./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-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-figure1-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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --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 11:32:38,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:32:38,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:32:38,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:32:38,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:32:38,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:32:38,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:32:38,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:32:38,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:32:38,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:32:38,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:32:38,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:32:38,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:32:38,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:32:38,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:32:38,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:32:38,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:32:38,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:32:38,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:32:38,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:32:38,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:32:38,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:32:38,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:32:38,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:32:38,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:32:38,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:32:38,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:32:38,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:32:38,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:32:38,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:32:38,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:32:38,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:32:38,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:32:38,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:32:38,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:32:38,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:32:38,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:32:38,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:32:38,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:32:38,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:32:38,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:32:38,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:32:38,385 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:32:38,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:32:38,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:32:38,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:32:38,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:32:38,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:32:38,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:32:38,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:32:38,388 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:32:38,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:32:38,388 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:32:38,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:32:38,389 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:32:38,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:32:38,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:32:38,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:32:38,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:32:38,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:32:38,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:32:38,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:32:38,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:32:38,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:32:38,392 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:32:38,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:32:38,392 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:32:38,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:32:38,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:32:38,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:32:38,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:32:38,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:32:38,695 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:32:38,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 11:32:39,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:32:39,846 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:32:39,847 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 11:32:39,851 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac43bc92/c27bf8bb7b3343da8995299c9db99fcd/FLAG29896183f [2023-08-30 11:32:39,862 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac43bc92/c27bf8bb7b3343da8995299c9db99fcd [2023-08-30 11:32:39,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:32:39,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:32:39,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:32:39,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:32:39,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:32:39,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:32:39" (1/1) ... [2023-08-30 11:32:39,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2897d38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:39, skipping insertion in model container [2023-08-30 11:32:39,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:32:39" (1/1) ... [2023-08-30 11:32:39,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:32:39,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:32:40,011 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-figure1-alt.wvr.c[2087,2100] [2023-08-30 11:32:40,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:32:40,020 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:32:40,043 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-figure1-alt.wvr.c[2087,2100] [2023-08-30 11:32:40,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:32:40,049 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:32:40,049 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:32:40,053 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:32:40,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40 WrapperNode [2023-08-30 11:32:40,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:32:40,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:32:40,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:32:40,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:32:40,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,089 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-08-30 11:32:40,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:32:40,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:32:40,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:32:40,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:32:40,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,125 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:32:40,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:32:40,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:32:40,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:32:40,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (1/1) ... [2023-08-30 11:32:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:32:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:40,164 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 11:32:40,171 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 11:32:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:32:40,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:32:40,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:32:40,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:32:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:32:40,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:32:40,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:32:40,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:32:40,194 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 11:32:40,252 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:32:40,253 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:32:40,468 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:32:40,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:32:40,544 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 11:32:40,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:32:40 BoogieIcfgContainer [2023-08-30 11:32:40,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:32:40,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:32:40,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:32:40,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:32:40,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:32:39" (1/3) ... [2023-08-30 11:32:40,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599d9ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:32:40, skipping insertion in model container [2023-08-30 11:32:40,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:32:40" (2/3) ... [2023-08-30 11:32:40,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599d9ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:32:40, skipping insertion in model container [2023-08-30 11:32:40,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:32:40" (3/3) ... [2023-08-30 11:32:40,551 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-30 11:32:40,556 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:32:40,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:32:40,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 11:32:40,562 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:32:40,634 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:32:40,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 212 flow [2023-08-30 11:32:40,693 INFO L130 PetriNetUnfolder]: 6/96 cut-off events. [2023-08-30 11:32:40,693 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:32:40,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 11:32:40,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 212 flow [2023-08-30 11:32:40,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 81 transitions, 174 flow [2023-08-30 11:32:40,706 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:32:40,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 81 transitions, 174 flow [2023-08-30 11:32:40,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 81 transitions, 174 flow [2023-08-30 11:32:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 81 transitions, 174 flow [2023-08-30 11:32:40,751 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-08-30 