ebe1ecd06b89 [2023-08-30 11:49:40,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:49:40,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:49:40,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:49:40,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:49:40,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:49:40,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:49:40" (1/1) ... [2023-08-30 11:49:40,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abe9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:40, skipping insertion in model container [2023-08-30 11:49:40,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:49:40" (1/1) ... [2023-08-30 11:49:40,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:49:40,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:49:40,976 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 11:49:40,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:49:40,987 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:49:41,017 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 11:49:41,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:49:41,024 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:49:41,025 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:49:41,030 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:49:41,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41 WrapperNode [2023-08-30 11:49:41,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:49:41,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:49:41,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:49:41,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:49:41,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,071 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-08-30 11:49:41,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:49:41,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:49:41,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:49:41,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:49:41,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:49:41,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:49:41,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:49:41,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:49:41,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (1/1) ... [2023-08-30 11:49:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:49:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:41,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:49:41,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:49:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:49:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:49:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:49:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:49:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:49:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:49:41,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:49:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:49:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:49:41,211 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:49:41,307 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:49:41,308 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:49:41,497 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:49:41,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:49:41,640 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 11:49:41,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:49:41 BoogieIcfgContainer [2023-08-30 11:49:41,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:49:41,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:49:41,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:49:41,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:49:41,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:49:40" (1/3) ... [2023-08-30 11:49:41,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea6d2d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:49:41, skipping insertion in model container [2023-08-30 11:49:41,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:49:41" (2/3) ... [2023-08-30 11:49:41,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea6d2d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:49:41, skipping insertion in model container [2023-08-30 11:49:41,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:49:41" (3/3) ... [2023-08-30 11:49:41,648 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 11:49:41,655 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:49:41,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:49:41,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 11:49:41,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:49:41,720 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:49:41,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 11:49:41,790 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2023-08-30 11:49:41,790 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:49:41,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 6/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 11:49:41,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 11:49:41,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 76 transitions, 164 flow [2023-08-30 11:49:41,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:49:41,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 76 transitions, 164 flow [2023-08-30 11:49:41,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 76 transitions, 164 flow [2023-08-30 11:49:41,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 164 flow [2023-08-30 11:49:41,836 INFO L130 PetriNetUnfolder]: 5/76 cut-off events. [2023-08-30 11:49:41,837 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:49:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 5/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 11:49:41,839 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2023-08-30 11:49:44,095 INFO L134 LiptonReduction]: Checked pairs total: 942 [2023-08-30 11:49:44,096 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-30 11:49:44,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:49:44,113 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;@85b006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:49:44,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 11:49:44,116 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 11:49:44,116 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:49:44,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:44,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:49:44,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:44,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash 11779495, now seen corresponding path program 1 times [2023-08-30 11:49:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128807944] [2023-08-30 11:49:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:44,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:44,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128807944] [2023-08-30 11:49:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128807944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:44,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:49:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849457005] [2023-08-30 11:49:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:44,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:44,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:44,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:44,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:44,478 INFO L130 PetriNetUnfolder]: 210/310 cut-off events. [2023-08-30 11:49:44,478 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 11:49:44,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 310 events. 210/310 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1147 event pairs, 94 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 552. Up to 304 conditions per place. [2023-08-30 11:49:44,484 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-30 11:49:44,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 96 flow [2023-08-30 11:49:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-30 11:49:44,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113871635610766 [2023-08-30 11:49:44,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-30 11:49:44,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-30 11:49:44,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:44,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-30 11:49:44,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,521 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 247 transitions. [2023-08-30 11:49:44,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 96 flow [2023-08-30 11:49:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:44,526 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 50 flow [2023-08-30 11:49:44,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-08-30 11:49:44,531 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-08-30 11:49:44,532 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 50 flow [2023-08-30 11:49:44,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:49:44,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:49:44,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:44,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash 11779541, now seen corresponding path program 1 times [2023-08-30 11:49:44,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841119118] [2023-08-30 11:49:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:44,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841119118] [2023-08-30 11:49:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841119118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:49:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95562390] [2023-08-30 11:49:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:44,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:44,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:44,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:44,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:44,763 INFO L130 PetriNetUnfolder]: 277/434 cut-off events. [2023-08-30 11:49:44,763 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:49:44,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 434 events. 