./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 11:45:26,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:45:26,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:45:26,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:45:26,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:45:26,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:45:26,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:45:26,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:45:26,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:45:26,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:45:26,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:45:26,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:45:26,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:45:26,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:45:26,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:45:26,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:45:26,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:45:26,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:45:26,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:45:26,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:45:26,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:45:26,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:45:26,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:45:26,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:45:26,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:45:26,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:45:26,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:45:26,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:45:26,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:45:26,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:45:26,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:45:26,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:45:26,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:45:26,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:45:26,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:45:26,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:45:26,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:45:26,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:45:26,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:45:26,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:45:26,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:45:26,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:45:26,606 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:45:26,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:45:26,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:45:26,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:45:26,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:45:26,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:45:26,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:45:26,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:45:26,609 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:45:26,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:45:26,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:45:26,611 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:45:26,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:45:26,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:45:26,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:45:26,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:45:26,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:45:26,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:45:26,612 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:45:26,612 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:45:26,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:45:26,613 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:45:26,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:45:26,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:45:26,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:45:26,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:45:26,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:45:26,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:45:26,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:45:26,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:45:26,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:45:26,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:45:26,615 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:45:26,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:45:26,615 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:45:26,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:45:26,616 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:45:26,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:45:26,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:45:26,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:45:26,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:45:26,971 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:45:26,971 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:45:26,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 11:45:28,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:45:28,498 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:45:28,499 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-08-30 11:45:28,505 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0f4e5e2/3538cd19de784dfb90638b72a58d3c09/FLAG3db6eafee [2023-08-30 11:45:28,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0f4e5e2/3538cd19de784dfb90638b72a58d3c09 [2023-08-30 11:45:28,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:45:28,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:45:28,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:45:28,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:45:28,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:45:28,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2967a188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28, skipping insertion in model container [2023-08-30 11:45:28,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:45:28,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:45:28,780 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2023-08-30 11:45:28,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:45:28,808 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:45:28,850 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2023-08-30 11:45:28,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:45:28,862 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:45:28,863 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:45:28,868 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:45:28,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28 WrapperNode [2023-08-30 11:45:28,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:45:28,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:45:28,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:45:28,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:45:28,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,919 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 406 [2023-08-30 11:45:28,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:45:28,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:45:28,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:45:28,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:45:28,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,954 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:45:28,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:45:28,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:45:28,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:45:28,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (1/1) ... [2023-08-30 11:45:28,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:45:28,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:45:29,002 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 11:45:29,017 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 11:45:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:45:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:45:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:45:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:45:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:45:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:45:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:45:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:45:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:45:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:45:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 11:45:29,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 11:45:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:45:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:45:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:45:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:45:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:45:29,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:45:29,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:45:29,036 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 11:45:29,135 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:45:29,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:45:29,750 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:45:30,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:45:30,196 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 11:45:30,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:45:30 BoogieIcfgContainer [2023-08-30 11:45:30,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:45:30,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:45:30,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:45:30,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:45:30,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:45:28" (1/3) ... [2023-08-30 11:45:30,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207e0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:45:30, skipping insertion in model container [2023-08-30 11:45:30,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:45:28" (2/3) ... [2023-08-30 11:45:30,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207e0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:45:30, skipping insertion in model container [2023-08-30 11:45:30,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:45:30" (3/3) ... [2023-08-30 11:45:30,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-08-30 11:45:30,218 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:45:30,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:45:30,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 11:45:30,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:45:30,437 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 11:45:30,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 289 transitions, 610 flow [2023-08-30 11:45:30,689 INFO L130 PetriNetUnfolder]: 22/285 cut-off events. [2023-08-30 11:45:30,690 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 11:45:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 285 events. 