11:32:40,751 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:32:40,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 5/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 11:32:40,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-30 11:32:42,787 INFO L134 LiptonReduction]: Checked pairs total: 1236 [2023-08-30 11:32:42,787 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-30 11:32:42,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:32:42,800 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;@4251d36a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:32:42,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 11:32:42,803 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 11:32:42,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:32:42,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:42,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:42,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:42,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 12203368, now seen corresponding path program 1 times [2023-08-30 11:32:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039733827] [2023-08-30 11:32:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:42,930 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 11:32:42,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:42,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039733827] [2023-08-30 11:32:42,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039733827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:42,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857328423] [2023-08-30 11:32:42,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:42,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:42,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:42,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:42,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:43,042 INFO L130 PetriNetUnfolder]: 215/337 cut-off events. [2023-08-30 11:32:43,042 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 11:32:43,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 337 events. 215/337 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 1250 event pairs, 41 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 595. Up to 306 conditions per place. [2023-08-30 11:32:43,048 INFO L137 encePairwiseOnDemand]: 162/173 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-30 11:32:43,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 161 flow [2023-08-30 11:32:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-30 11:32:43,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549132947976878 [2023-08-30 11:32:43,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-30 11:32:43,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-30 11:32:43,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:43,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-30 11:32:43,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,075 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 288 transitions. [2023-08-30 11:32:43,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 161 flow [2023-08-30 11:32:43,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:32:43,078 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 86 flow [2023-08-30 11:32:43,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 11:32:43,082 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-30 11:32:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 86 flow [2023-08-30 11:32:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:43,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:43,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:32:43,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:43,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash 12203416, now seen corresponding path program 1 times [2023-08-30 11:32:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974749358] [2023-08-30 11:32:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:43,151 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 11:32:43,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:43,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974749358] [2023-08-30 11:32:43,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974749358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:43,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:43,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095588874] [2023-08-30 11:32:43,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:43,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:43,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:43,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:43,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:43,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 86 flow. Second operand has 3 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 11:32:43,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:43,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:43,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:43,216 INFO L130 PetriNetUnfolder]: 198/324 cut-off events. [2023-08-30 11:32:43,217 INFO L131 PetriNetUnfolder]: For 25/53 co-relation queries the response was YES. [2023-08-30 11:32:43,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 324 events. 198/324 cut-off events. For 25/53 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1347 event pairs, 105 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 730. Up to 290 conditions per place. [2023-08-30 11:32:43,218 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 11:32:43,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 165 flow [2023-08-30 11:32:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-30 11:32:43,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-08-30 11:32:43,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-30 11:32:43,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-30 11:32:43,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:43,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-30 11:32:43,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,223 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 86 flow. Second operand 3 states and 278 transitions. [2023-08-30 11:32:43,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 165 flow [2023-08-30 11:32:43,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:43,224 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 78 flow [2023-08-30 11:32:43,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-30 11:32:43,224 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-30 11:32:43,225 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 78 flow [2023-08-30 11:32:43,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 11:32:43,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:43,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:43,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:32:43,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:43,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash 378306317, now seen corresponding path program 1 times [2023-08-30 11:32:43,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:43,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428554533] [2023-08-30 11:32:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:43,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:43,266 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 11:32:43,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428554533] [2023-08-30 11:32:43,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428554533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553750343] [2023-08-30 11:32:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:43,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:43,282 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 11:32:43,317 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 11:32:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:43,362 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 11:32:43,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:43,374 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 11:32:43,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553750343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:43,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:43,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:32:43,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633919525] [2023-08-30 11:32:43,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:43,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:43,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:43,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:43,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:43,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:43,632 INFO L130 PetriNetUnfolder]: 636/975 cut-off events. [2023-08-30 11:32:43,632 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 11:32:43,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 975 events. 636/975 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4702 event pairs, 80 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 922. Up to 588 conditions per place. [2023-08-30 11:32:43,639 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 86 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-08-30 11:32:43,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 96 transitions, 481 flow [2023-08-30 11:32:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:32:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:32:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 665 transitions. [2023-08-30 11:32:43,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491329479768786 [2023-08-30 11:32:43,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 665 transitions. [2023-08-30 11:32:43,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 665 transitions. [2023-08-30 11:32:43,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:43,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 665 transitions. [2023-08-30 11:32:43,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,647 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,647 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 78 flow. Second operand 7 states and 665 transitions. [2023-08-30 11:32:43,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 96 transitions, 481 flow [2023-08-30 11:32:43,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 96 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:32:43,650 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 133 flow [2023-08-30 11:32:43,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 11:32:43,651 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-30 11:32:43,652 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 133 flow [2023-08-30 