277/434 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 1932 event pairs, 100 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 874. Up to 273 conditions per place. [2023-08-30 11:49:44,768 INFO L137 encePairwiseOnDemand]: 157/161 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-30 11:49:44,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 159 flow [2023-08-30 11:49:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-30 11:49:44,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2023-08-30 11:49:44,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:44,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:49:44,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,777 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 50 flow. Second operand 3 states and 261 transitions. [2023-08-30 11:49:44,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 159 flow [2023-08-30 11:49:44,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:44,779 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 63 flow [2023-08-30 11:49:44,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-30 11:49:44,780 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-30 11:49:44,780 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 63 flow [2023-08-30 11:49:44,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:44,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:49:44,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:49:44,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:44,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash 11779496, now seen corresponding path program 1 times [2023-08-30 11:49:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:44,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624722100] [2023-08-30 11:49:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:44,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624722100] [2023-08-30 11:49:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624722100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:44,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:44,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:49:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041339645] [2023-08-30 11:49:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:44,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:44,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:44,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:44,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:44,924 INFO L130 PetriNetUnfolder]: 189/301 cut-off events. [2023-08-30 11:49:44,925 INFO L131 PetriNetUnfolder]: For 17/22 co-relation queries the response was YES. [2023-08-30 11:49:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 301 events. 189/301 cut-off events. For 17/22 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1075 event pairs, 46 based on Foata normal form. 5/154 useless extension candidates. Maximal degree in co-relation 662. Up to 253 conditions per place. [2023-08-30 11:49:44,928 INFO L137 encePairwiseOnDemand]: 155/161 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 11:49:44,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 152 flow [2023-08-30 11:49:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-30 11:49:44,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2023-08-30 11:49:44,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:44,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-30 11:49:44,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:49:44,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,933 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 63 flow. Second operand 3 states and 261 transitions. [2023-08-30 11:49:44,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 152 flow [2023-08-30 11:49:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:44,935 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 75 flow [2023-08-30 11:49:44,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-30 11:49:44,936 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-30 11:49:44,939 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 75 flow [2023-08-30 11:49:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:44,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:49:44,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 11:49:44,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:44,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash 365166042, now seen corresponding path program 1 times [2023-08-30 11:49:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617692847] [2023-08-30 11:49:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:44,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617692847] [2023-08-30 11:49:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617692847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933768433] [2023-08-30 11:49:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:45,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:45,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:49:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933768433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:45,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:45,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:49:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739416503] [2023-08-30 11:49:45,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:45,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:49:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:49:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:49:45,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:45,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:45,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:45,428 INFO L130 PetriNetUnfolder]: 535/865 cut-off events. [2023-08-30 11:49:45,429 INFO L131 PetriNetUnfolder]: For 114/119 co-relation queries the response was YES. [2023-08-30 11:49:45,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 865 events. 535/865 cut-off events. For 114/119 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4047 event pairs, 35 based on Foata normal form. 59/596 useless extension candidates. Maximal degree in co-relation 2137. Up to 282 conditions per place. [2023-08-30 11:49:45,434 INFO L137 encePairwiseOnDemand]: 152/161 looper letters, 72 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2023-08-30 11:49:45,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 97 transitions, 469 flow [2023-08-30 11:49:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:49:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:49:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 630 transitions. [2023-08-30 11:49:45,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590062111801242 [2023-08-30 11:49:45,437 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 630 transitions. [2023-08-30 11:49:45,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 630 transitions. [2023-08-30 11:49:45,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:45,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 630 transitions. [2023-08-30 11:49:45,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,442 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,442 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 75 flow. Second operand 7 states and 630 transitions. [2023-08-30 11:49:45,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 97 transitions, 469 flow [2023-08-30 11:49:45,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 97 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:45,445 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 279 flow [2023-08-30 11:49:45,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-08-30 11:49:45,446 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-08-30 11:49:45,449 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 279 flow [2023-08-30 11:49:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:45,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:49:45,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:45,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:45,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:45,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 