22/285 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 328 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 242. Up to 2 conditions per place. [2023-08-30 11:45:30,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 289 transitions, 610 flow [2023-08-30 11:45:30,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 265 transitions, 551 flow [2023-08-30 11:45:30,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:45:30,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 265 transitions, 551 flow [2023-08-30 11:45:30,729 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 265 transitions, 551 flow [2023-08-30 11:45:30,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 265 transitions, 551 flow [2023-08-30 11:45:30,866 INFO L130 PetriNetUnfolder]: 21/265 cut-off events. [2023-08-30 11:45:30,867 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:45:30,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 265 events. 21/265 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 329 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 242. Up to 2 conditions per place. [2023-08-30 11:45:30,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2023-08-30 11:45:46,068 INFO L134 LiptonReduction]: Checked pairs total: 9464 [2023-08-30 11:45:46,068 INFO L136 LiptonReduction]: Total number of compositions: 275 [2023-08-30 11:45:46,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:45:46,085 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;@7b6b67c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:45:46,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-08-30 11:45:46,088 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:45:46,088 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:45:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:45:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:45:46,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:45:46,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:45:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 49022, now seen corresponding path program 1 times [2023-08-30 11:45:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:45:46,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316250533] [2023-08-30 11:45:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:45:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:45:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:45:46,438 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 11:45:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:45:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316250533] [2023-08-30 11:45:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316250533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:45:46,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:45:46,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:45:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897467794] [2023-08-30 11:45:46,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:45:46,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:45:46,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:45:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:45:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:45:46,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 564 [2023-08-30 11:45:46,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:46,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:45:46,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 564 [2023-08-30 11:45:46,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:45:54,996 INFO L130 PetriNetUnfolder]: 59431/74557 cut-off events. [2023-08-30 11:45:54,996 INFO L131 PetriNetUnfolder]: For 1060/1060 co-relation queries the response was YES. [2023-08-30 11:45:55,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150200 conditions, 74557 events. 59431/74557 cut-off events. For 1060/1060 co-relation queries the response was YES. Maximal size of possible extension queue 5834. Compared 433565 event pairs, 40496 based on Foata normal form. 0/25670 useless extension candidates. Maximal degree in co-relation 66046. Up to 36533 conditions per place. [2023-08-30 11:45:55,530 INFO L137 encePairwiseOnDemand]: 541/564 looper letters, 91 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-08-30 11:45:55,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 442 flow [2023-08-30 11:45:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:45:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:45:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-30 11:45:55,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710401891252955 [2023-08-30 11:45:55,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-30 11:45:55,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-30 11:45:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:45:55,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-30 11:45:55,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:55,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:55,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:55,572 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 159 flow. Second operand 3 states and 797 transitions. [2023-08-30 11:45:55,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 442 flow [2023-08-30 11:45:55,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 416 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 11:45:55,740 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 180 flow [2023-08-30 11:45:55,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-08-30 11:45:55,748 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -14 predicate places. [2023-08-30 11:45:55,749 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 180 flow [2023-08-30 11:45:55,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:55,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:45:55,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:45:55,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:45:55,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:45:55,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:45:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1521801, now seen corresponding path program 1 times [2023-08-30 11:45:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:45:55,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961056336] [2023-08-30 11:45:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:45:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:45:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:45:55,864 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 11:45:55,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:45:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961056336] [2023-08-30 11:45:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961056336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:45:55,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998334122] [2023-08-30 11:45:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:45:55,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:45:55,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:45:55,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:45:55,879 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 11:45:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:45:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:45:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:45:56,055 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 11:45:56,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:45:56,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998334122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:45:56,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:45:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 11:45:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351244286] [2023-08-30 11:45:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:45:56,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:45:56,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:45:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:45:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:45:56,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 564 [2023-08-30 11:45:56,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:45:56,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:45:56,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 564 [2023-08-30 11:45:56,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:46:03,011 INFO L130 PetriNetUnfolder]: 59431/74554 cut-off events. [2023-08-30 11:46:03,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:46:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149074 conditions, 74554 events. 59431/74554 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6339. Compared 435757 event pairs, 40496 based on Foata normal form. 0/25676 useless extension candidates. Maximal degree in co-relation 74517. Up to 36529 conditions per place. [2023-08-30 11:46:03,483 INFO L137 encePairwiseOnDemand]: 555/564 looper letters, 88 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-08-30 11:46:03,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 444 flow [2023-08-30 11:46:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:46:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:46:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 993 transitions. [2023-08-30 11:46:03,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401595744680851 [2023-08-30 11:46:03,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 993 transitions. [2023-08-30 11:46:03,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 993 transitions. [2023-08-30 11:46:03,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:46:03,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 993 transitions. [2023-08-30 11:46:03,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.25) internal successors, (993), 4 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:03,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 564.0) internal successors, (2820), 5 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:03,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 564.0) internal successors, (2820), 5 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:03,495 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 180 flow. Second operand 4 states and 993 transitions. [2023-08-30 11:46:03,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 444 flow [2023-08-30 11:46:03,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 432 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:46:03,499 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 168 flow [2023-08-30 11:46:03,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-08-30 11:46:03,500 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -16 predicate places. [2023-08-30 11:46:03,500 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 168 flow [2023-08-30 11:46:03,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:03,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:46:03,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:46:03,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 11:46:03,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:46:03,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:46:03,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:46:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1521802, now seen corresponding path program 1 times [2023-08-30 11:46:03,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:46:03,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294733979] [2023-08-30 11:46:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:46:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:46:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:46:03,797 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 11:46:03,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:46:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294733979] [2023-08-30 11:46:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294733979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:46:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463465021] [2023-08-30 11:46:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:46:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:46:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:46:03,803 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 11:46:03,817 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 11:46:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:46:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:46:03,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:46:03,948 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 11:46:03,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:46:03,963 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 11:46:03,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463465021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:46:03,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:46:03,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:46:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502169516] [2023-08-30 11:46:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:46:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:46:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:46:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:46:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:46:04,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 564 [2023-08-30 11:46:04,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 225.14285714285714) internal successors, (1576), 7 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:04,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:46:04,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 564 [2023-08-30 11:46:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:46:20,624 INFO L130 PetriNetUnfolder]: 148576/186379 cut-off events. [2023-08-30 11:46:20,624 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:46:20,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372658 conditions, 186379 events. 148576/186379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11072. Compared 1162916 event pairs, 101240 based on Foata normal form. 0/64703 useless extension candidates. Maximal degree in co-relation 298059. Up to 36531 conditions per place. [2023-08-30 11:46:21,520 INFO L137 encePairwiseOnDemand]: 555/564 looper letters, 208 selfloop transitions, 21 changer transitions 0/235 dead transitions. [2023-08-30 11:46:21,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 235 transitions, 1050 flow [2023-08-30 11:46:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:46:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:46:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1582 transitions. [2023-08-30 11:46:21,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46749408983451535 [2023-08-30 11:46:21,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1582 transitions. [2023-08-30 11:46:21,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1582 transitions. [2023-08-30 11:46:21,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:46:21,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1582 transitions. [2023-08-30 11:46:21,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 263.6666666666667) internal successors, (1582), 6 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:21,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 564.0) internal successors, (3948), 7 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:21,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 564.0) internal successors, (3948), 7 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:21,536 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 168 flow. Second operand 6 states and 1582 transitions. [2023-08-30 11:46:21,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 235 transitions, 1050 flow [2023-08-30 11:46:21,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 235 transitions, 1037 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:46:21,546 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 317 flow [2023-08-30 11:46:21,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2023-08-30 11:46:21,547 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -10 predicate places. [2023-08-30 11:46:21,547 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 317 flow [2023-08-30 11:46:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 225.14285714285714) internal successors, (1576), 7 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:21,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:46:21,548 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:46:21,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 11:46:21,754 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,SelfDestructingSolverStorable2 [2023-08-30 11:46:21,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:46:21,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:46:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1906562497, now seen corresponding path program 2 times [2023-08-30 11:46:21,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:46:21,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152572371] [2023-08-30 11:46:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:46:21,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:46:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:46:21,862 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 11:46:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:46:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152572371] [2023-08-30 11:46:21,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152572371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:46:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582690230] [2023-08-30 11:46:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:46:21,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:46:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:46:21,865 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 11:46:21,866 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 11:46:21,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:46:21,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:46:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:46:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:46:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:46:22,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:46:22,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582690230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:46:22,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:46:22,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:46:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209764756] [2023-08-30 11:46:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:46:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:46:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:46:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:46:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:46:22,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 564 [2023-08-30 11:46:22,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:22,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:46:22,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 564 [2023-08-30 11:46:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:46:38,396 INFO L130 PetriNetUnfolder]: 148576/186378 cut-off events. [2023-08-30 11:46:38,396 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 11:46:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372694 conditions, 186378 events. 148576/186378 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13132. Compared 1176208 event pairs, 101240 based on Foata normal form. 1/63334 useless extension candidates. Maximal degree in co-relation 298069. Up to 182623 conditions per place. [2023-08-30 11:46:39,570 INFO L137 encePairwiseOnDemand]: 561/564 looper letters, 62 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2023-08-30 11:46:39,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 443 flow [2023-08-30 11:46:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:46:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:46:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-30 11:46:39,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314420803782506 [2023-08-30 11:46:39,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-30 11:46:39,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-30 11:46:39,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:46:39,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-30 11:46:39,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:39,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:39,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:39,579 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 317 flow. Second operand 3 states and 730 transitions. [2023-08-30 11:46:39,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 443 flow [2023-08-30 11:46:39,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 413 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 11:46:39,582 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 289 flow [2023-08-30 11:46:39,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-30 11:46:39,583 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -10 predicate places. [2023-08-30 11:46:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 289 flow [2023-08-30 11:46:39,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:39,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:46:39,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 11:46:39,592 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 11:46:39,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:46:39,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:46:39,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:46:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1383971233, now seen corresponding path program 1 times [2023-08-30 11:46:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:46:39,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476538045] [2023-08-30 11:46:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:46:39,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:46:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:46:39,896 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 11:46:39,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:46:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476538045] [2023-08-30 11:46:39,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476538045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:46:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77557983] [2023-08-30 11:46:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:46:39,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:46:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:46:39,903 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 11:46:39,905 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 11:46:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:46:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:46:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:46:40,065 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 11:46:40,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:46:40,111 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 11:46:40,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77557983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:46:40,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:46:40,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 11:46:40,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858450026] [2023-08-30 11:46:40,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:46:40,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:46:40,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:46:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:46:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:46:40,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 564 [2023-08-30 11:46:40,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 289 flow. Second operand has 13 states, 13 states have (on average 225.15384615384616) internal successors, (2927), 13 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:46:40,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:46:40,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 564 [2023-08-30 11:46:40,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:47:17,826 INFO L130 PetriNetUnfolder]: 326866/410028 cut-off events. [2023-08-30 11:47:17,826 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 11:47:18,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819863 conditions, 410028 events. 326866/410028 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 15769. Compared 2665566 event pairs, 222728 based on Foata normal form. 12/142771 useless extension candidates. Maximal degree in co-relation 819759. Up to 36543 conditions per place. [2023-08-30 11:47:20,028 INFO L137 encePairwiseOnDemand]: 556/564 looper letters, 447 selfloop transitions, 51 changer transitions 0/504 dead transitions. [2023-08-30 11:47:20,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 504 transitions, 2357 flow [2023-08-30 11:47:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:47:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:47:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3198 transitions. [2023-08-30 11:47:20,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725177304964539 [2023-08-30 11:47:20,035 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3198 transitions. [2023-08-30 11:47:20,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3198 transitions. [2023-08-30 11:47:20,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:47:20,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3198 transitions. [2023-08-30 11:47:20,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 266.5) internal successors, (3198), 12 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:47:20,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 564.0) internal successors, (7332), 13 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:47:20,053 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 564.0) internal successors, (7332), 13 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:47:20,054 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 289 flow. Second operand 12 states and 3198 transitions. [2023-08-30 11:47:20,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 504 transitions, 2357 flow [2023-08-30 11:47:20,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 504 transitions, 2333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:47:20,061 INFO L231 Difference]: Finished difference. Result has 80 places, 104 transitions, 637 flow [2023-08-30 11:47:20,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=637, PETRI_PLACES=80, PETRI_TRANSITIONS=104} [2023-08-30 11:47:20,062 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2023-08-30 11:47:20,062 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 104 transitions, 637 flow [2023-08-30 11:47:20,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 225.15384615384616) internal successors, (2927), 13 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:47:20,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:47:20,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:47:20,071 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 11:47:20,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:47:20,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:47:20,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:47:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1407402982, now seen corresponding path program 1 times [2023-08-30 11:47:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:47:20,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399485609] [2023-08-30 11:47:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:47:20,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:47:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:47:20,527 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 11:47:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:47:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399485609] [2023-08-30 11:47:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399485609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:47:20,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:47:20,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:47:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951218270] [2023-08-30 11:47:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:47:20,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:47:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:47:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:47:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:47:20,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 564 [2023-08-30 11:47:20,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 104 transitions, 637 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:47:20,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:47:20,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 564 [2023-08-30 11:47:20,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:11,746 INFO L130 PetriNetUnfolder]: 411214/526309 cut-off events. [2023-08-30 11:48:11,747 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 11:48:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059269 conditions, 526309 events. 411214/526309 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 23144. Compared 3834649 event pairs, 119944 based on Foata normal form. 0/194472 useless extension candidates. Maximal degree in co-relation 962738. Up to 326008 conditions per place. [2023-08-30 11:48:16,219 INFO L137 encePairwiseOnDemand]: 560/564 looper letters, 132 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2023-08-30 11:48:16,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 984 flow [2023-08-30 11:48:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-30 11:48:16,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46217494089834515 [2023-08-30 11:48:16,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-30 11:48:16,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-30 11:48:16,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:16,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-30 11:48:16,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:16,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:16,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:16,227 INFO L175 Difference]: Start difference. First operand has 80 places, 104 transitions, 637 flow. Second operand 3 states and 782 transitions. [2023-08-30 11:48:16,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 984 flow [2023-08-30 11:48:16,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 840 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-30 11:48:16,248 INFO L231 Difference]: Finished difference. Result has 78 places, 105 transitions, 507 flow [2023-08-30 11:48:16,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=507, PETRI_PLACES=78, PETRI_TRANSITIONS=105} [2023-08-30 11:48:16,251 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-30 11:48:16,251 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 105 transitions, 507 flow [2023-08-30 11:48:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:16,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:16,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:48:16,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-08-30 11:48:16,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -392354303, now seen corresponding path program 1 times [2023-08-30 11:48:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582389133] [2023-08-30 11:48:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.