11:32:43,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:43,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 11:32:43,673 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 11:32:43,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:43,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:43,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1157405639, now seen corresponding path program 1 times [2023-08-30 11:32:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394882448] [2023-08-30 11:32:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394882448] [2023-08-30 11:32:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394882448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318198247] [2023-08-30 11:32:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:43,908 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 11:32:43,910 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 11:32:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:32:43,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:43,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:32:43,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318198247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:43,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:32:43,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-30 11:32:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115452630] [2023-08-30 11:32:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:32:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:32:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:32:43,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:43,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:43,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:43,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:43,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:44,101 INFO L130 PetriNetUnfolder]: 577/902 cut-off events. [2023-08-30 11:32:44,102 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-30 11:32:44,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 902 events. 577/902 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4444 event pairs, 33 based on Foata normal form. 28/616 useless extension candidates. Maximal degree in co-relation 1173. Up to 665 conditions per place. [2023-08-30 11:32:44,106 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 52 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-30 11:32:44,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 295 flow [2023-08-30 11:32:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:32:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:32:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-08-30 11:32:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317919075144508 [2023-08-30 11:32:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-08-30 11:32:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-08-30 11:32:44,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:44,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-08-30 11:32:44,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,111 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 133 flow. Second operand 5 states and 460 transitions. [2023-08-30 11:32:44,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 295 flow [2023-08-30 11:32:44,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:44,116 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 110 flow [2023-08-30 11:32:44,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 11:32:44,117 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-30 11:32:44,117 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 110 flow [2023-08-30 11:32:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:44,125 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 11:32:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 11:32:44,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:44,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 378306269, now seen corresponding path program 1 times [2023-08-30 11:32:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:44,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011840270] [2023-08-30 11:32:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:44,377 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 11:32:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011840270] [2023-08-30 11:32:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011840270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:44,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:44,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049571894] [2023-08-30 11:32:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:44,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:44,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:44,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:44,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:44,432 INFO L130 PetriNetUnfolder]: 446/711 cut-off events. [2023-08-30 11:32:44,433 INFO L131 PetriNetUnfolder]: For 244/252 co-relation queries the response was YES. [2023-08-30 11:32:44,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 711 events. 446/711 cut-off events. For 244/252 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3577 event pairs, 270 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 933. Up to 706 conditions per place. [2023-08-30 11:32:44,436 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 11:32:44,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 152 flow [2023-08-30 11:32:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-30 11:32:44,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51252408477842 [2023-08-30 11:32:44,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-30 11:32:44,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-30 11:32:44,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:44,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-30 11:32:44,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,450 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 110 flow. Second operand 3 states and 266 transitions. [2023-08-30 11:32:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 152 flow [2023-08-30 11:32:44,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:32:44,452 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 103 flow [2023-08-30 11:32:44,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-30 11:32:44,452 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-30 11:32:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 103 flow [2023-08-30 11:32:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:44,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:44,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:32:44,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:44,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 378306270, now seen corresponding path program 1 times [2023-08-30 11:32:44,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:44,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409274863] [2023-08-30 11:32:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:44,500 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 11:32:44,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:44,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409274863] [2023-08-30 11:32:44,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409274863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878808555] [2023-08-30 11:32:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:44,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:44,518 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 11:32:44,519 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 11:32:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:44,563 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 11:32:44,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:44,578 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 11:32:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878808555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:44,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:44,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:32:44,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784619477] [2023-08-30 11:32:44,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:44,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:44,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:44,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:44,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:44,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:44,723 INFO L130 PetriNetUnfolder]: 593/1082 cut-off events. [2023-08-30 11:32:44,724 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-30 11:32:44,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 1082 events. 593/1082 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5921 event pairs, 89 based on Foata normal form. 136/995 useless extension candidates. Maximal degree in co-relation 3019. Up to 487 conditions per place. [2023-08-30 11:32:44,728 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 61 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-30 11:32:44,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 88 transitions, 513 flow [2023-08-30 11:32:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:32:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:32:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 579 transitions. [2023-08-30 11:32:44,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578034682080925 [2023-08-30 11:32:44,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 579 transitions. [2023-08-30 11:32:44,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 579 transitions. [2023-08-30 11:32:44,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:44,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 579 transitions. [2023-08-30 11:32:44,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.5) internal successors, (579), 6 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,733 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 103 flow. Second operand 6 states and 579 transitions. [2023-08-30 11:32:44,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 88 transitions, 513 flow [2023-08-30 11:32:44,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:44,735 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 370 flow [2023-08-30 11:32:44,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-30 11:32:44,736 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 11:32:44,736 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 370 flow [2023-08-30 11:32:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:44,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:44,752 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 11:32:44,941 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 11:32:44,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:44,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1225627852, now seen corresponding path program 1 times [2023-08-30 11:32:44,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:44,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259401104] [2023-08-30 11:32:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:44,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:44,998 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 11:32:44,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259401104] [2023-08-30 11:32:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259401104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:44,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:44,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407915071] [2023-08-30 11:32:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:45,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:45,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:45,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:45,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:45,119 INFO L130 PetriNetUnfolder]: 587/1125 cut-off events. [2023-08-30 11:32:45,119 INFO L131 PetriNetUnfolder]: For 1697/1697 co-relation queries the response was YES. [2023-08-30 11:32:45,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 1125 events. 