365166087, now seen corresponding path program 1 times [2023-08-30 11:49:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:45,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679200143] [2023-08-30 11:49:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:45,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679200143] [2023-08-30 11:49:45,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679200143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487700255] [2023-08-30 11:49:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:45,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:45,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:49:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:45,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487700255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:45,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:45,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:49:45,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089864703] [2023-08-30 11:49:45,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:45,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:49:45,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:49:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:49:45,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:45,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:45,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:45,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:45,885 INFO L130 PetriNetUnfolder]: 453/736 cut-off events. [2023-08-30 11:49:45,885 INFO L131 PetriNetUnfolder]: For 899/899 co-relation queries the response was YES. [2023-08-30 11:49:45,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 736 events. 453/736 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3245 event pairs, 61 based on Foata normal form. 0/606 useless extension candidates. Maximal degree in co-relation 2674. Up to 665 conditions per place. [2023-08-30 11:49:45,891 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 51 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-30 11:49:45,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 384 flow [2023-08-30 11:49:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2023-08-30 11:49:45,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2023-08-30 11:49:45,892 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 334 transitions. [2023-08-30 11:49:45,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 334 transitions. [2023-08-30 11:49:45,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:45,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 334 transitions. [2023-08-30 11:49:45,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,897 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 279 flow. Second operand 4 states and 334 transitions. [2023-08-30 11:49:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 384 flow [2023-08-30 11:49:45,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 356 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-08-30 11:49:45,905 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 210 flow [2023-08-30 11:49:45,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-30 11:49:45,908 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-08-30 11:49:45,910 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 210 flow [2023-08-30 11:49:45,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:45,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:49:45,922 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 11:49:46,121 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 11:49:46,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:46,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash 365166085, now seen corresponding path program 1 times [2023-08-30 11:49:46,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:46,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108875767] [2023-08-30 11:49:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:46,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:46,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108875767] [2023-08-30 11:49:46,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108875767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:46,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943033923] [2023-08-30 11:49:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:46,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:46,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:46,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:46,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:49:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943033923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:46,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:49:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755076349] [2023-08-30 11:49:46,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:49:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:49:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:49:46,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:46,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:46,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:46,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:46,462 INFO L130 PetriNetUnfolder]: 666/1172 cut-off events. [2023-08-30 11:49:46,462 INFO L131 PetriNetUnfolder]: For 1134/1134 co-relation queries the response was YES. [2023-08-30 11:49:46,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1172 events. 666/1172 cut-off events. For 1134/1134 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5985 event pairs, 221 based on Foata normal form. 0/995 useless extension candidates. Maximal degree in co-relation 3759. Up to 542 conditions per place. [2023-08-30 11:49:46,470 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 95 selfloop transitions, 14 changer transitions 0/110 dead transitions. [2023-08-30 11:49:46,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 110 transitions, 733 flow [2023-08-30 11:49:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:49:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:49:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 521 transitions. [2023-08-30 11:49:46,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393374741200828 [2023-08-30 11:49:46,472 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 521 transitions. [2023-08-30 11:49:46,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 521 transitions. [2023-08-30 11:49:46,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:46,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 521 transitions. [2023-08-30 11:49:46,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,476 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,476 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 210 flow. Second operand 6 states and 521 transitions. [2023-08-30 11:49:46,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 110 transitions, 733 flow [2023-08-30 11:49:46,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 110 transitions, 730 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:46,481 INFO L231 Difference]: Finished difference. Result has 46 places, 50 transitions, 366 flow [2023-08-30 11:49:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=46, PETRI_TRANSITIONS=50} [2023-08-30 11:49:46,482 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-08-30 11:49:46,482 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 50 transitions, 366 flow [2023-08-30 11:49:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:46,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:46,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:46,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:46,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:46,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1868180880, now seen corresponding path program 1 times [2023-08-30 11:49:46,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:46,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122681945] [2023-08-30 11:49:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122681945] [2023-08-30 11:49:46,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122681945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684651781] [2023-08-30 11:49:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:46,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:46,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:46,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:49:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:49:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684651781] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:46,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:49:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-08-30 11:49:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832523858] [2023-08-30 11:49:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:49:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:49:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:49:46,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:46,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:46,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:46,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:46,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:47,111 INFO L130 PetriNetUnfolder]: 464/875 cut-off events. [2023-08-30 11:49:47,113 INFO L131 PetriNetUnfolder]: For 1075/1087 co-relation queries the response was YES. [2023-08-30 11:49:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 875 events. 