./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.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/parallel-misc-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --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 11:16:03,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:16:03,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:16:03,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:16:03,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:16:03,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:16:03,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:16:03,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:16:03,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:16:03,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:16:03,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:16:03,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:16:03,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:16:03,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:16:03,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:16:03,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:16:03,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:16:03,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:16:03,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:16:03,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:16:03,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:16:03,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:16:03,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:16:03,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:16:03,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:16:03,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:16:03,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:16:03,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:16:03,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:16:03,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:16:03,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:16:03,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:16:03,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:16:03,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:16:03,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:16:03,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:16:03,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:16:03,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:16:03,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:16:03,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:16:03,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:16:03,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:16:03,744 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:16:03,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:16:03,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:16:03,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:16:03,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:16:03,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:16:03,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:16:03,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:16:03,747 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:16:03,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:16:03,748 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:16:03,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:16:03,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:16:03,750 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:16:03,750 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:16:03,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:16:03,750 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:16:03,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:16:03,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:16:03,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:16:03,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:16:03,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:16:03,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:16:03,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:16:03,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:16:03,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:16:03,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:16:03,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:16:03,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:16:03,753 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:16:03,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:16:03,753 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:16:03,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:16:04,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:16:04,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:16:04,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:16:04,088 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:16:04,088 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:16:04,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 11:16:05,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:16:05,621 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:16:05,621 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 11:16:05,631 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c76738b0/b568ebc177de4d92b5dbbb3660bbf296/FLAG7489d6b3d [2023-08-30 11:16:05,643 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c76738b0/b568ebc177de4d92b5dbbb3660bbf296 [2023-08-30 11:16:05,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:16:05,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:16:05,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:16:05,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:16:05,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:16:05,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306a61aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05, skipping insertion in model container [2023-08-30 11:16:05,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:16:05,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:16:05,830 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-30 11:16:05,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:16:05,845 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:16:05,883 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-30 11:16:05,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:16:05,893 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:16:05,893 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:16:05,899 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:16:05,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05 WrapperNode [2023-08-30 11:16:05,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:16:05,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:16:05,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:16:05,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:16:05,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,952 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 165 [2023-08-30 11:16:05,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:16:05,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:16:05,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:16:05,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:16:05,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:05,996 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:06,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:06,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:16:06,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:16:06,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:16:06,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:16:06,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (1/1) ... [2023-08-30 11:16:06,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:16:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:06,041 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 11:16:06,065 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 11:16:06,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:16:06,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:16:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:16:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:16:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:16:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:16:06,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:16:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:16:06,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:16:06,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:16:06,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:16:06,089 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 11:16:06,205 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:16:06,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:16:06,482 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:16:06,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:16:06,648 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 11:16:06,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:16:06 BoogieIcfgContainer [2023-08-30 11:16:06,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:16:06,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:16:06,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:16:06,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:16:06,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:16:05" (1/3) ... [2023-08-30 11:16:06,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27831953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:16:06, skipping insertion in model container [2023-08-30 11:16:06,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:16:05" (2/3) ... [2023-08-30 11:16:06,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27831953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:16:06, skipping insertion in model container [2023-08-30 11:16:06,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:16:06" (3/3) ... [2023-08-30 11:16:06,658 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-30 11:16:06,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:16:06,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:16:06,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 11:16:06,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:16:06,786 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:16:06,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 124 transitions, 272 flow [2023-08-30 11:16:06,891 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-08-30 11:16:06,892 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:16:06,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 7/121 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 173 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 11:16:06,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 124 transitions, 272 flow [2023-08-30 11:16:06,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 224 flow [2023-08-30 11:16:06,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:16:06,918 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 224 flow [2023-08-30 11:16:06,920 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 224 flow [2023-08-30 11:16:06,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 224 flow [2023-08-30 11:16:06,972 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2023-08-30 11:16:06,973 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:16:06,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 106 events. 7/106 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 173 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 11:16:06,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 2456 [2023-08-30 11:16:11,953 INFO L134 LiptonReduction]: Checked pairs total: 4008 [2023-08-30 11:16:11,953 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 11:16:11,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:16:11,970 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;@3decc26e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:16:11,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-08-30 11:16:11,974 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 11:16:11,974 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:16:11,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:11,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:16:11,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:11,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 18741990, now seen corresponding path program 1 times [2023-08-30 11:16:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:11,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688575613] [2023-08-30 11:16:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:11,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:12,328 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 11:16:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688575613] [2023-08-30 11:16:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688575613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:12,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:16:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587586070] [2023-08-30 11:16:12,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:12,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:12,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:12,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:12,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:12,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:12,775 INFO L130 PetriNetUnfolder]: 1625/2579 cut-off events. [2023-08-30 11:16:12,775 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-08-30 11:16:12,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5420 conditions, 2579 events. 