587/1125 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6207 event pairs, 343 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 4151. Up to 926 conditions per place. [2023-08-30 11:32:45,126 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-30 11:32:45,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 629 flow [2023-08-30 11:32:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-30 11:32:45,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-08-30 11:32:45,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-30 11:32:45,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-30 11:32:45,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:45,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-30 11:32:45,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,130 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 370 flow. Second operand 3 states and 278 transitions. [2023-08-30 11:32:45,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 629 flow [2023-08-30 11:32:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 571 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-08-30 11:32:45,136 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 380 flow [2023-08-30 11:32:45,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-08-30 11:32:45,137 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 11:32:45,138 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 380 flow [2023-08-30 11:32:45,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:45,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:32:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 11:32:45,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:45,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash 129723049, now seen corresponding path program 2 times [2023-08-30 11:32:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733725184] [2023-08-30 11:32:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:45,189 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 11:32:45,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733725184] [2023-08-30 11:32:45,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733725184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655510534] [2023-08-30 11:32:45,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:45,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:45,198 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 11:32:45,199 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 11:32:45,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:32:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:45,249 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 11:32:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:45,284 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 11:32:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655510534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:45,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 11:32:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106290574] [2023-08-30 11:32:45,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:32:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:32:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:32:45,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:45,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 380 flow. Second operand has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:45,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:45,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:45,612 INFO L130 PetriNetUnfolder]: 1355/2567 cut-off events. [2023-08-30 11:32:45,612 INFO L131 PetriNetUnfolder]: For 6674/6748 co-relation queries the response was YES. [2023-08-30 11:32:45,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9542 conditions, 2567 events. 1355/2567 cut-off events. For 6674/6748 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16916 event pairs, 169 based on Foata normal form. 344/2387 useless extension candidates. Maximal degree in co-relation 9524. Up to 845 conditions per place. [2023-08-30 11:32:45,623 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 123 selfloop transitions, 97 changer transitions 0/222 dead transitions. [2023-08-30 11:32:45,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 222 transitions, 1767 flow [2023-08-30 11:32:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:32:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:32:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1173 transitions. [2023-08-30 11:32:45,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565028901734104 [2023-08-30 11:32:45,626 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1173 transitions. [2023-08-30 11:32:45,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1173 transitions. [2023-08-30 11:32:45,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:45,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1173 transitions. [2023-08-30 11:32:45,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 97.75) internal successors, (1173), 12 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,631 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,631 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 380 flow. Second operand 12 states and 1173 transitions. [2023-08-30 11:32:45,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 222 transitions, 1767 flow [2023-08-30 11:32:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 222 transitions, 1754 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:45,637 INFO L231 Difference]: Finished difference. Result has 65 places, 122 transitions, 1529 flow [2023-08-30 11:32:45,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1529, PETRI_PLACES=65, PETRI_TRANSITIONS=122} [2023-08-30 11:32:45,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-08-30 11:32:45,638 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 122 transitions, 1529 flow [2023-08-30 11:32:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:45,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:45,638 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:32:45,647 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 11:32:45,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:45,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:45,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:45,843 INFO L85 PathProgramCache]: Analyzing trace with hash 129723096, now seen corresponding path program 2 times [2023-08-30 11:32:45,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:45,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114498422] [2023-08-30 11:32:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:45,887 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 11:32:45,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:45,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114498422] [2023-08-30 11:32:45,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114498422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:45,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288161844] [2023-08-30 11:32:45,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:45,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:45,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:45,889 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 11:32:45,891 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 11:32:45,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:32:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:45,936 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 11:32:45,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:32:45,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288161844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:45,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:32:45,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:32:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442050982] [2023-08-30 11:32:45,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:32:45,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:45,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 122 transitions, 1529 flow. Second operand has 3 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 11:32:45,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:45,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:45,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:46,144 INFO L130 PetriNetUnfolder]: 1085/2106 cut-off events. [2023-08-30 11:32:46,145 INFO L131 PetriNetUnfolder]: For 7650/7709 co-relation queries the response was YES. [2023-08-30 11:32:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2106 events. 