464/875 cut-off events. For 1075/1087 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4321 event pairs, 112 based on Foata normal form. 12/838 useless extension candidates. Maximal degree in co-relation 2800. Up to 777 conditions per place. [2023-08-30 11:49:47,118 INFO L137 encePairwiseOnDemand]: 157/161 looper letters, 57 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-30 11:49:47,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 547 flow [2023-08-30 11:49:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2023-08-30 11:49:47,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077639751552795 [2023-08-30 11:49:47,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2023-08-30 11:49:47,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2023-08-30 11:49:47,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:47,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2023-08-30 11:49:47,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,123 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,123 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 366 flow. Second operand 4 states and 327 transitions. [2023-08-30 11:49:47,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 547 flow [2023-08-30 11:49:47,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 538 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:47,128 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 373 flow [2023-08-30 11:49:47,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=373, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-30 11:49:47,129 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-08-30 11:49:47,129 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 373 flow [2023-08-30 11:49:47,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:47,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:47,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:47,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:47,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:47,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash -489069722, now seen corresponding path program 1 times [2023-08-30 11:49:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327837590] [2023-08-30 11:49:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:47,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327837590] [2023-08-30 11:49:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327837590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:47,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:49:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768839209] [2023-08-30 11:49:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:47,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:47,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:47,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:47,484 INFO L130 PetriNetUnfolder]: 570/1074 cut-off events. [2023-08-30 11:49:47,484 INFO L131 PetriNetUnfolder]: For 1666/1686 co-relation queries the response was YES. [2023-08-30 11:49:47,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3556 conditions, 1074 events. 570/1074 cut-off events. For 1666/1686 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5724 event pairs, 310 based on Foata normal form. 42/1056 useless extension candidates. Maximal degree in co-relation 3536. Up to 873 conditions per place. [2023-08-30 11:49:47,491 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 63 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-30 11:49:47,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 621 flow [2023-08-30 11:49:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-30 11:49:47,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-08-30 11:49:47,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-30 11:49:47,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-30 11:49:47,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:47,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-30 11:49:47,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,496 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 373 flow. Second operand 3 states and 258 transitions. [2023-08-30 11:49:47,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 621 flow [2023-08-30 11:49:47,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 619 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 11:49:47,502 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 416 flow [2023-08-30 11:49:47,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-30 11:49:47,504 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-30 11:49:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 416 flow [2023-08-30 11:49:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:47,505 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:49:47,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 11:49:47,505 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:47,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -488949165, now seen corresponding path program 2 times [2023-08-30 11:49:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:47,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147729737] [2023-08-30 11:49:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:47,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147729737] [2023-08-30 11:49:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147729737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392577242] [2023-08-30 11:49:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:47,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:49:47,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:49:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:49:47,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392577242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:49:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379699557] [2023-08-30 11:49:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:49:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:47,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:47,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:47,770 INFO L130 PetriNetUnfolder]: 469/904 cut-off events. [2023-08-30 11:49:47,770 INFO L131 PetriNetUnfolder]: For 1710/1768 co-relation queries the response was YES. [2023-08-30 11:49:47,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 904 events. 469/904 cut-off events. For 1710/1768 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4870 event pairs, 334 based on Foata normal form. 76/944 useless extension candidates. Maximal degree in co-relation 3120. Up to 897 conditions per place. [2023-08-30 11:49:47,778 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 11:49:47,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 445 flow [2023-08-30 11:49:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-30 11:49:47,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2023-08-30 11:49:47,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-30 11:49:47,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-30 11:49:47,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:47,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-30 11:49:47,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,782 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 416 flow. Second operand 3 states and 240 transitions. [2023-08-30 11:49:47,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 445 flow [2023-08-30 11:49:47,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 425 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:47,787 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 339 flow [2023-08-30 11:49:47,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-30 11:49:47,789 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-08-30 11:49:47,789 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 339 flow [2023-08-30 11:49:47,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:47,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:47,789 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:49:47,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 11:49:47,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:47,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:47,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash -488949208, now seen corresponding path program 2 times [2023-08-30 11:49:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220034861] [2023-08-30 11:49:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220034861] [2023-08-30 11:49:48,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220034861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932927829] [2023-08-30 11:49:48,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:48,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:48,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:48,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:49:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:49:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:48,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:48,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932927829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:48,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:48,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 11:49:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320855554] [2023-08-30 11:49:48,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:48,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:49:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:49:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:49:48,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:48,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:48,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:48,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:48,520 INFO L130 PetriNetUnfolder]: 1041/1997 cut-off events. [2023-08-30 11:49:48,520 INFO L131 PetriNetUnfolder]: For 7431/7557 co-relation queries the response was YES. [2023-08-30 11:49:48,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6450 conditions, 1997 events. 