1625/2579 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 17812 event pairs, 459 based on Foata normal form. 0/1205 useless extension candidates. Maximal degree in co-relation 4985. Up to 1761 conditions per place. [2023-08-30 11:16:12,794 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 47 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 11:16:12,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 225 flow [2023-08-30 11:16:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-30 11:16:12,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44712182061579653 [2023-08-30 11:16:12,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-30 11:16:12,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-30 11:16:12,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:12,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-30 11:16:12,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,822 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 80 flow. Second operand 3 states and 334 transitions. [2023-08-30 11:16:12,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 225 flow [2023-08-30 11:16:12,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:16:12,832 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 90 flow [2023-08-30 11:16:12,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-30 11:16:12,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-30 11:16:12,838 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 90 flow [2023-08-30 11:16:12,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:16:12,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:16:12,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:12,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:12,840 INFO L85 PathProgramCache]: Analyzing trace with hash 18741992, now seen corresponding path program 1 times [2023-08-30 11:16:12,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:12,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769219999] [2023-08-30 11:16:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:12,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:12,968 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 11:16:12,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:12,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769219999] [2023-08-30 11:16:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769219999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:16:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907685228] [2023-08-30 11:16:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:12,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:12,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:12,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:12,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:13,326 INFO L130 PetriNetUnfolder]: 2221/3195 cut-off events. [2023-08-30 11:16:13,327 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-30 11:16:13,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 3195 events. 2221/3195 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 16601 event pairs, 511 based on Foata normal form. 0/1435 useless extension candidates. Maximal degree in co-relation 6384. Up to 3037 conditions per place. [2023-08-30 11:16:13,343 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 38 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-30 11:16:13,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 216 flow [2023-08-30 11:16:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-30 11:16:13,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350736278447122 [2023-08-30 11:16:13,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-30 11:16:13,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-30 11:16:13,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:13,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-30 11:16:13,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,351 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 90 flow. Second operand 3 states and 325 transitions. [2023-08-30 11:16:13,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 216 flow [2023-08-30 11:16:13,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:13,353 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 140 flow [2023-08-30 11:16:13,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-30 11:16:13,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 11:16:13,355 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 140 flow [2023-08-30 11:16:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:13,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:16:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:16:13,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:13,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash 831194038, now seen corresponding path program 1 times [2023-08-30 11:16:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365715011] [2023-08-30 11:16:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:13,413 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 11:16:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:13,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365715011] [2023-08-30 11:16:13,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365715011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:13,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:13,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:16:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837253913] [2023-08-30 11:16:13,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:13,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:13,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:13,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:13,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:13,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:13,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:13,653 INFO L130 PetriNetUnfolder]: 1435/2194 cut-off events. [2023-08-30 11:16:13,653 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2023-08-30 11:16:13,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5924 conditions, 2194 events. 1435/2194 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 13757 event pairs, 1211 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 3665. Up to 2172 conditions per place. [2023-08-30 11:16:13,678 INFO L137 encePairwiseOnDemand]: 246/249 looper letters, 31 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 11:16:13,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 196 flow [2023-08-30 11:16:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-30 11:16:13,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069611780455154 [2023-08-30 11:16:13,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-30 11:16:13,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-30 11:16:13,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:13,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-30 11:16:13,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,685 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 140 flow. Second operand 3 states and 304 transitions. [2023-08-30 11:16:13,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 196 flow [2023-08-30 11:16:13,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:13,687 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 128 flow [2023-08-30 11:16:13,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-30 11:16:13,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 11:16:13,688 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 128 flow [2023-08-30 11:16:13,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:13,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:16:13,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 11:16:13,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:13,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 831194033, now seen corresponding path program 1 times [2023-08-30 11:16:13,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:13,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264098475] [2023-08-30 11:16:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:13,729 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 11:16:13,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264098475] [2023-08-30 11:16:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264098475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:13,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:13,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:16:13,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859969846] [2023-08-30 11:16:13,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:13,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:13,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:13,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:13,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:13,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:13,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:13,933 INFO L130 PetriNetUnfolder]: 1330/2032 cut-off events. [2023-08-30 11:16:13,933 INFO L131 PetriNetUnfolder]: For 404/404 co-relation queries the response was YES. [2023-08-30 11:16:13,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 2032 events. 1330/2032 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 12427 event pairs, 1107 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 5397. Up to 2012 conditions per place. [2023-08-30 11:16:13,944 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 11:16:13,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 186 flow [2023-08-30 11:16:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-30 11:16:13,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042838018741633 [2023-08-30 11:16:13,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-30 11:16:13,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-30 11:16:13,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:13,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-30 11:16:13,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,950 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 128 flow. Second operand 3 states and 302 transitions. [2023-08-30 11:16:13,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 186 flow [2023-08-30 11:16:13,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:13,951 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 125 flow [2023-08-30 11:16:13,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-30 11:16:13,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 11:16:13,953 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 125 flow [2023-08-30 11:16:13,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:13,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:13,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:16:13,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:16:13,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:13,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash 831194036, now seen corresponding path program 1 times [2023-08-30 11:16:13,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:13,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296781986] [2023-08-30 11:16:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:13,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:14,107 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 11:16:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296781986] [2023-08-30 11:16:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296781986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391130608] [2023-08-30 11:16:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:14,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:14,117 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 11:16:14,146 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 11:16:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:16:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:14,374 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 11:16:14,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:14,817 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 11:16:14,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391130608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:14,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:14,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 11:16:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434922522] [2023-08-30 11:16:14,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:16:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:16:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:16:14,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:16:14,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 91.5) internal successors, (732), 8 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:14,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:14,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:16:14,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:15,633 INFO L130 PetriNetUnfolder]: 4261/6319 cut-off events. [2023-08-30 11:16:15,633 INFO L131 PetriNetUnfolder]: For 900/900 co-relation queries the response was YES. [2023-08-30 11:16:15,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16535 conditions, 6319 events. 