1085/2106 cut-off events. For 7650/7709 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13832 event pairs, 731 based on Foata normal form. 123/1899 useless extension candidates. Maximal degree in co-relation 9284. Up to 2102 conditions per place. [2023-08-30 11:32:46,158 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 100 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 11:32:46,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 1509 flow [2023-08-30 11:32:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-30 11:32:46,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048169556840078 [2023-08-30 11:32:46,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-30 11:32:46,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-30 11:32:46,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:46,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-30 11:32:46,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,163 INFO L175 Difference]: Start difference. First operand has 65 places, 122 transitions, 1529 flow. Second operand 3 states and 262 transitions. [2023-08-30 11:32:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 1509 flow [2023-08-30 11:32:46,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 1196 flow, removed 145 selfloop flow, removed 3 redundant places. [2023-08-30 11:32:46,185 INFO L231 Difference]: Finished difference. Result has 63 places, 103 transitions, 996 flow [2023-08-30 11:32:46,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=996, PETRI_PLACES=63, PETRI_TRANSITIONS=103} [2023-08-30 11:32:46,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-08-30 11:32:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 103 transitions, 996 flow [2023-08-30 11:32:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 11:32:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:46,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:46,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 11:32:46,391 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 11:32:46,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:46,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569159, now seen corresponding path program 1 times [2023-08-30 11:32:46,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707138926] [2023-08-30 11:32:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:46,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:46,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707138926] [2023-08-30 11:32:46,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707138926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:46,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039871404] [2023-08-30 11:32:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:46,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:46,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:46,450 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 11:32:46,451 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 11:32:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:46,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:32:46,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039871404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:46,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:46,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:32:46,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51588906] [2023-08-30 11:32:46,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:46,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:46,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:46,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:46,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:46,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 103 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:46,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:46,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:46,920 INFO L130 PetriNetUnfolder]: 1991/3626 cut-off events. [2023-08-30 11:32:46,920 INFO L131 PetriNetUnfolder]: For 9208/9208 co-relation queries the response was YES. [2023-08-30 11:32:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13802 conditions, 3626 events. 1991/3626 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22957 event pairs, 486 based on Foata normal form. 0/3079 useless extension candidates. Maximal degree in co-relation 13774. Up to 1137 conditions per place. [2023-08-30 11:32:46,938 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 196 selfloop transitions, 107 changer transitions 0/304 dead transitions. [2023-08-30 11:32:46,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 304 transitions, 3425 flow [2023-08-30 11:32:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:32:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:32:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 646 transitions. [2023-08-30 11:32:46,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334434351775392 [2023-08-30 11:32:46,941 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 646 transitions. [2023-08-30 11:32:46,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 646 transitions. [2023-08-30 11:32:46,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:46,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 646 transitions. [2023-08-30 11:32:46,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,944 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,944 INFO L175 Difference]: Start difference. First operand has 63 places, 103 transitions, 996 flow. Second operand 7 states and 646 transitions. [2023-08-30 11:32:46,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 304 transitions, 3425 flow [2023-08-30 11:32:46,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 304 transitions, 3404 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:46,987 INFO L231 Difference]: Finished difference. Result has 71 places, 185 transitions, 2244 flow [2023-08-30 11:32:46,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=71, PETRI_TRANSITIONS=185} [2023-08-30 11:32:46,987 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-08-30 11:32:46,987 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 185 transitions, 2244 flow [2023-08-30 11:32:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:46,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:46,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:47,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:32:47,192 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 11:32:47,193 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:47,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash 74678889, now seen corresponding path program 1 times [2023-08-30 11:32:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658881561] [2023-08-30 11:32:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:47,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:32:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658881561] [2023-08-30 11:32:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658881561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702735632] [2023-08-30 11:32:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:47,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:47,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 185 transitions, 2244 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:47,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:47,559 INFO L130 PetriNetUnfolder]: 1570/3047 cut-off events. [2023-08-30 11:32:47,559 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2023-08-30 11:32:47,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 3047 events. 1570/3047 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19970 event pairs, 428 based on Foata normal form. 172/3138 useless extension candidates. Maximal degree in co-relation 11910. Up to 2861 conditions per place. [2023-08-30 11:32:47,575 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 144 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2023-08-30 11:32:47,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 146 transitions, 1966 flow [2023-08-30 11:32:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-30 11:32:47,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163776493256262 [2023-08-30 11:32:47,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-30 11:32:47,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-30 11:32:47,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:47,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-30 11:32:47,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,578 INFO L175 Difference]: Start difference. First operand has 71 places, 185 transitions, 2244 flow. Second operand 3 states and 268 transitions. [2023-08-30 11:32:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 146 transitions, 1966 flow [2023-08-30 11:32:47,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 146 transitions, 1873 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:47,607 INFO L231 Difference]: Finished difference. Result has 70 places, 130 transitions, 1454 flow [2023-08-30 11:32:47,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1454, PETRI_PLACES=70, PETRI_TRANSITIONS=130} [2023-08-30 11:32:47,608 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 11:32:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 130 transitions, 1454 flow [2023-08-30 11:32:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:47,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:47,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 11:32:47,608 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 11:32:47,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -310441128, now seen corresponding path program 1 times [2023-08-30 11:32:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:47,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521937346] [2023-08-30 11:32:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:47,665 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 11:32:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521937346] [2023-08-30 11:32:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521937346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:47,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:47,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009756469] [2023-08-30 11:32:47,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:47,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-30 11:32:47,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 130 transitions, 1454 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:47,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-30 11:32:47,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:47,909 INFO L130 PetriNetUnfolder]: 1479/2812 cut-off events. [2023-08-30 11:32:47,909 INFO L131 PetriNetUnfolder]: For 13231/13349 co-relation queries the response was YES. [2023-08-30 11:32:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 2812 events. 