1041/1997 cut-off events. For 7431/7557 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12389 event pairs, 145 based on Foata normal form. 354/2267 useless extension candidates. Maximal degree in co-relation 6430. Up to 459 conditions per place. [2023-08-30 11:49:48,531 INFO L137 encePairwiseOnDemand]: 155/161 looper letters, 124 selfloop transitions, 71 changer transitions 0/198 dead transitions. [2023-08-30 11:49:48,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 198 transitions, 1385 flow [2023-08-30 11:49:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:49:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:49:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1067 transitions. [2023-08-30 11:49:48,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522774327122153 [2023-08-30 11:49:48,535 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1067 transitions. [2023-08-30 11:49:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1067 transitions. [2023-08-30 11:49:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:48,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1067 transitions. [2023-08-30 11:49:48,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 161.0) internal successors, (2093), 13 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,541 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 161.0) internal successors, (2093), 13 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,541 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 339 flow. Second operand 12 states and 1067 transitions. [2023-08-30 11:49:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 198 transitions, 1385 flow [2023-08-30 11:49:48,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 198 transitions, 1384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:48,551 INFO L231 Difference]: Finished difference. Result has 69 places, 98 transitions, 1096 flow [2023-08-30 11:49:48,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1096, PETRI_PLACES=69, PETRI_TRANSITIONS=98} [2023-08-30 11:49:48,552 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-08-30 11:49:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 98 transitions, 1096 flow [2023-08-30 11:49:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:48,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:48,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:48,758 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:48,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1906590139, now seen corresponding path program 1 times [2023-08-30 11:49:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:48,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712706331] [2023-08-30 11:49:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:48,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:48,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712706331] [2023-08-30 11:49:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712706331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:48,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634788825] [2023-08-30 11:49:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:48,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:48,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:48,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:49:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:48,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:48,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634788825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:48,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:49:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44334750] [2023-08-30 11:49:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:49:48,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-08-30 11:49:48,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 98 transitions, 1096 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:48,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-08-30 11:49:48,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:49,119 INFO L130 PetriNetUnfolder]: 820/1589 cut-off events. [2023-08-30 11:49:49,119 INFO L131 PetriNetUnfolder]: For 7347/7469 co-relation queries the response was YES. [2023-08-30 11:49:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5989 conditions, 1589 events. 820/1589 cut-off events. For 7347/7469 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9714 event pairs, 561 based on Foata normal form. 244/1783 useless extension candidates. Maximal degree in co-relation 5958. Up to 1582 conditions per place. [2023-08-30 11:49:49,129 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 11:49:49,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 996 flow [2023-08-30 11:49:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 11:49:49,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494824016563147 [2023-08-30 11:49:49,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 11:49:49,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 11:49:49,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:49,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 11:49:49,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,133 INFO L175 Difference]: Start difference. First operand has 69 places, 98 transitions, 1096 flow. Second operand 3 states and 239 transitions. [2023-08-30 11:49:49,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 996 flow [2023-08-30 11:49:49,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 902 flow, removed 42 selfloop flow, removed 3 redundant places. [2023-08-30 11:49:49,146 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 750 flow [2023-08-30 11:49:49,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=750, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2023-08-30 11:49:49,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-30 11:49:49,147 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 750 flow [2023-08-30 11:49:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:49,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:49,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:49,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:49,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:49,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash 672379774, now seen corresponding path program 1 times [2023-08-30 11:49:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091042322] [2023-08-30 11:49:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:49,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:49,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091042322] [2023-08-30 11:49:49,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091042322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:49,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:49,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:49:49,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896420903] [2023-08-30 11:49:49,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:49,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:49,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 161 [2023-08-30 11:49:49,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:49,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 161 [2023-08-30 11:49:49,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:49,674 INFO L130 PetriNetUnfolder]: 820/1543 cut-off events. [2023-08-30 11:49:49,674 INFO L131 PetriNetUnfolder]: For 4346/4408 co-relation queries the response was YES. [2023-08-30 11:49:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 conditions, 1543 events. 