4261/6319 cut-off events. For 900/900 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 36225 event pairs, 145 based on Foata normal form. 20/3851 useless extension candidates. Maximal degree in co-relation 16524. Up to 2787 conditions per place. [2023-08-30 11:16:15,679 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 101 selfloop transitions, 54 changer transitions 0/159 dead transitions. [2023-08-30 11:16:15,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 159 transitions, 836 flow [2023-08-30 11:16:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:16:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:16:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 978 transitions. [2023-08-30 11:16:15,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364123159303882 [2023-08-30 11:16:15,684 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 978 transitions. [2023-08-30 11:16:15,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 978 transitions. [2023-08-30 11:16:15,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:15,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 978 transitions. [2023-08-30 11:16:15,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.66666666666667) internal successors, (978), 9 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:15,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:15,693 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:15,693 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 125 flow. Second operand 9 states and 978 transitions. [2023-08-30 11:16:15,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 159 transitions, 836 flow [2023-08-30 11:16:15,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 159 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:15,698 INFO L231 Difference]: Finished difference. Result has 53 places, 86 transitions, 590 flow [2023-08-30 11:16:15,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=590, PETRI_PLACES=53, PETRI_TRANSITIONS=86} [2023-08-30 11:16:15,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-30 11:16:15,700 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 86 transitions, 590 flow [2023-08-30 11:16:15,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.5) internal successors, (732), 8 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:15,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:15,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:16:15,710 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 11:16:15,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:15,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:15,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 836238345, now seen corresponding path program 1 times [2023-08-30 11:16:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:15,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460412429] [2023-08-30 11:16:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:16,020 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 11:16:16,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460412429] [2023-08-30 11:16:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460412429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:16:16,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139647982] [2023-08-30 11:16:16,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:16,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:16,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:16,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:16:16,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 86 transitions, 590 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:16,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:16:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:16,646 INFO L130 PetriNetUnfolder]: 3631/5301 cut-off events. [2023-08-30 11:16:16,646 INFO L131 PetriNetUnfolder]: For 11594/11594 co-relation queries the response was YES. [2023-08-30 11:16:16,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19500 conditions, 5301 events. 3631/5301 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 29190 event pairs, 673 based on Foata normal form. 84/4477 useless extension candidates. Maximal degree in co-relation 19482. Up to 4283 conditions per place. [2023-08-30 11:16:16,685 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 99 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-08-30 11:16:16,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 931 flow [2023-08-30 11:16:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-30 11:16:16,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-30 11:16:16,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-30 11:16:16,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-30 11:16:16,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:16,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-30 11:16:16,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,695 INFO L175 Difference]: Start difference. First operand has 53 places, 86 transitions, 590 flow. Second operand 3 states and 315 transitions. [2023-08-30 11:16:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 931 flow [2023-08-30 11:16:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 109 transitions, 886 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:16,733 INFO L231 Difference]: Finished difference. Result has 55 places, 83 transitions, 574 flow [2023-08-30 11:16:16,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=55, PETRI_TRANSITIONS=83} [2023-08-30 11:16:16,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-30 11:16:16,736 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 83 transitions, 574 flow [2023-08-30 11:16:16,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:16,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:16:16,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:16,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash 466034312, now seen corresponding path program 1 times [2023-08-30 11:16:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648646050] [2023-08-30 11:16:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:16,913 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 11:16:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:16,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648646050] [2023-08-30 11:16:16,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648646050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:16,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:16,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:16:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464872357] [2023-08-30 11:16:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:16:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:16:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:16:16,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 249 [2023-08-30 11:16:16,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 83 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:16,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:16,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 249 [2023-08-30 11:16:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:17,497 INFO L130 PetriNetUnfolder]: 3233/4769 cut-off events. [2023-08-30 11:16:17,497 INFO L131 PetriNetUnfolder]: For 11642/11642 co-relation queries the response was YES. [2023-08-30 11:16:17,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17688 conditions, 4769 events. 3233/4769 cut-off events. For 11642/11642 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 26080 event pairs, 323 based on Foata normal form. 90/4315 useless extension candidates. Maximal degree in co-relation 17668. Up to 3726 conditions per place. [2023-08-30 11:16:17,532 INFO L137 encePairwiseOnDemand]: 245/249 looper letters, 97 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-08-30 11:16:17,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 108 transitions, 880 flow [2023-08-30 11:16:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:16:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:16:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2023-08-30 11:16:17,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39036144578313253 [2023-08-30 11:16:17,535 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2023-08-30 11:16:17,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2023-08-30 11:16:17,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:17,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2023-08-30 11:16:17,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.2) internal successors, (486), 5 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,538 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,539 INFO L175 Difference]: Start difference. First operand has 55 places, 83 transitions, 574 flow. Second operand 5 states and 486 transitions. [2023-08-30 11:16:17,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 108 transitions, 880 flow [2023-08-30 11:16:17,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 108 transitions, 862 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:17,576 INFO L231 Difference]: Finished difference. Result has 54 places, 74 transitions, 505 flow [2023-08-30 11:16:17,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=54, PETRI_TRANSITIONS=74} [2023-08-30 11:16:17,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-30 11:16:17,577 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 74 transitions, 505 flow [2023-08-30 11:16:17,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:17,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:17,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 11:16:17,579 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:17,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash 465530248, now seen corresponding path program 1 times [2023-08-30 11:16:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:17,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956939362] [2023-08-30 11:16:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:17,682 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 11:16:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956939362] [2023-08-30 11:16:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956939362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:16:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921794972] [2023-08-30 11:16:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:17,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:17,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 74 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:17,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:17,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:18,228 INFO L130 PetriNetUnfolder]: 3309/5170 cut-off events. [2023-08-30 11:16:18,228 INFO L131 PetriNetUnfolder]: For 13142/13142 co-relation queries the response was YES. [2023-08-30 11:16:18,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18358 conditions, 5170 events. 3309/5170 cut-off events. For 13142/13142 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 32722 event pairs, 859 based on Foata normal form. 149/4786 useless extension candidates. Maximal degree in co-relation 18339. Up to 3449 conditions per place. [2023-08-30 11:16:18,261 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 105 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-30 11:16:18,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 117 transitions, 1012 flow [2023-08-30 11:16:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-30 11:16:18,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428380187416332 [2023-08-30 11:16:18,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-30 11:16:18,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-30 11:16:18,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:18,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-30 11:16:18,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,267 INFO L175 Difference]: Start difference. First operand has 54 places, 74 transitions, 505 flow. Second operand 3 states and 320 transitions. [2023-08-30 11:16:18,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 117 transitions, 1012 flow [2023-08-30 11:16:18,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 117 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:18,286 INFO L231 Difference]: Finished difference. Result has 54 places, 77 transitions, 574 flow [2023-08-30 11:16:18,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=54, PETRI_TRANSITIONS=77} [2023-08-30 11:16:18,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-30 11:16:18,287 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 77 transitions, 574 flow [2023-08-30 11:16:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:18,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 11:16:18,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:18,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash -75606043, now seen corresponding path program 1 times [2023-08-30 11:16:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:18,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52010639] [2023-08-30 11:16:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:18,356 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 11:16:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52010639] [2023-08-30 11:16:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52010639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:18,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:18,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:16:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710296221] [2023-08-30 11:16:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:16:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:16:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:16:18,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:18,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 77 transitions, 574 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:18,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:19,019 INFO L130 PetriNetUnfolder]: 3303/5301 cut-off events. [2023-08-30 11:16:19,019 INFO L131 PetriNetUnfolder]: For 13260/13260 co-relation queries the response was YES. [2023-08-30 11:16:19,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19395 conditions, 5301 events. 3303/5301 cut-off events. For 13260/13260 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34035 event pairs, 169 based on Foata normal form. 130/5067 useless extension candidates. Maximal degree in co-relation 19376. Up to 3433 conditions per place. [2023-08-30 11:16:19,068 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 77 selfloop transitions, 41 changer transitions 0/122 dead transitions. [2023-08-30 11:16:19,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 122 transitions, 1082 flow [2023-08-30 11:16:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:16:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:16:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-30 11:16:19,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42771084337349397 [2023-08-30 11:16:19,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-30 11:16:19,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-30 11:16:19,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:19,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-30 11:16:19,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,075 INFO L175 Difference]: Start difference. First operand has 54 places, 77 transitions, 574 flow. Second operand 4 states and 426 transitions. [2023-08-30 11:16:19,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 122 transitions, 1082 flow [2023-08-30 11:16:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 122 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:19,094 INFO L231 Difference]: Finished difference. Result has 58 places, 102 transitions, 1015 flow [2023-08-30 11:16:19,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1015, PETRI_PLACES=58, PETRI_TRANSITIONS=102} [2023-08-30 11:16:19,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-30 11:16:19,095 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 102 transitions, 1015 flow [2023-08-30 11:16:19,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:19,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 11:16:19,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:16:19,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:19,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:19,097 INFO L85 PathProgramCache]: Analyzing trace with hash -86438593, now seen corresponding path program 1 times [2023-08-30 11:16:19,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:19,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79152115] [2023-08-30 11:16:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79152115] [2023-08-30 11:16:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79152115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:19,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:19,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:16:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940207527] [2023-08-30 11:16:19,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:19,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:19,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 102 transitions, 1015 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:19,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:19,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:19,570 INFO L130 PetriNetUnfolder]: 2333/3634 cut-off events. [2023-08-30 11:16:19,570 INFO L131 PetriNetUnfolder]: For 22369/22369 co-relation queries the response was YES. [2023-08-30 11:16:19,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14741 conditions, 3634 events. 