1479/2812 cut-off events. For 13231/13349 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18333 event pairs, 1029 based on Foata normal form. 118/2922 useless extension candidates. Maximal degree in co-relation 10935. Up to 2808 conditions per place. [2023-08-30 11:32:47,922 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 126 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-08-30 11:32:47,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 129 transitions, 1706 flow [2023-08-30 11:32:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-30 11:32:47,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940269749518306 [2023-08-30 11:32:47,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-30 11:32:47,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-30 11:32:47,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:47,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-30 11:32:47,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,926 INFO L175 Difference]: Start difference. First operand has 70 places, 130 transitions, 1454 flow. Second operand 3 states and 254 transitions. [2023-08-30 11:32:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 129 transitions, 1706 flow [2023-08-30 11:32:47,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 1705 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:47,950 INFO L231 Difference]: Finished difference. Result has 70 places, 129 transitions, 1453 flow [2023-08-30 11:32:47,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1453, PETRI_PLACES=70, PETRI_TRANSITIONS=129} [2023-08-30 11:32:47,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 11:32:47,951 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 129 transitions, 1453 flow [2023-08-30 11:32:47,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:47,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:47,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 11:32:47,952 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 11:32:47,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -799674974, now seen corresponding path program 1 times [2023-08-30 11:32:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669212696] [2023-08-30 11:32:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:47,996 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 11:32:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669212696] [2023-08-30 11:32:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669212696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:47,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:47,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216696113] [2023-08-30 11:32:47,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:47,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:48,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-30 11:32:48,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 129 transitions, 1453 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:48,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-30 11:32:48,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:48,236 INFO L130 PetriNetUnfolder]: 1479/2733 cut-off events. [2023-08-30 11:32:48,237 INFO L131 PetriNetUnfolder]: For 13225/13343 co-relation queries the response was YES. [2023-08-30 11:32:48,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 2733 events. 1479/2733 cut-off events. For 13225/13343 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17271 event pairs, 1029 based on Foata normal form. 197/2922 useless extension candidates. Maximal degree in co-relation 10777. Up to 2729 conditions per place. [2023-08-30 11:32:48,249 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 124 selfloop transitions, 1 changer transitions 1/128 dead transitions. [2023-08-30 11:32:48,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 128 transitions, 1703 flow [2023-08-30 11:32:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 11:32:48,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48747591522157996 [2023-08-30 11:32:48,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 11:32:48,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 11:32:48,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:48,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 11:32:48,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,253 INFO L175 Difference]: Start difference. First operand has 70 places, 129 transitions, 1453 flow. Second operand 3 states and 253 transitions. [2023-08-30 11:32:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 128 transitions, 1703 flow [2023-08-30 11:32:48,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 128 transitions, 1702 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:48,283 INFO L231 Difference]: Finished difference. Result has 70 places, 127 transitions, 1449 flow [2023-08-30 11:32:48,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1449, PETRI_PLACES=70, PETRI_TRANSITIONS=127} [2023-08-30 11:32:48,284 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 11:32:48,285 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 127 transitions, 1449 flow [2023-08-30 11:32:48,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:48,285 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 11:32:48,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 11:32:48,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:48,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash -325022071, now seen corresponding path program 3 times [2023-08-30 11:32:48,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:48,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137905035] [2023-08-30 11:32:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:48,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:48,420 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 11:32:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137905035] [2023-08-30 11:32:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137905035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154066612] [2023-08-30 11:32:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:32:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:48,421 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 11:32:48,423 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 11:32:48,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 11:32:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:32:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:48,493 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 11:32:48,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:48,641 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 11:32:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154066612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:48,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:48,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 11:32:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250546503] [2023-08-30 11:32:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:48,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:32:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:32:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 11:32:48,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:48,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 127 transitions, 1449 flow. Second operand has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:48,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:48,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:48,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:49,551 INFO L130 PetriNetUnfolder]: 3975/7051 cut-off events. [2023-08-30 11:32:49,551 INFO L131 PetriNetUnfolder]: For 119469/119737 co-relation queries the response was YES. [2023-08-30 11:32:49,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27114 conditions, 7051 events. 3975/7051 cut-off events. For 119469/119737 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 45587 event pairs, 265 based on Foata normal form. 1120/8167 useless extension candidates. Maximal degree in co-relation 27080. Up to 1270 conditions per place. [2023-08-30 11:32:49,615 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 177 selfloop transitions, 323 changer transitions 0/502 dead transitions. [2023-08-30 11:32:49,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 502 transitions, 5516 flow [2023-08-30 11:32:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:32:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:32:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2246 transitions. [2023-08-30 11:32:49,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409441233140655 [2023-08-30 11:32:49,634 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2246 transitions. [2023-08-30 11:32:49,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2246 transitions. [2023-08-30 11:32:49,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:49,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2246 transitions. [2023-08-30 11:32:49,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.58333333333333) internal successors, (2246), 24 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:49,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:49,644 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:49,644 INFO L175 Difference]: Start difference. First operand has 70 places, 127 transitions, 1449 flow. Second operand 24 states and 2246 transitions. [2023-08-30 11:32:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 502 transitions, 5516 flow [2023-08-30 11:32:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 502 transitions, 5515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:49,701 INFO L231 Difference]: Finished difference. Result has 113 places, 348 transitions, 5567 flow [2023-08-30 11:32:49,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5567, PETRI_PLACES=113, PETRI_TRANSITIONS=348} [2023-08-30 11:32:49,702 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-08-30 11:32:49,702 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 348 transitions, 5567 flow [2023-08-30 11:32:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:49,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:49,703 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:49,721 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 11:32:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:49,909 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:49,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1086658960, now seen corresponding path program 2 times [2023-08-30 11:32:49,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:49,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534984934] [2023-08-30 11:32:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:32:49,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:49,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534984934] [2023-08-30 11:32:49,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534984934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:49,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138976521] [2023-08-30 11:32:49,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:49,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:49,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:50,002 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 11:32:50,029 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 11:32:50,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:32:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 11:32:50,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:32:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138976521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:50,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:32:50,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:32:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577178640] [2023-08-30 11:32:50,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:32:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 11:32:50,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 348 transitions, 5567 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:50,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:50,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 11:32:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:50,905 INFO L130 PetriNetUnfolder]: 3474/6153 cut-off events. [2023-08-30 11:32:50,905 INFO L131 PetriNetUnfolder]: For 73450/73712 co-relation queries the response was YES. [2023-08-30 11:32:50,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28006 conditions, 6153 events. 3474/6153 cut-off events. For 73450/73712 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 39936 event pairs, 2374 based on Foata normal form. 630/6775 useless extension candidates. Maximal degree in co-relation 27949. Up to 6149 conditions per place. [2023-08-30 11:32:50,934 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 286 selfloop transitions, 1 changer transitions 0/289 dead transitions. [2023-08-30 11:32:50,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 289 transitions, 4939 flow [2023-08-30 11:32:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 11:32:50,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951830443159923 [2023-08-30 11:32:50,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 11:32:50,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 11:32:50,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:50,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 11:32:50,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:50,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:50,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:50,937 INFO L175 Difference]: Start difference. First operand has 113 places, 348 transitions, 5567 flow. Second operand 3 states and 257 transitions. [2023-08-30 11:32:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 289 transitions, 4939 flow [2023-08-30 11:32:51,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 289 transitions, 3656 flow, removed 464 selfloop flow, removed 9 redundant places. [2023-08-30 11:32:51,140 INFO L231 Difference]: Finished difference. Result has 105 places, 289 transitions, 3084 flow [2023-08-30 11:32:51,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3084, PETRI_PLACES=105, PETRI_TRANSITIONS=289} [2023-08-30 11:32:51,141 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2023-08-30 11:32:51,141 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 289 transitions, 3084 flow [2023-08-30 11:32:51,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:51,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:51,141 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-30 11:32:51,149 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 11:32:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 11:32:51,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:51,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -415130039, now seen corresponding path program 4 times [2023-08-30 11:32:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:51,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938577656] [2023-08-30 11:32:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:51,709 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 11:32:51,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:51,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938577656] [2023-08-30 11:32:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938577656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505945218] [2023-08-30 11:32:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:32:51,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:51,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:51,713 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 11:32:51,732 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 11:32:51,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:32:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:32:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:51,824 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 11:32:51,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:52,536 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 11:32:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505945218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:52,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-08-30 11:32:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109943559] [2023-08-30 11:32:52,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:52,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 11:32:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 11:32:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 11:32:52,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:52,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 289 transitions, 3084 flow. Second operand has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:52,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:52,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:52,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:55,095 INFO L130 PetriNetUnfolder]: 8918/15712 cut-off events. [2023-08-30 11:32:55,095 INFO L131 PetriNetUnfolder]: For 806588/806866 co-relation queries the response was YES. [2023-08-30 11:32:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53678 conditions, 15712 events. 8918/15712 cut-off events. For 806588/806866 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 103551 event pairs, 387 based on Foata normal form. 1818/17528 useless extension candidates. Maximal degree in co-relation 53628. Up to 3280 conditions per place. [2023-08-30 11:32:55,158 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 205 selfloop transitions, 766 changer transitions 138/1111 dead transitions. [2023-08-30 11:32:55,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1111 transitions, 10543 flow [2023-08-30 11:32:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 11:32:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 11:32:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4455 transitions. [2023-08-30 11:32:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364884393063584 [2023-08-30 11:32:55,166 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4455 transitions. [2023-08-30 11:32:55,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4455 transitions. [2023-08-30 11:32:55,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:55,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4455 transitions. [2023-08-30 11:32:55,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 92.8125) internal successors, (4455), 48 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:55,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:55,194 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:55,194 INFO L175 Difference]: Start difference. First operand has 105 places, 289 transitions, 3084 flow. Second operand 48 states and 4455 transitions. [2023-08-30 11:32:55,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1111 transitions, 10543 flow [2023-08-30 11:32:55,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1111 transitions, 10542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:55,287 INFO L231 Difference]: Finished difference. Result has 197 places, 789 transitions, 10856 flow [2023-08-30 11:32:55,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=10856, PETRI_PLACES=197, PETRI_TRANSITIONS=789} [2023-08-30 11:32:55,288 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2023-08-30 11:32:55,288 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 789 transitions, 10856 flow [2023-08-30 11:32:55,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:55,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:55,290 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-08-30 11:32:55,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 11:32:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:32:55,496 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:32:55,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash -395911735, now seen corresponding path program 5 times [2023-08-30 11:32:55,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:55,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726307570] [2023-08-30 11:32:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:55,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:56,880 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 11:32:56,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726307570] [2023-08-30 11:32:56,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726307570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951767093] [2023-08-30 11:32:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:32:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:56,881 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 11:32:56,886 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 11:32:56,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-30 11:32:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:32:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:57,077 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 11:32:57,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:59,050 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 11:32:59,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951767093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:59,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:59,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-08-30 11:32:59,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097859723] [2023-08-30 11:32:59,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:59,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-08-30 11:32:59,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-08-30 11:32:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-08-30 11:32:59,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:32:59,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 789 transitions, 10856 flow. Second operand has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:59,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:59,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:32:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:12,809 INFO L130 PetriNetUnfolder]: 24442/42936 cut-off events. [2023-08-30 11:33:12,809 INFO L131 PetriNetUnfolder]: For 9369612/9370178 co-relation queries the response was YES. [2023-08-30 11:33:13,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180937 conditions, 42936 events. 24442/42936 cut-off events. For 9369612/9370178 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 300183 event pairs, 619 based on Foata normal form. 3594/46528 useless extension candidates. Maximal degree in co-relation 180840. Up to 11359 conditions per place. [2023-08-30 11:33:13,456 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 397 selfloop transitions, 2346 changer transitions 282/3027 dead transitions. [2023-08-30 11:33:13,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 3027 transitions, 41017 flow [2023-08-30 11:33:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 11:33:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 11:33:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8919 transitions. [2023-08-30 11:33:13,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370303468208093 [2023-08-30 11:33:13,471 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8919 transitions. [2023-08-30 11:33:13,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8919 transitions. [2023-08-30 11:33:13,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:13,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8919 transitions. [2023-08-30 11:33:13,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 92.90625) internal successors, (8919), 96 states have internal predecessors, (8919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:13,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:13,517 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:13,517 INFO L175 Difference]: Start difference. First operand has 197 places, 789 transitions, 10856 flow. Second operand 96 states and 8919 transitions. [2023-08-30 11:33:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 3027 transitions, 41017 flow [2023-08-30 11:33:16,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3027 transitions, 29461 flow, removed 5574 selfloop flow, removed 11 redundant places. [2023-08-30 11:33:16,047 INFO L231 Difference]: Finished difference. Result has 375 places, 2369 transitions, 31687 flow [2023-08-30 11:33:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=31687, PETRI_PLACES=375, PETRI_TRANSITIONS=2369} [2023-08-30 11:33:16,048 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2023-08-30 11:33:16,048 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 2369 transitions, 31687 flow [2023-08-30 11:33:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:16,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:16,051 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-08-30 11:33:16,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 11:33:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 11:33:16,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:33:16,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -360850231, now seen corresponding path program 6 times [2023-08-30 11:33:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:16,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757454921] [2023-08-30 11:33:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:20,929 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 11:33:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757454921] [2023-08-30 11:33:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757454921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322018175] [2023-08-30 11:33:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:33:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:20,930 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 11:33:20,932 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 11:33:21,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-08-30 11:33:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 11:33:21,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:21,246 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 11:33:21,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:29,106 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 11:33:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322018175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:29,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:29,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-08-30 11:33:29,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890185952] [2023-08-30 11:33:29,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:29,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-08-30 11:33:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-08-30 11:33:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-08-30 11:33:29,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:33:29,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 2369 transitions, 31687 flow. Second operand has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:29,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:29,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:33:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:07,472 INFO L130 PetriNetUnfolder]: 73950/129680 cut-off events. [2023-08-30 11:35:07,472 INFO L131 PetriNetUnfolder]: For 78281205/78282347 co-relation queries the response was YES. [2023-08-30 11:35:10,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546572 conditions, 129680 events. 73950/129680 cut-off events. For 78281205/78282347 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 976756 event pairs, 1043 based on Foata normal form. 7146/136824 useless extension candidates. Maximal degree in co-relation 546390. Up to 34111 conditions per place. [2023-08-30 11:35:10,903 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 781 selfloop transitions, 7814 changer transitions 570/9167 dead transitions. [2023-08-30 11:35:10,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 9167 transitions, 130600 flow [2023-08-30 11:35:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-08-30 11:35:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-08-30 11:35:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 17847 transitions. [2023-08-30 11:35:10,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373013005780347 [2023-08-30 11:35:10,941 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 17847 transitions. [2023-08-30 11:35:10,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 17847 transitions. [2023-08-30 11:35:10,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:10,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 17847 transitions. [2023-08-30 11:35:10,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 92.953125) internal successors, (17847), 192 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:10,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:10,994 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:10,994 INFO L175 Difference]: Start difference. First operand has 375 places, 2369 transitions, 31687 flow. Second operand 192 states and 17847 transitions. [2023-08-30 11:35:10,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 9167 transitions, 130600 flow [2023-08-30 11:35:26,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 9167 transitions, 90876 flow, removed 19230 selfloop flow, removed 23 redundant places. [2023-08-30 11:35:26,849 INFO L231 Difference]: Finished difference. Result has 733 places, 7837 transitions, 101542 flow [2023-08-30 11:35:26,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=27237, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=101542, PETRI_PLACES=733, PETRI_TRANSITIONS=7837} [2023-08-30 11:35:26,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 704 predicate places. [2023-08-30 11:35:26,867 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 7837 transitions, 101542 flow [2023-08-30 11:35:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:35:26,869 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-08-30 11:35:26,877 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 11:35:27,075 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,SelfDestructingSolverStorable17 [2023-08-30 11:35:27,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 11:35:27,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:35:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash 803068617, now seen corresponding path program 7 times [2023-08-30 11:35:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:35:27,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162907358] [2023-08-30 11:35:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:35:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:35:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:39,941 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 11:35:39,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:35:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162907358] [2023-08-30 11:35:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162907358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:35:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884405966] [2023-08-30 11:35:39,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:35:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:35:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:35:39,946 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 11:35:39,947 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 11:35:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:35:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2023-08-30 11:35:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:35:40,463 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 11:35:40,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:36:06,586 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 11:36:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884405966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:36:06,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:36:06,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-08-30 11:36:06,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650129764] [2023-08-30 11:36:06,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:36:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-08-30 11:36:06,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:36:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-08-30 11:36:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-08-30 11:36:08,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 11:36:08,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 7837 transitions, 101542 flow. Second operand has 385 states, 385 states have (on average 83.01038961038961) internal successors, (31959), 385 states have internal predecessors, (31959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:36:08,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:36:08,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 11:36:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15