820/1543 cut-off events. For 4346/4408 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9105 event pairs, 561 based on Foata normal form. 62/1601 useless extension candidates. Maximal degree in co-relation 5422. Up to 1536 conditions per place. [2023-08-30 11:49:49,683 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 75 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-08-30 11:49:49,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 900 flow [2023-08-30 11:49:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-30 11:49:49,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474120082815735 [2023-08-30 11:49:49,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-30 11:49:49,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-30 11:49:49,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:49,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-30 11:49:49,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,687 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 750 flow. Second operand 3 states and 229 transitions. [2023-08-30 11:49:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 900 flow [2023-08-30 11:49:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:49,698 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 749 flow [2023-08-30 11:49:49,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=749, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-30 11:49:49,699 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-30 11:49:49,699 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 749 flow [2023-08-30 11:49:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:49,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 11:49:49,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:49,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 672379792, now seen corresponding path program 1 times [2023-08-30 11:49:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:49,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873349886] [2023-08-30 11:49:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873349886] [2023-08-30 11:49:49,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873349886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:49,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:49,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:49:49,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624266493] [2023-08-30 11:49:49,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:49,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:49,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:49,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 161 [2023-08-30 11:49:49,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 749 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:49,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 161 [2023-08-30 11:49:49,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:49,978 INFO L130 PetriNetUnfolder]: 820/1497 cut-off events. [2023-08-30 11:49:49,978 INFO L131 PetriNetUnfolder]: For 4346/4408 co-relation queries the response was YES. [2023-08-30 11:49:49,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5361 conditions, 1497 events. 820/1497 cut-off events. For 4346/4408 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8569 event pairs, 561 based on Foata normal form. 108/1601 useless extension candidates. Maximal degree in co-relation 5330. Up to 1490 conditions per place. [2023-08-30 11:49:49,988 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 73 selfloop transitions, 1 changer transitions 1/78 dead transitions. [2023-08-30 11:49:49,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 897 flow [2023-08-30 11:49:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 11:49:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2023-08-30 11:49:49,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 11:49:49,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 11:49:49,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:49,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 11:49:49,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:49,993 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 749 flow. Second operand 3 states and 225 transitions. [2023-08-30 11:49:49,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 897 flow [2023-08-30 11:49:50,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:50,004 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 745 flow [2023-08-30 11:49:50,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=745, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-08-30 11:49:50,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-30 11:49:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 745 flow [2023-08-30 11:49:50,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:50,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:50,005 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 11:49:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 11:49:50,006 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:50,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash -106021656, now seen corresponding path program 3 times [2023-08-30 11:49:50,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:50,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184676551] [2023-08-30 11:49:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:50,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184676551] [2023-08-30 11:49:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184676551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682570312] [2023-08-30 11:49:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:50,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:50,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:50,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:49:50,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:49:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:49:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682570312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:50,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-30 11:49:50,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182537105] [2023-08-30 11:49:50,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 11:49:50,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 11:49:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-30 11:49:50,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:50,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 745 flow. Second operand has 24 states, 24 states have (on average 76.08333333333333) internal successors, (1826), 24 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:50,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:50,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:50,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:51,141 INFO L130 PetriNetUnfolder]: 1812/3198 cut-off events. [2023-08-30 11:49:51,141 INFO L131 PetriNetUnfolder]: For 45026/45162 co-relation queries the response was YES. [2023-08-30 11:49:51,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10406 conditions, 3198 events. 1812/3198 cut-off events. For 45026/45162 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 17588 event pairs, 177 based on Foata normal form. 524/3720 useless extension candidates. Maximal degree in co-relation 10374. Up to 639 conditions per place. [2023-08-30 11:49:51,155 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 109 selfloop transitions, 159 changer transitions 66/337 dead transitions. [2023-08-30 11:49:51,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 337 transitions, 2572 flow [2023-08-30 11:49:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:49:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:49:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2055 transitions. [2023-08-30 11:49:51,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531832298136646 [2023-08-30 11:49:51,161 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2055 transitions. [2023-08-30 11:49:51,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2055 transitions. [2023-08-30 11:49:51,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:51,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2055 transitions. [2023-08-30 11:49:51,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.625) internal successors, (2055), 24 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:51,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:51,174 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:51,174 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 745 flow. Second operand 24 states and 2055 transitions. [2023-08-30 11:49:51,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 337 transitions, 2572 flow [2023-08-30 11:49:51,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 337 transitions, 2571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:51,192 INFO L231 Difference]: Finished difference. Result has 110 places, 183 transitions, 2267 flow [2023-08-30 11:49:51,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2267, PETRI_PLACES=110, PETRI_TRANSITIONS=183} [2023-08-30 11:49:51,194 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2023-08-30 11:49:51,194 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 183 transitions, 2267 flow [2023-08-30 11:49:51,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.08333333333333) internal successors, (1826), 24 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:51,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:51,195 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-30 11:49:51,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:51,401 