2333/3634 cut-off events. For 22369/22369 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 22278 event pairs, 1459 based on Foata normal form. 391/3608 useless extension candidates. Maximal degree in co-relation 14719. Up to 3510 conditions per place. [2023-08-30 11:16:19,597 INFO L137 encePairwiseOnDemand]: 246/249 looper letters, 73 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-30 11:16:19,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 853 flow [2023-08-30 11:16:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-30 11:16:19,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40160642570281124 [2023-08-30 11:16:19,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-30 11:16:19,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-30 11:16:19,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:19,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-30 11:16:19,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,602 INFO L175 Difference]: Start difference. First operand has 58 places, 102 transitions, 1015 flow. Second operand 3 states and 300 transitions. [2023-08-30 11:16:19,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 853 flow [2023-08-30 11:16:19,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 835 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:19,618 INFO L231 Difference]: Finished difference. Result has 55 places, 78 transitions, 689 flow [2023-08-30 11:16:19,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=689, PETRI_PLACES=55, PETRI_TRANSITIONS=78} [2023-08-30 11:16:19,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-30 11:16:19,620 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 78 transitions, 689 flow [2023-08-30 11:16:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:19,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 11:16:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 11:16:19,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:19,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash -86438590, now seen corresponding path program 1 times [2023-08-30 11:16:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:19,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365496896] [2023-08-30 11:16:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365496896] [2023-08-30 11:16:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365496896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058058692] [2023-08-30 11:16:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:19,761 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 11:16:19,770 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 11:16:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:16:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:19,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058058692] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:20,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:20,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 11:16:20,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276659408] [2023-08-30 11:16:20,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:20,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 11:16:20,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 11:16:20,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-08-30 11:16:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:16:20,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 78 transitions, 689 flow. Second operand has 10 states, 10 states have (on average 91.4) internal successors, (914), 10 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:20,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:20,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:16:20,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:21,445 INFO L130 PetriNetUnfolder]: 3489/5589 cut-off events. [2023-08-30 11:16:21,445 INFO L131 PetriNetUnfolder]: For 21818/21818 co-relation queries the response was YES. [2023-08-30 11:16:21,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21660 conditions, 5589 events. 3489/5589 cut-off events. For 21818/21818 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34201 event pairs, 57 based on Foata normal form. 450/5483 useless extension candidates. Maximal degree in co-relation 21638. Up to 2025 conditions per place. [2023-08-30 11:16:21,483 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 124 selfloop transitions, 98 changer transitions 0/226 dead transitions. [2023-08-30 11:16:21,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 226 transitions, 2018 flow [2023-08-30 11:16:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 11:16:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 11:16:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1157 transitions. [2023-08-30 11:16:21,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224169404892296 [2023-08-30 11:16:21,488 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1157 transitions. [2023-08-30 11:16:21,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1157 transitions. [2023-08-30 11:16:21,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:21,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1157 transitions. [2023-08-30 11:16:21,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:21,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:21,497 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:21,497 INFO L175 Difference]: Start difference. First operand has 55 places, 78 transitions, 689 flow. Second operand 11 states and 1157 transitions. [2023-08-30 11:16:21,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 226 transitions, 2018 flow [2023-08-30 11:16:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 226 transitions, 2017 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:21,518 INFO L231 Difference]: Finished difference. Result has 68 places, 139 transitions, 1657 flow [2023-08-30 11:16:21,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1657, PETRI_PLACES=68, PETRI_TRANSITIONS=139} [2023-08-30 11:16:21,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2023-08-30 11:16:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 139 transitions, 1657 flow [2023-08-30 11:16:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.4) internal successors, (914), 10 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:21,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:21,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 11:16:21,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:16:21,725 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,SelfDestructingSolverStorable10 [2023-08-30 11:16:21,726 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:21,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash -86438592, now seen corresponding path program 1 times [2023-08-30 11:16:21,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:21,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323684392] [2023-08-30 11:16:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323684392] [2023-08-30 11:16:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323684392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568816537] [2023-08-30 11:16:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:21,855 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 11:16:21,858 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 11:16:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:21,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 11:16:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:22,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568816537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:22,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:22,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-30 11:16:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343988641] [2023-08-30 11:16:22,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:16:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:16:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-08-30 11:16:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:16:22,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 139 transitions, 1657 flow. Second operand has 11 states, 11 states have (on average 91.36363636363636) internal successors, (1005), 11 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:22,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:22,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:16:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:24,397 INFO L130 PetriNetUnfolder]: 6123/9849 cut-off events. [2023-08-30 11:16:24,398 INFO L131 PetriNetUnfolder]: For 60610/60610 co-relation queries the response was YES. [2023-08-30 11:16:24,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45669 conditions, 9849 events. 6123/9849 cut-off events. For 60610/60610 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 66990 event pairs, 193 based on Foata normal form. 106/9427 useless extension candidates. Maximal degree in co-relation 45642. Up to 3347 conditions per place. [2023-08-30 11:16:24,489 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 296 selfloop transitions, 148 changer transitions 0/448 dead transitions. [2023-08-30 11:16:24,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 448 transitions, 5266 flow [2023-08-30 11:16:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:16:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:16:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1680 transitions. [2023-08-30 11:16:24,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-30 11:16:24,495 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1680 transitions. [2023-08-30 11:16:24,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1680 transitions. [2023-08-30 11:16:24,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:24,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1680 transitions. [2023-08-30 11:16:24,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 105.0) internal successors, (1680), 16 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:24,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:24,506 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:24,506 INFO L175 Difference]: Start difference. First operand has 68 places, 139 transitions, 1657 flow. Second operand 16 states and 1680 transitions. [2023-08-30 11:16:24,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 448 transitions, 5266 flow [2023-08-30 11:16:24,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 448 transitions, 4619 flow, removed 242 selfloop flow, removed 4 redundant places. [2023-08-30 11:16:24,631 INFO L231 Difference]: Finished difference. Result has 90 places, 248 transitions, 3271 flow [2023-08-30 11:16:24,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3271, PETRI_PLACES=90, PETRI_TRANSITIONS=248} [2023-08-30 11:16:24,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-08-30 11:16:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 248 transitions, 3271 flow [2023-08-30 11:16:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 91.36363636363636) internal successors, (1005), 11 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:24,643 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 11:16:24,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:24,838 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:24,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash -178247048, now seen corresponding path program 1 times [2023-08-30 11:16:24,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:24,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396274773] [2023-08-30 11:16:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396274773] [2023-08-30 11:16:25,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396274773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501444196] [2023-08-30 11:16:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:25,054 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 11:16:25,056 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 11:16:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 11:16:25,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:25,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:16:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501444196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:25,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:16:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-30 11:16:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51158119] [2023-08-30 11:16:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:25,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:16:25,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:25,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 248 transitions, 3271 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:25,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:25,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:25,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:26,581 INFO L130 PetriNetUnfolder]: 5341/8748 cut-off events. [2023-08-30 11:16:26,581 INFO L131 PetriNetUnfolder]: For 84324/84324 co-relation queries the response was YES. [2023-08-30 11:16:26,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41629 conditions, 8748 events. 5341/8748 cut-off events. For 84324/84324 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 62753 event pairs, 3525 based on Foata normal form. 658/8859 useless extension candidates. Maximal degree in co-relation 41591. Up to 8244 conditions per place. [2023-08-30 11:16:26,672 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 194 selfloop transitions, 1 changer transitions 0/199 dead transitions. [2023-08-30 11:16:26,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 199 transitions, 3011 flow [2023-08-30 11:16:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-30 11:16:26,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989290495314592 [2023-08-30 11:16:26,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-30 11:16:26,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-30 11:16:26,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:26,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-30 11:16:26,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:26,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:26,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:26,678 INFO L175 Difference]: Start difference. First operand has 90 places, 248 transitions, 3271 flow. Second operand 3 states and 298 transitions. [2023-08-30 11:16:26,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 199 transitions, 3011 flow [2023-08-30 11:16:26,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 199 transitions, 2825 flow, removed 86 selfloop flow, removed 4 redundant places. [2023-08-30 11:16:26,969 INFO L231 Difference]: Finished difference. Result has 86 places, 199 transitions, 2437 flow [2023-08-30 11:16:26,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2437, PETRI_PLACES=86, PETRI_TRANSITIONS=199} [2023-08-30 11:16:26,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-30 11:16:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 199 transitions, 2437 flow [2023-08-30 11:16:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:26,983 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 11:16:27,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:27,177 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:27,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1511696266, now seen corresponding path program 1 times [2023-08-30 11:16:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421557006] [2023-08-30 11:16:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:27,307 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 11:16:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421557006] [2023-08-30 11:16:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421557006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644996005] [2023-08-30 11:16:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:27,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:27,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:27,310 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 11:16:27,312 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 11:16:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:16:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:27,446 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 11:16:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:27,630 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 11:16:27,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644996005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:27,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:27,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2023-08-30 11:16:27,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825827955] [2023-08-30 11:16:27,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:16:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:16:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:16:27,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:16:27,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 199 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 90.375) internal successors, (723), 8 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:27,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:27,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:16:27,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:30,102 INFO L130 PetriNetUnfolder]: 9911/16699 cut-off events. [2023-08-30 11:16:30,102 INFO L131 PetriNetUnfolder]: For 133792/133792 co-relation queries the response was YES. [2023-08-30 11:16:30,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76418 conditions, 16699 events. 9911/16699 cut-off events. For 133792/133792 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 131126 event pairs, 791 based on Foata normal form. 236/16679 useless extension candidates. Maximal degree in co-relation 76380. Up to 4133 conditions per place. [2023-08-30 11:16:30,262 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 446 selfloop transitions, 100 changer transitions 0/550 dead transitions. [2023-08-30 11:16:30,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 550 transitions, 7735 flow [2023-08-30 11:16:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:16:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:16:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 813 transitions. [2023-08-30 11:16:30,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40813253012048195 [2023-08-30 11:16:30,266 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 813 transitions. [2023-08-30 11:16:30,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 813 transitions. [2023-08-30 11:16:30,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:30,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 813 transitions. [2023-08-30 11:16:30,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,272 INFO L175 Difference]: Start difference. First operand has 86 places, 199 transitions, 2437 flow. Second operand 8 states and 813 transitions. [2023-08-30 11:16:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 550 transitions, 7735 flow [2023-08-30 11:16:30,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 550 transitions, 7734 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:30,986 INFO L231 Difference]: Finished difference. Result has 95 places, 246 transitions, 3536 flow [2023-08-30 11:16:30,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=95, PETRI_TRANSITIONS=246} [2023-08-30 11:16:30,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-30 11:16:30,987 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 246 transitions, 3536 flow [2023-08-30 11:16:30,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.375) internal successors, (723), 8 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:30,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:30,995 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 11:16:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 11:16:31,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:31,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2048919237, now seen corresponding path program 1 times [2023-08-30 11:16:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80398455] [2023-08-30 11:16:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80398455] [2023-08-30 11:16:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80398455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664621603] [2023-08-30 11:16:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:31,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:31,397 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 11:16:31,400 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 11:16:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:31,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:16:31,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:31,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:32,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664621603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:32,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:16:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316292062] [2023-08-30 11:16:32,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:32,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:16:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:16:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:16:32,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:16:32,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 246 transitions, 3536 flow. Second operand has 14 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:32,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:32,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:16:32,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:37,688 INFO L130 PetriNetUnfolder]: 18105/29459 cut-off events. [2023-08-30 11:16:37,688 INFO L131 PetriNetUnfolder]: For 378216/378216 co-relation queries the response was YES. [2023-08-30 11:16:37,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152546 conditions, 29459 events. 18105/29459 cut-off events. For 378216/378216 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 238805 event pairs, 409 based on Foata normal form. 1388/30789 useless extension candidates. Maximal degree in co-relation 152504. Up to 7793 conditions per place. [2023-08-30 11:16:38,140 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 276 selfloop transitions, 422 changer transitions 0/702 dead transitions. [2023-08-30 11:16:38,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 702 transitions, 10474 flow [2023-08-30 11:16:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:16:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:16:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1932 transitions. [2023-08-30 11:16:38,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083703233988586 [2023-08-30 11:16:38,146 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1932 transitions. [2023-08-30 11:16:38,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1932 transitions. [2023-08-30 11:16:38,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:38,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1932 transitions. [2023-08-30 11:16:38,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.6842105263158) internal successors, (1932), 19 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:38,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:38,160 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:38,160 INFO L175 Difference]: Start difference. First operand has 95 places, 246 transitions, 3536 flow. Second operand 19 states and 1932 transitions. [2023-08-30 11:16:38,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 702 transitions, 10474 flow [2023-08-30 11:16:39,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 702 transitions, 10380 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:39,475 INFO L231 Difference]: Finished difference. Result has 124 places, 549 transitions, 10282 flow [2023-08-30 11:16:39,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10282, PETRI_PLACES=124, PETRI_TRANSITIONS=549} [2023-08-30 11:16:39,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2023-08-30 11:16:39,476 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 549 transitions, 10282 flow [2023-08-30 11:16:39,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:39,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:39,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:39,483 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 11:16:39,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 11:16:39,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:39,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash 745819166, now seen corresponding path program 1 times [2023-08-30 11:16:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218641341] [2023-08-30 11:16:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:39,867 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 11:16:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218641341] [2023-08-30 11:16:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218641341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259325671] [2023-08-30 11:16:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:39,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:39,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:39,869 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 11:16:39,894 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 11:16:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:39,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 11:16:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:39,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:16:39,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259325671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:39,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:16:39,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-30 11:16:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352361983] [2023-08-30 11:16:39,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:16:40,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 11:16:40,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 549 transitions, 10282 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:40,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:40,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 11:16:40,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:44,821 INFO L130 PetriNetUnfolder]: 15757/25922 cut-off events. [2023-08-30 11:16:44,821 INFO L131 PetriNetUnfolder]: For 538690/538690 co-relation queries the response was YES. [2023-08-30 11:16:44,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151052 conditions, 25922 events. 15757/25922 cut-off events. For 538690/538690 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 217034 event pairs, 10381 based on Foata normal form. 1592/27315 useless extension candidates. Maximal degree in co-relation 150997. Up to 24142 conditions per place. [2023-08-30 11:16:45,048 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 438 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2023-08-30 11:16:45,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 443 transitions, 9156 flow [2023-08-30 11:16:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-30 11:16:45,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39759036144578314 [2023-08-30 11:16:45,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-30 11:16:45,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-30 11:16:45,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:45,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-30 11:16:45,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:45,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:45,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:45,054 INFO L175 Difference]: Start difference. First operand has 124 places, 549 transitions, 10282 flow. Second operand 3 states and 297 transitions. [2023-08-30 11:16:45,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 443 transitions, 9156 flow [2023-08-30 11:16:48,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 443 transitions, 7977 flow, removed 537 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:48,892 INFO L231 Difference]: Finished difference. Result has 121 places, 443 transitions, 7101 flow [2023-08-30 11:16:48,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7099, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7101, PETRI_PLACES=121, PETRI_TRANSITIONS=443} [2023-08-30 11:16:48,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2023-08-30 11:16:48,893 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 443 transitions, 7101 flow [2023-08-30 11:16:48,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:48,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:48,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:48,898 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 11:16:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:49,094 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:49,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2048284621, now seen corresponding path program 1 times [2023-08-30 11:16:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135349559] [2023-08-30 11:16:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:49,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135349559] [2023-08-30 11:16:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135349559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104672664] [2023-08-30 11:16:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:49,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:49,275 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 11:16:49,297 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 11:16:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:16:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:49,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104672664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:50,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 11:16:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914843205] [2023-08-30 11:16:50,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:16:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:16:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:16:50,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 249 [2023-08-30 11:16:50,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 443 transitions, 7101 flow. Second operand has 13 states, 13 states have (on average 86.76923076923077) internal successors, (1128), 13 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:50,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:50,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 249 [2023-08-30 11:16:50,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:55,957 INFO L130 PetriNetUnfolder]: 17833/29679 cut-off events. [2023-08-30 11:16:55,957 INFO L131 PetriNetUnfolder]: For 468780/468780 co-relation queries the response was YES. [2023-08-30 11:16:56,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158697 conditions, 29679 events. 17833/29679 cut-off events. For 468780/468780 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 248962 event pairs, 511 based on Foata normal form. 886/30561 useless extension candidates. Maximal degree in co-relation 158642. Up to 12071 conditions per place. [2023-08-30 11:16:56,484 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 332 selfloop transitions, 363 changer transitions 0/699 dead transitions. [2023-08-30 11:16:56,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 699 transitions, 11278 flow [2023-08-30 11:16:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:16:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:16:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1657 transitions. [2023-08-30 11:16:56,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39144814552326956 [2023-08-30 11:16:56,489 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1657 transitions. [2023-08-30 11:16:56,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1657 transitions. [2023-08-30 11:16:56,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:56,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1657 transitions. [2023-08-30 11:16:56,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 97.47058823529412) internal successors, (1657), 17 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:56,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 249.0) internal successors, (4482), 18 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:56,499 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 249.0) internal successors, (4482), 18 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:56,499 INFO L175 Difference]: Start difference. First operand has 121 places, 443 transitions, 7101 flow. Second operand 17 states and 1657 transitions. [2023-08-30 11:16:56,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 699 transitions, 11278 flow [2023-08-30 11:16:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 699 transitions, 11277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:59,474 INFO L231 Difference]: Finished difference. Result has 143 places, 569 transitions, 10874 flow [2023-08-30 11:16:59,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10874, PETRI_PLACES=143, PETRI_TRANSITIONS=569} [2023-08-30 11:16:59,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2023-08-30 11:16:59,475 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 569 transitions, 10874 flow [2023-08-30 11:16:59,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.76923076923077) internal successors, (1128), 13 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:59,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:59,475 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1] [2023-08-30 11:16:59,491 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 11:16:59,681 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,SelfDestructingSolverStorable16 [2023-08-30 11:16:59,682 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:16:59,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1582341477, now seen corresponding path program 2 times [2023-08-30 11:16:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559217523] [2023-08-30 11:16:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:59,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559217523] [2023-08-30 11:16:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559217523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331436466] [2023-08-30 11:16:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:16:59,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:00,000 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 11:17:00,002 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 11:17:00,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:17:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:17:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:17:00,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:00,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331436466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:01,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:01,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:17:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502977094] [2023-08-30 11:17:01,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:01,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:17:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:01,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:17:01,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:17:01,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:17:01,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 569 transitions, 10874 flow. Second operand has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:01,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:01,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:17:01,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:09,022 INFO L130 PetriNetUnfolder]: 20451/33925 cut-off events. [2023-08-30 11:17:09,022 INFO L131 PetriNetUnfolder]: For 712542/712542 co-relation queries the response was YES. [2023-08-30 11:17:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199623 conditions, 33925 events. 20451/33925 cut-off events. For 712542/712542 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 285785 event pairs, 1229 based on Foata normal form. 802/34723 useless extension candidates. Maximal degree in co-relation 199560. Up to 16843 conditions per place. [2023-08-30 11:17:09,404 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 539 selfloop transitions, 412 changer transitions 0/955 dead transitions. [2023-08-30 11:17:09,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 955 transitions, 16973 flow [2023-08-30 11:17:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:17:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:17:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2747 transitions. [2023-08-30 11:17:09,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859735237245276 [2023-08-30 11:17:09,410 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2747 transitions. [2023-08-30 11:17:09,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2747 transitions. [2023-08-30 11:17:09,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:09,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2747 transitions. [2023-08-30 11:17:09,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.74074074074075) internal successors, (2747), 27 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,423 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,424 INFO L175 Difference]: Start difference. First operand has 143 places, 569 transitions, 10874 flow. Second operand 27 states and 2747 transitions. [2023-08-30 11:17:09,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 955 transitions, 16973 flow [2023-08-30 11:17:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 955 transitions, 15736 flow, removed 551 selfloop flow, removed 6 redundant places. [2023-08-30 11:17:15,956 INFO L231 Difference]: Finished difference. Result has 176 places, 747 transitions, 14869 flow [2023-08-30 11:17:15,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14869, PETRI_PLACES=176, PETRI_TRANSITIONS=747} [2023-08-30 11:17:15,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2023-08-30 11:17:15,957 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 747 transitions, 14869 flow [2023-08-30 11:17:15,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:15,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:15,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:15,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:16,166 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,SelfDestructingSolverStorable17 [2023-08-30 11:17:16,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:17:16,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1375895626, now seen corresponding path program 2 times [2023-08-30 11:17:16,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:16,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737417503] [2023-08-30 11:17:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737417503] [2023-08-30 11:17:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737417503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829880930] [2023-08-30 11:17:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:17:16,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:16,451 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 11:17:16,454 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 11:17:16,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:17:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:17:16,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:17:16,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:16,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:17,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829880930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:17,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:17,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 11:17:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233950065] [2023-08-30 11:17:17,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:17:17,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:17:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:17:17,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 11:17:17,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 747 transitions, 14869 flow. Second operand has 15 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:17,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:17,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 11:17:17,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:27,892 INFO L130 PetriNetUnfolder]: 24901/41205 cut-off events. [2023-08-30 11:17:27,892 INFO L131 PetriNetUnfolder]: For 1026238/1026238 co-relation queries the response was YES. [2023-08-30 11:17:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248652 conditions, 41205 events. 24901/41205 cut-off events. For 1026238/1026238 co-relation queries the response was YES. Maximal size of possible extension queue 2556. Compared 354685 event pairs, 1201 based on Foata normal form. 1174/42375 useless extension candidates. Maximal degree in co-relation 248576. Up to 16759 conditions per place. [2023-08-30 11:17:28,566 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 647 selfloop transitions, 683 changer transitions 0/1334 dead transitions. [2023-08-30 11:17:28,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1334 transitions, 25953 flow [2023-08-30 11:17:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:17:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:17:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3379 transitions. [2023-08-30 11:17:28,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112206401363028 [2023-08-30 11:17:28,571 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3379 transitions. [2023-08-30 11:17:28,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3379 transitions. [2023-08-30 11:17:28,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:28,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3379 transitions. [2023-08-30 11:17:28,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 102.39393939393939) internal successors, (3379), 33 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:28,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:28,585 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:28,585 INFO L175 Difference]: Start difference. First operand has 176 places, 747 transitions, 14869 flow. Second operand 33 states and 3379 transitions. [2023-08-30 11:17:28,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1334 transitions, 25953 flow [2023-08-30 11:17:38,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1334 transitions, 24205 flow, removed 866 selfloop flow, removed 4 redundant places. [2023-08-30 11:17:38,939 INFO L231 Difference]: Finished difference. Result has 221 places, 1060 transitions, 22782 flow [2023-08-30 11:17:38,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22782, PETRI_PLACES=221, PETRI_TRANSITIONS=1060} [2023-08-30 11:17:38,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2023-08-30 11:17:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 1060 transitions, 22782 flow [2023-08-30 11:17:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:38,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:38,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:38,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:39,150 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:17:39,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1477056893, now seen corresponding path program 1 times [2023-08-30 11:17:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:39,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205963835] [2023-08-30 11:17:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:39,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205963835] [2023-08-30 11:17:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205963835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49384997] [2023-08-30 11:17:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:39,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:39,541 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 11:17:39,545 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 11:17:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:17:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:39,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49384997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:42,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 11:17:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118994031] [2023-08-30 11:17:42,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:42,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:17:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:42,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:17:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:17:42,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 249 [2023-08-30 11:17:42,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 1060 transitions, 22782 flow. Second operand has 19 states, 19 states have (on average 86.52631578947368) internal successors, (1644), 19 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:42,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:42,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 249 [2023-08-30 11:17:42,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:59,202 INFO L130 PetriNetUnfolder]: 31263/51525 cut-off events. [2023-08-30 11:17:59,202 INFO L131 PetriNetUnfolder]: For 1650934/1650934 co-relation queries the response was YES. [2023-08-30 11:17:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339006 conditions, 51525 events. 31263/51525 cut-off events. For 1650934/1650934 co-relation queries the response was YES. Maximal size of possible extension queue 3119. Compared 451564 event pairs, 317 based on Foata normal form. 2072/53581 useless extension candidates. Maximal degree in co-relation 338914. Up to 13147 conditions per place. [2023-08-30 11:18:00,307 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 545 selfloop transitions, 991 changer transitions 0/1540 dead transitions. [2023-08-30 11:18:00,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1540 transitions, 33801 flow [2023-08-30 11:18:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:18:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:18:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2557 transitions. [2023-08-30 11:18:00,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39496447327772627 [2023-08-30 11:18:00,310 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2557 transitions. [2023-08-30 11:18:00,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2557 transitions. [2023-08-30 11:18:00,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:00,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2557 transitions. [2023-08-30 11:18:00,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.34615384615384) internal successors, (2557), 26 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:00,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:00,320 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:00,320 INFO L175 Difference]: Start difference. First operand has 221 places, 1060 transitions, 22782 flow. Second operand 26 states and 2557 transitions. [2023-08-30 11:18:00,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1540 transitions, 33801 flow [2023-08-30 11:18:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1540 transitions, 30447 flow, removed 1666 selfloop flow, removed 4 redundant places. [2023-08-30 11:18:21,518 INFO L231 Difference]: Finished difference. Result has 250 places, 1324 transitions, 30042 flow [2023-08-30 11:18:21,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=18720, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=30042, PETRI_PLACES=250, PETRI_TRANSITIONS=1324} [2023-08-30 11:18:21,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2023-08-30 11:18:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1324 transitions, 30042 flow [2023-08-30 11:18:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.52631578947368) internal successors, (1644), 19 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:21,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:21,524 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 11:18:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:21,721 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:18:21,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1964001879, now seen corresponding path program 1 times [2023-08-30 11:18:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865793442] [2023-08-30 11:18:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:21,902 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 11:18:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:21,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865793442] [2023-08-30 11:18:21,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865793442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:21,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009518193] [2023-08-30 11:18:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:21,905 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 11:18:21,912 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 11:18:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 11:18:21,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:22,206 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 11:18:22,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:18:23,387 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 11:18:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009518193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:18:23,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:18:23,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-30 11:18:23,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239161042] [2023-08-30 11:18:23,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:18:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:18:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:18:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:18:23,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:18:23,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1324 transitions, 30042 flow. Second operand has 15 states, 15 states have (on average 89.86666666666666) internal successors, (1348), 15 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:23,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:23,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:18:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:18:48,255 INFO L130 PetriNetUnfolder]: 41499/69255 cut-off events. [2023-08-30 11:18:48,255 INFO L131 PetriNetUnfolder]: For 2162210/2162210 co-relation queries the response was YES. [2023-08-30 11:18:49,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460192 conditions, 69255 events. 41499/69255 cut-off events. For 2162210/2162210 co-relation queries the response was YES. Maximal size of possible extension queue 4287. Compared 643123 event pairs, 3019 based on Foata normal form. 1950/71189 useless extension candidates. Maximal degree in co-relation 460092. Up to 19547 conditions per place. [2023-08-30 11:18:49,909 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1448 selfloop transitions, 758 changer transitions 0/2210 dead transitions. [2023-08-30 11:18:49,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2210 transitions, 53380 flow [2023-08-30 11:18:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:18:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:18:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1945 transitions. [2023-08-30 11:18:49,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111815683787784 [2023-08-30 11:18:49,913 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1945 transitions. [2023-08-30 11:18:49,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1945 transitions. [2023-08-30 11:18:49,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:49,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1945 transitions. [2023-08-30 11:18:49,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 102.36842105263158) internal successors, (1945), 19 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:49,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:49,921 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:49,922 INFO L175 Difference]: Start difference. First operand has 250 places, 1324 transitions, 30042 flow. Second operand 19 states and 1945 transitions. [2023-08-30 11:18:49,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2210 transitions, 53380 flow [2023-08-30 11:19:34,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 2210 transitions, 47501 flow, removed 2857 selfloop flow, removed 8 redundant places. [2023-08-30 11:19:34,789 INFO L231 Difference]: Finished difference. Result has 270 places, 1605 transitions, 36440 flow [2023-08-30 11:19:34,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=24330, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=36440, PETRI_PLACES=270, PETRI_TRANSITIONS=1605} [2023-08-30 11:19:34,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2023-08-30 11:19:34,791 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1605 transitions, 36440 flow [2023-08-30 11:19:34,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.86666666666666) internal successors, (1348), 15 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:34,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:19:34,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:19:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:19:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 11:19:34,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:19:34,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:19:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 224585094, now seen corresponding path program 1 times [2023-08-30 11:19:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:19:34,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109659192] [2023-08-30 11:19:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:19:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:19:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:19:35,273 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 11:19:35,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:19:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109659192] [2023-08-30 11:19:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109659192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:19:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638084779] [2023-08-30 11:19:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:19:35,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:19:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:19:35,276 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:19:35,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:19:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:19:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:19:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:19:35,812 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 11:19:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:19:37,806 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 11:19:37,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638084779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:19:37,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:19:37,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:19:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187126962] [2023-08-30 11:19:37,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:19:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:19:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:19:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:19:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:19:37,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:19:37,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1605 transitions, 36440 flow. Second operand has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:37,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:19:37,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:19:37,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:20:18,001 INFO L130 PetriNetUnfolder]: 56755/93209 cut-off events. [2023-08-30 11:20:18,001 INFO L131 PetriNetUnfolder]: For 3150932/3150932 co-relation queries the response was YES. [2023-08-30 11:20:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609810 conditions, 93209 events. 56755/93209 cut-off events. For 3150932/3150932 co-relation queries the response was YES. Maximal size of possible extension queue 5699. Compared 877130 event pairs, 2097 based on Foata normal form. 4112/97305 useless extension candidates. Maximal degree in co-relation 609700. Up to 29821 conditions per place. [2023-08-30 11:20:20,501 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 858 selfloop transitions, 1739 changer transitions 0/2601 dead transitions. [2023-08-30 11:20:20,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 2601 transitions, 61309 flow [2023-08-30 11:20:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 11:20:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 11:20:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3001 transitions. [2023-08-30 11:20:20,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017402945113788 [2023-08-30 11:20:20,504 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3001 transitions. [2023-08-30 11:20:20,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3001 transitions. [2023-08-30 11:20:20,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:20:20,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3001 transitions. [2023-08-30 11:20:20,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 100.03333333333333) internal successors, (3001), 30 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:20:20,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:20:20,514 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:20:20,514 INFO L175 Difference]: Start difference. First operand has 270 places, 1605 transitions, 36440 flow. Second operand 30 states and 3001 transitions. [2023-08-30 11:20:20,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 2601 transitions, 61309 flow [2023-08-30 11:21:41,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 2601 transitions, 60004 flow, removed 639 selfloop flow, removed 5 redundant places. [2023-08-30 11:21:41,684 INFO L231 Difference]: Finished difference. Result has 312 places, 2351 transitions, 60522 flow [2023-08-30 11:21:41,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=33938, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=60522, PETRI_PLACES=312, PETRI_TRANSITIONS=2351} [2023-08-30 11:21:41,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2023-08-30 11:21:41,687 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 2351 transitions, 60522 flow [2023-08-30 11:21:41,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:21:41,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:21:41,688 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:21:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 11:21:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 11:21:41,893 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:21:41,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:21:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1940308919, now seen corresponding path program 2 times [2023-08-30 11:21:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:21:41,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748233148] [2023-08-30 11:21:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:21:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:21:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:21:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:21:42,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:21:42,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748233148] [2023-08-30 11:21:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748233148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:21:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703589194] [2023-08-30 11:21:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:21:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:21:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:21:42,134 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:21:42,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 11:21:42,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:21:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:21:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:21:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:21:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:21:42,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:21:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:21:44,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703589194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:21:44,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:21:44,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 11:21:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629371395] [2023-08-30 11:21:44,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:21:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:21:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:21:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:21:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:21:44,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:21:44,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 2351 transitions, 60522 flow. Second operand has 19 states, 19 states have (on average 89.57894736842105) internal successors, (1702), 19 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:21:44,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:21:44,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:21:44,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:22:57,833 INFO L130 PetriNetUnfolder]: 72287/119703 cut-off events. [2023-08-30 11:22:57,833 INFO L131 PetriNetUnfolder]: For 5099136/5099136 co-relation queries the response was YES. [2023-08-30 11:23:00,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872125 conditions, 119703 events. 72287/119703 cut-off events. For 5099136/5099136 co-relation queries the response was YES. Maximal size of possible extension queue 6966. Compared 1173926 event pairs, 3787 based on Foata normal form. 3428/123115 useless extension candidates. Maximal degree in co-relation 871996. Up to 25569 conditions per place. [2023-08-30 11:23:01,755 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1906 selfloop transitions, 1962 changer transitions 0/3872 dead transitions. [2023-08-30 11:23:01,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 3872 transitions, 105991 flow [2023-08-30 11:23:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:23:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:23:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3408 transitions. [2023-08-30 11:23:01,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025513819985826 [2023-08-30 11:23:01,760 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3408 transitions. [2023-08-30 11:23:01,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3408 transitions. [2023-08-30 11:23:01,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:23:01,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3408 transitions. [2023-08-30 11:23:01,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.23529411764706) internal successors, (3408), 34 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:23:01,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:23:01,772 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:23:01,772 INFO L175 Difference]: Start difference. First operand has 312 places, 2351 transitions, 60522 flow. Second operand 34 states and 3408 transitions. [2023-08-30 11:23:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 3872 transitions, 105991 flow [2023-08-30 11:26:25,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 3872 transitions, 100198 flow, removed 2306 selfloop flow, removed 7 redundant places. [2023-08-30 11:26:25,901 INFO L231 Difference]: Finished difference. Result has 351 places, 3103 transitions, 86741 flow [2023-08-30 11:26:25,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=51806, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=86741, PETRI_PLACES=351, PETRI_TRANSITIONS=3103} [2023-08-30 11:26:25,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2023-08-30 11:26:25,904 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 3103 transitions, 86741 flow [2023-08-30 11:26:25,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 89.57894736842105) internal successors, (1702), 19 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:25,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:26:25,905 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:26:25,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 11:26:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:26:26,110 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 11:26:26,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:26:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1548000516, now seen corresponding path program 2 times [2023-08-30 11:26:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:26:26,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087344139] [2023-08-30 11:26:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:26:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:26:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:26:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:26:26,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:26:26,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087344139] [2023-08-30 11:26:26,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087344139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:26:26,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020834889] [2023-08-30 11:26:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:26:26,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:26:26,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:26:26,673 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:26:26,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 11:26:26,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:26:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:26:26,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:26:26,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:26:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:26:27,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:26:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:26:30,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020834889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:26:30,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:26:30,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 11:26:30,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927379259] [2023-08-30 11:26:30,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:26:30,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:26:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:26:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:26:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:26:30,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 11:26:30,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 3103 transitions, 86741 flow. Second operand has 22 states, 22 states have (on average 89.45454545454545) internal successors, (1968), 22 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:30,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:26:30,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 11:26:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:28:10,927 INFO L130 PetriNetUnfolder]: 81313/133805 cut-off events. [2023-08-30 11:28:10,927 INFO L131 PetriNetUnfolder]: For 6365702/6365702 co-relation queries the response was YES. [2023-08-30 11:28:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021664 conditions, 133805 events. 81313/133805 cut-off events. For 6365702/6365702 co-relation queries the response was YES. Maximal size of possible extension queue 7881. Compared 1312961 event pairs, 2935 based on Foata normal form. 3998/137787 useless extension candidates. Maximal degree in co-relation 1021524. Up to 39693 conditions per place. [2023-08-30 11:28:15,447 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1475 selfloop transitions, 2245 changer transitions 0/3724 dead transitions. [2023-08-30 11:28:15,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 3724 transitions, 106558 flow [2023-08-30 11:28:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:28:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:28:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3223 transitions. [2023-08-30 11:28:15,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044929718875502 [2023-08-30 11:28:15,452 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3223 transitions. [2023-08-30 11:28:15,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3223 transitions. [2023-08-30 11:28:15,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:28:15,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3223 transitions. [2023-08-30 11:28:15,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 100.71875) internal successors, (3223), 32 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:15,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:15,462 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:15,462 INFO L175 Difference]: Start difference. First operand has 351 places, 3103 transitions, 86741 flow. Second operand 32 states and 3223 transitions. [2023-08-30 11:28:15,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 3724 transitions, 106558 flow Killed by 15