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,SelfDestructingSolverStorable13 [2023-08-30 11:49:51,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:51,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 973673064, now seen corresponding path program 4 times [2023-08-30 11:49:51,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:51,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344011926] [2023-08-30 11:49:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:51,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344011926] [2023-08-30 11:49:51,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344011926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411743727] [2023-08-30 11:49:51,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:49:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:51,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:49:51,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:49:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:49:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:51,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:52,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411743727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:52,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:52,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-08-30 11:49:52,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720554030] [2023-08-30 11:49:52,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:52,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 11:49:52,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:52,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 11:49:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 11:49:52,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:52,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 183 transitions, 2267 flow. Second operand has 48 states, 48 states have (on average 76.04166666666667) internal successors, (3650), 48 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:52,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:52,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:52,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:54,974 INFO L130 PetriNetUnfolder]: 4964/8738 cut-off events. [2023-08-30 11:49:54,974 INFO L131 PetriNetUnfolder]: For 527112/527392 co-relation queries the response was YES. [2023-08-30 11:49:55,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32801 conditions, 8738 events. 4964/8738 cut-off events. For 527112/527392 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 51430 event pairs, 277 based on Foata normal form. 1076/9812 useless extension candidates. Maximal degree in co-relation 32746. Up to 2383 conditions per place. [2023-08-30 11:49:55,029 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 207 selfloop transitions, 515 changer transitions 138/863 dead transitions. [2023-08-30 11:49:55,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 863 transitions, 8560 flow [2023-08-30 11:49:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 11:49:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 11:49:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4119 transitions. [2023-08-30 11:49:55,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329968944099379 [2023-08-30 11:49:55,043 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4119 transitions. [2023-08-30 11:49:55,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4119 transitions. [2023-08-30 11:49:55,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:55,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4119 transitions. [2023-08-30 11:49:55,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 85.8125) internal successors, (4119), 48 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:55,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 161.0) internal successors, (7889), 49 states have internal predecessors, (7889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:55,071 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 161.0) internal successors, (7889), 49 states have internal predecessors, (7889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:55,071 INFO L175 Difference]: Start difference. First operand has 110 places, 183 transitions, 2267 flow. Second operand 48 states and 4119 transitions. [2023-08-30 11:49:55,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 863 transitions, 8560 flow [2023-08-30 11:49:55,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 863 transitions, 7062 flow, removed 711 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:55,200 INFO L231 Difference]: Finished difference. Result has 199 places, 541 transitions, 6818 flow [2023-08-30 11:49:55,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6818, PETRI_PLACES=199, PETRI_TRANSITIONS=541} [2023-08-30 11:49:55,201 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-08-30 11:49:55,201 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 541 transitions, 6818 flow [2023-08-30 11:49:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 76.04166666666667) internal successors, (3650), 48 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:55,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:55,203 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-08-30 11:49:55,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 11:49:55,409 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:49:55,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1545470616, now seen corresponding path program 5 times [2023-08-30 11:49:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:55,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710160445] [2023-08-30 11:49:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:56,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710160445] [2023-08-30 11:49:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710160445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990134981] [2023-08-30 11:49:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:49:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:56,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:56,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:49:56,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:49:57,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-30 11:49:57,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:49:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990134981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:59,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:59,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2023-08-30 11:49:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958961562] [2023-08-30 11:49:59,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:59,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-08-30 11:49:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-08-30 11:49:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-08-30 11:49:59,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:49:59,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 541 transitions, 6818 flow. Second operand has 96 states, 96 states have (on average 76.02083333333333) internal successors, (7298), 96 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:59,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:59,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:49:59,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:09,224 INFO L130 PetriNetUnfolder]: 15892/27910 cut-off events. [2023-08-30 11:50:09,224 INFO L131 PetriNetUnfolder]: For 4717006/4717574 co-relation queries the response was YES. [2023-08-30 11:50:09,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105065 conditions, 27910 events. 15892/27910 cut-off events. For 4717006/4717574 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 181870 event pairs, 473 based on Foata normal form. 2180/30088 useless extension candidates. Maximal degree in co-relation 104966. Up to 7639 conditions per place. [2023-08-30 11:50:09,460 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 401 selfloop transitions, 1807 changer transitions 282/2493 dead transitions. [2023-08-30 11:50:09,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 2493 transitions, 27327 flow [2023-08-30 11:50:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 11:50:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 11:50:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8247 transitions. [2023-08-30 11:50:09,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335791925465838 [2023-08-30 11:50:09,472 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8247 transitions. [2023-08-30 11:50:09,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8247 transitions. [2023-08-30 11:50:09,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:09,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8247 transitions. [2023-08-30 11:50:09,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 85.90625) internal successors, (8247), 96 states have internal predecessors, (8247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:09,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 161.0) internal successors, (15617), 97 states have internal predecessors, (15617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:09,675 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 161.0) internal successors, (15617), 97 states have internal predecessors, (15617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:09,675 INFO L175 Difference]: Start difference. First operand has 199 places, 541 transitions, 6818 flow. Second operand 96 states and 8247 transitions. [2023-08-30 11:50:09,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 2493 transitions, 27327 flow [2023-08-30 11:50:10,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 2493 transitions, 21912 flow, removed 2583 selfloop flow, removed 10 redundant places. [2023-08-30 11:50:10,463 INFO L231 Difference]: Finished difference. Result has 378 places, 1835 transitions, 22952 flow [2023-08-30 11:50:10,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=22952, PETRI_PLACES=378, PETRI_TRANSITIONS=1835} [2023-08-30 11:50:10,464 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2023-08-30 11:50:10,464 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1835 transitions, 22952 flow [2023-08-30 11:50:10,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 76.02083333333333) internal successors, (7298), 96 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:10,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:10,466 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-08-30 11:50:10,474 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 11:50:10,671 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,SelfDestructingSolverStorable15 [2023-08-30 11:50:10,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:50:10,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 111203176, now seen corresponding path program 6 times [2023-08-30 11:50:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503252114] [2023-08-30 11:50:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:15,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503252114] [2023-08-30 11:50:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503252114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334133221] [2023-08-30 11:50:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:50:15,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:15,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:15,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:50:15,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-08-30 11:50:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 11:50:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:15,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334133221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:24,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2023-08-30 11:50:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012799323] [2023-08-30 11:50:24,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-08-30 11:50:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-08-30 11:50:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2023-08-30 11:50:24,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:50:24,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1835 transitions, 22952 flow. Second operand has 192 states, 192 states have (on average 76.01041666666667) internal successors, (14594), 192 states have internal predecessors, (14594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:24,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:24,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:50:24,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:43,302 INFO L130 PetriNetUnfolder]: 56196/98538 cut-off events. [2023-08-30 11:51:43,302 INFO L131 PetriNetUnfolder]: For 39992340/39993484 co-relation queries the response was YES. [2023-08-30 11:51:45,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370585 conditions, 98538 events. 56196/98538 cut-off events. For 39992340/39993484 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 717301 event pairs, 861 based on Foata normal form. 4388/102924 useless extension candidates. Maximal degree in co-relation 370400. Up to 26791 conditions per place. [2023-08-30 11:51:46,160 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 787 selfloop transitions, 6699 changer transitions 570/8059 dead transitions. [2023-08-30 11:51:46,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 8059 transitions, 95513 flow [2023-08-30 11:51:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-08-30 11:51:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-08-30 11:51:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 16503 transitions. [2023-08-30 11:51:46,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338703416149069 [2023-08-30 11:51:46,187 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 16503 transitions. [2023-08-30 11:51:46,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 16503 transitions. [2023-08-30 11:51:46,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:46,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 16503 transitions. [2023-08-30 11:51:46,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 85.953125) internal successors, (16503), 192 states have internal predecessors, (16503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:46,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 161.0) internal successors, (31073), 193 states have internal predecessors, (31073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:46,267 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 161.0) internal successors, (31073), 193 states have internal predecessors, (31073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:46,267 INFO L175 Difference]: Start difference. First operand has 378 places, 1835 transitions, 22952 flow. Second operand 192 states and 16503 transitions. [2023-08-30 11:51:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 8059 transitions, 95513 flow [2023-08-30 11:51:54,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 8059 transitions, 75058 flow, removed 9783 selfloop flow, removed 22 redundant places. [2023-08-30 11:51:54,223 INFO L231 Difference]: Finished difference. Result has 737 places, 6729 transitions, 83286 flow [2023-08-30 11:51:54,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=21121, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=83286, PETRI_PLACES=737, PETRI_TRANSITIONS=6729} [2023-08-30 11:51:54,225 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 708 predicate places. [2023-08-30 11:51:54,225 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 6729 transitions, 83286 flow [2023-08-30 11:51:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 76.01041666666667) internal successors, (14594), 192 states have internal predecessors, (14594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:54,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:54,228 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-08-30 11:51:54,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:54,435 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,SelfDestructingSolverStorable16 [2023-08-30 11:51:54,435 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:51:54,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -598573208, now seen corresponding path program 7 times [2023-08-30 11:51:54,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:54,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495255957] [2023-08-30 11:51:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:10,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:10,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495255957] [2023-08-30 11:52:10,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495255957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:10,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696557088] [2023-08-30 11:52:10,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:52:10,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:10,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:10,977 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:10,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:52:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2023-08-30 11:52:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:11,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:44,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696557088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:44,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:44,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2023-08-30 11:52:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234967556] [2023-08-30 11:52:44,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-08-30 11:52:44,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-08-30 11:52:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2023-08-30 11:52:46,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-08-30 11:52:46,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 6729 transitions, 83286 flow. Second operand has 384 states, 384 states have (on average 76.00520833333333) internal successors, (29186), 384 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:46,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:46,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-08-30 11:52:46,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand