./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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-three-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:44:57,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:44:57,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:44:57,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:44:57,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:44:57,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:44:57,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:44:57,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:44:57,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:44:57,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:44:57,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:44:57,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:44:57,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:44:57,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:44:57,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:44:57,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:44:57,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:44:57,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:44:57,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:44:57,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:44:57,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:44:57,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:44:57,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:44:57,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:44:57,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:44:57,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:44:57,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:44:57,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:44:57,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:44:57,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:44:57,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:44:57,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:44:57,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:44:57,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:44:57,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:44:57,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:44:57,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:44:57,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:44:57,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:44:57,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:44:57,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:44:57,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:44:57,551 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:44:57,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:44:57,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:44:57,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:44:57,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:44:57,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:44:57,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:44:57,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:44:57,553 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:44:57,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:44:57,554 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:44:57,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:44:57,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:44:57,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:44:57,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:44:57,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:44:57,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:44:57,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:44:57,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:44:57,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:44:57,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:44:57,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:44:57,558 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:44:57,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:44:57,558 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:44:57,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:44:57,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:44:57,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:44:57,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:44:57,892 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:44:57,893 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:44:57,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 14:44:59,035 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:44:59,245 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:44:59,245 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 14:44:59,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5074693d/994a4c7a605443c7861f041054a311c4/FLAG88a3edd0f [2023-09-01 14:44:59,266 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5074693d/994a4c7a605443c7861f041054a311c4 [2023-09-01 14:44:59,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:44:59,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:44:59,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:44:59,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:44:59,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:44:59,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2e2f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59, skipping insertion in model container [2023-09-01 14:44:59,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:44:59,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:44:59,453 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-three-array-sum.wvr.c[2691,2704] [2023-09-01 14:44:59,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:44:59,473 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:44:59,493 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-three-array-sum.wvr.c[2691,2704] [2023-09-01 14:44:59,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:44:59,505 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:44:59,505 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:44:59,511 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:44:59,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59 WrapperNode [2023-09-01 14:44:59,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:44:59,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:44:59,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:44:59,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:44:59,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,547 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 154 [2023-09-01 14:44:59,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:44:59,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:44:59,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:44:59,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:44:59,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,602 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:44:59,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:44:59,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:44:59,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:44:59,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (1/1) ... [2023-09-01 14:44:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:44:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:44:59,650 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) [2023-09-01 14:44:59,660 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 [2023-09-01 14:44:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:44:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:44:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:44:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:44:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:44:59,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:44:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:44:59,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:44:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:44:59,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:44:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:44:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:44:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:44:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:44:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:44:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:44:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:44:59,694 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:44:59,858 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:44:59,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:45:00,150 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:45:00,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:45:00,196 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 14:45:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:00 BoogieIcfgContainer [2023-09-01 14:45:00,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:45:00,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:45:00,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:45:00,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:45:00,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:44:59" (1/3) ... [2023-09-01 14:45:00,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efe0fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:00, skipping insertion in model container [2023-09-01 14:45:00,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:44:59" (2/3) ... [2023-09-01 14:45:00,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efe0fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:45:00, skipping insertion in model container [2023-09-01 14:45:00,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:45:00" (3/3) ... [2023-09-01 14:45:00,228 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-09-01 14:45:00,244 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:45:00,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:45:00,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:45:00,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:45:00,332 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 14:45:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 212 transitions, 448 flow [2023-09-01 14:45:00,441 INFO L130 PetriNetUnfolder]: 20/209 cut-off events. [2023-09-01 14:45:00,441 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:45:00,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 209 events. 20/209 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-09-01 14:45:00,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 212 transitions, 448 flow [2023-09-01 14:45:00,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 199 transitions, 416 flow [2023-09-01 14:45:00,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:45:00,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 199 transitions, 416 flow [2023-09-01 14:45:00,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 199 transitions, 416 flow [2023-09-01 14:45:00,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 199 transitions, 416 flow [2023-09-01 14:45:00,531 INFO L130 PetriNetUnfolder]: 20/199 cut-off events. [2023-09-01 14:45:00,531 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:45:00,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 20/199 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-09-01 14:45:00,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 1874 [2023-09-01 14:45:06,139 INFO L134 LiptonReduction]: Checked pairs total: 2518 [2023-09-01 14:45:06,139 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-09-01 14:45:06,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:45:06,157 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;@5e321a6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:45:06,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 14:45:06,163 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-09-01 14:45:06,164 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:45:06,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:06,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:06,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1140031693, now seen corresponding path program 1 times [2023-09-01 14:45:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500444817] [2023-09-01 14:45:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:06,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:45:06,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500444817] [2023-09-01 14:45:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500444817] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:45:06,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:45:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:45:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624791017] [2023-09-01 14:45:06,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:06,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:45:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:07,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:45:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:45:07,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 416 [2023-09-01 14:45:07,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:07,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 416 [2023-09-01 14:45:07,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:07,241 INFO L130 PetriNetUnfolder]: 727/977 cut-off events. [2023-09-01 14:45:07,241 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 14:45:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 977 events. 727/977 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3462 event pairs, 114 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 1483. Up to 666 conditions per place. [2023-09-01 14:45:07,264 INFO L137 encePairwiseOnDemand]: 412/416 looper letters, 42 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-09-01 14:45:07,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 223 flow [2023-09-01 14:45:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:45:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:45:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-09-01 14:45:07,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484775641025641 [2023-09-01 14:45:07,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-09-01 14:45:07,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-09-01 14:45:07,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:07,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-09-01 14:45:07,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,299 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 605 transitions. [2023-09-01 14:45:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 223 flow [2023-09-01 14:45:07,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 14:45:07,305 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 87 flow [2023-09-01 14:45:07,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-09-01 14:45:07,309 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-09-01 14:45:07,310 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 87 flow [2023-09-01 14:45:07,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:07,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:45:07,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:07,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -422331535, now seen corresponding path program 1 times [2023-09-01 14:45:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935122130] [2023-09-01 14:45:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:45:07,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935122130] [2023-09-01 14:45:07,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935122130] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:45:07,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:45:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:45:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48653295] [2023-09-01 14:45:07,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:07,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:45:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:45:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:45:07,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 416 [2023-09-01 14:45:07,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:07,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 416 [2023-09-01 14:45:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:07,787 INFO L130 PetriNetUnfolder]: 1303/1799 cut-off events. [2023-09-01 14:45:07,788 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-09-01 14:45:07,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1799 events. 1303/1799 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7215 event pairs, 578 based on Foata normal form. 50/1233 useless extension candidates. Maximal degree in co-relation 1767. Up to 1008 conditions per place. [2023-09-01 14:45:07,796 INFO L137 encePairwiseOnDemand]: 407/416 looper letters, 64 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2023-09-01 14:45:07,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 76 transitions, 341 flow [2023-09-01 14:45:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:45:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:45:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 906 transitions. [2023-09-01 14:45:07,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355769230769231 [2023-09-01 14:45:07,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 906 transitions. [2023-09-01 14:45:07,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 906 transitions. [2023-09-01 14:45:07,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:07,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 906 transitions. [2023-09-01 14:45:07,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,807 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,807 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 87 flow. Second operand 5 states and 906 transitions. [2023-09-01 14:45:07,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 76 transitions, 341 flow [2023-09-01 14:45:07,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:45:07,810 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 150 flow [2023-09-01 14:45:07,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-09-01 14:45:07,811 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-09-01 14:45:07,811 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 150 flow [2023-09-01 14:45:07,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:07,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:07,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:07,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:45:07,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:07,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1087856233, now seen corresponding path program 1 times [2023-09-01 14:45:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:07,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343601276] [2023-09-01 14:45:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:45:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343601276] [2023-09-01 14:45:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343601276] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:45:07,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:45:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:45:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999373496] [2023-09-01 14:45:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:07,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:45:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:45:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:45:08,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 416 [2023-09-01 14:45:08,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:08,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 416 [2023-09-01 14:45:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:08,237 INFO L130 PetriNetUnfolder]: 800/1134 cut-off events. [2023-09-01 14:45:08,238 INFO L131 PetriNetUnfolder]: For 285/308 co-relation queries the response was YES. [2023-09-01 14:45:08,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2540 conditions, 1134 events. 800/1134 cut-off events. For 285/308 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4438 event pairs, 380 based on Foata normal form. 23/865 useless extension candidates. Maximal degree in co-relation 2053. Up to 911 conditions per place. [2023-09-01 14:45:08,244 INFO L137 encePairwiseOnDemand]: 406/416 looper letters, 28 selfloop transitions, 6 changer transitions 32/68 dead transitions. [2023-09-01 14:45:08,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 348 flow [2023-09-01 14:45:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:45:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:45:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2023-09-01 14:45:08,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2023-09-01 14:45:08,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2023-09-01 14:45:08,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2023-09-01 14:45:08,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2023-09-01 14:45:08,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,255 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 150 flow. Second operand 5 states and 900 transitions. [2023-09-01 14:45:08,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 348 flow [2023-09-01 14:45:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 346 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 14:45:08,259 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 138 flow [2023-09-01 14:45:08,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-09-01 14:45:08,261 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 9 predicate places. [2023-09-01 14:45:08,263 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 138 flow [2023-09-01 14:45:08,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:08,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:08,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:45:08,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:08,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1040220969, now seen corresponding path program 1 times [2023-09-01 14:45:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:08,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211684284] [2023-09-01 14:45:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:08,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:45:08,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211684284] [2023-09-01 14:45:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211684284] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587224067] [2023-09-01 14:45:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:45:08,417 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) [2023-09-01 14:45:08,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:45:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:45:08,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:45:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:45:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:45:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:45:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587224067] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:45:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 14:45:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104955039] [2023-09-01 14:45:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:45:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:45:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:45:08,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-09-01 14:45:08,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:08,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:08,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-09-01 14:45:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:08,992 INFO L130 PetriNetUnfolder]: 855/1180 cut-off events. [2023-09-01 14:45:08,992 INFO L131 PetriNetUnfolder]: For 325/325 co-relation queries the response was YES. [2023-09-01 14:45:08,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2865 conditions, 1180 events. 855/1180 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4450 event pairs, 332 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 2821. Up to 884 conditions per place. [2023-09-01 14:45:09,018 INFO L137 encePairwiseOnDemand]: 411/416 looper letters, 45 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-09-01 14:45:09,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 282 flow [2023-09-01 14:45:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:45:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:45:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 874 transitions. [2023-09-01 14:45:09,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201923076923077 [2023-09-01 14:45:09,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 874 transitions. [2023-09-01 14:45:09,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 874 transitions. [2023-09-01 14:45:09,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:09,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 874 transitions. [2023-09-01 14:45:09,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,029 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,029 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 138 flow. Second operand 5 states and 874 transitions. [2023-09-01 14:45:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 282 flow [2023-09-01 14:45:09,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 248 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-09-01 14:45:09,033 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 126 flow [2023-09-01 14:45:09,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-09-01 14:45:09,035 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-09-01 14:45:09,035 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 126 flow [2023-09-01 14:45:09,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:09,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:09,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:45:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:09,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:09,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -340615580, now seen corresponding path program 1 times [2023-09-01 14:45:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:09,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718376015] [2023-09-01 14:45:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:45:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718376015] [2023-09-01 14:45:09,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718376015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882030768] [2023-09-01 14:45:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:45:09,407 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) [2023-09-01 14:45:09,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:45:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:45:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:45:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:45:09,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:45:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:45:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882030768] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:09,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:45:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 14:45:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485361547] [2023-09-01 14:45:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:45:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:45:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:45:09,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-09-01 14:45:09,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:09,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-09-01 14:45:09,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:09,856 INFO L130 PetriNetUnfolder]: 669/936 cut-off events. [2023-09-01 14:45:09,856 INFO L131 PetriNetUnfolder]: For 241/314 co-relation queries the response was YES. [2023-09-01 14:45:09,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 936 events. 669/936 cut-off events. For 241/314 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3248 event pairs, 194 based on Foata normal form. 73/812 useless extension candidates. Maximal degree in co-relation 2317. Up to 469 conditions per place. [2023-09-01 14:45:09,862 INFO L137 encePairwiseOnDemand]: 409/416 looper letters, 42 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-09-01 14:45:09,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 265 flow [2023-09-01 14:45:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:45:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:45:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-09-01 14:45:09,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41971153846153847 [2023-09-01 14:45:09,865 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-09-01 14:45:09,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-09-01 14:45:09,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:09,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-09-01 14:45:09,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,871 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,871 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 126 flow. Second operand 5 states and 873 transitions. [2023-09-01 14:45:09,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 265 flow [2023-09-01 14:45:09,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 252 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 14:45:09,873 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 151 flow [2023-09-01 14:45:09,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-09-01 14:45:09,874 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-09-01 14:45:09,874 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 151 flow [2023-09-01 14:45:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:09,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:09,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:45:10,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:10,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:10,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash -155772382, now seen corresponding path program 1 times [2023-09-01 14:45:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534213523] [2023-09-01 14:45:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:10,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:45:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534213523] [2023-09-01 14:45:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534213523] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453135366] [2023-09-01 14:45:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:10,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:10,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:45:10,188 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) [2023-09-01 14:45:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:45:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:45:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:45:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:45:10,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:45:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:45:10,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453135366] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:10,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:45:10,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 14:45:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250452547] [2023-09-01 14:45:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:45:10,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:45:10,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:45:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:45:10,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-09-01 14:45:10,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:10,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:10,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-09-01 14:45:10,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:10,584 INFO L130 PetriNetUnfolder]: 685/950 cut-off events. [2023-09-01 14:45:10,584 INFO L131 PetriNetUnfolder]: For 498/627 co-relation queries the response was YES. [2023-09-01 14:45:10,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 950 events. 685/950 cut-off events. For 498/627 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3302 event pairs, 206 based on Foata normal form. 179/924 useless extension candidates. Maximal degree in co-relation 2651. Up to 559 conditions per place. [2023-09-01 14:45:10,591 INFO L137 encePairwiseOnDemand]: 410/416 looper letters, 48 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-09-01 14:45:10,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 323 flow [2023-09-01 14:45:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:45:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:45:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-09-01 14:45:10,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41971153846153847 [2023-09-01 14:45:10,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-09-01 14:45:10,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-09-01 14:45:10,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:10,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-09-01 14:45:10,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:10,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:10,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:10,600 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 151 flow. Second operand 5 states and 873 transitions. [2023-09-01 14:45:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 323 flow [2023-09-01 14:45:10,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 311 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 14:45:10,603 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 168 flow [2023-09-01 14:45:10,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-09-01 14:45:10,603 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-09-01 14:45:10,604 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 168 flow [2023-09-01 14:45:10,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:10,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:10,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:45:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:10,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:45:10,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash -166136936, now seen corresponding path program 1 times [2023-09-01 14:45:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:10,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689091967] [2023-09-01 14:45:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:45:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689091967] [2023-09-01 14:45:12,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689091967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556234473] [2023-09-01 14:45:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:45:12,593 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) [2023-09-01 14:45:12,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:45:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 14:45:12,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:45:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:45:12,815 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 14:45:12,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 14:45:12,932 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 14:45:12,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 14:45:13,087 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-09-01 14:45:13,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 14:45:13,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-09-01 14:45:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:45:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:45:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:45:13,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-09-01 14:45:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-09-01 14:45:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:45:14,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:45:14,300 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_332 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332))) (= (mod (+ (select (select .cse0 c_~C~0.base) c_~C~0.offset) c_~csum~0) 4294967296) (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) 4294967296)))) is different from false [2023-09-01 14:45:14,367 INFO L321 Elim1Store]: treesize reduction 42, result has 62.5 percent of original size [2023-09-01 14:45:14,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 104 [2023-09-01 14:45:14,629 INFO L321 Elim1Store]: treesize reduction 11, result has 93.9 percent of original size [2023-09-01 14:45:14,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 321 treesize of output 410 [2023-09-01 14:45:14,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:45:14,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 198 treesize of output 198 [2023-09-01 14:48:38,339 WARN L222 SmtUtils]: Spent 15.39s on a formula simplification. DAG size of input: 151 DAG size of output: 32 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:48:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:48:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556234473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:48:39,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:48:39,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-09-01 14:48:39,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025696134] [2023-09-01 14:48:39,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:48:39,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 14:48:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 14:48:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1112, Unknown=2, NotChecked=68, Total=1332 [2023-09-01 14:48:39,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 416 [2023-09-01 14:48:39,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 168 flow. Second operand has 37 states, 37 states have (on average 127.16216216216216) internal successors, (4705), 37 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:39,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:39,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 416 [2023-09-01 14:48:39,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:41,510 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2023-09-01 14:48:41,511 INFO L131 PetriNetUnfolder]: For 1467/1467 co-relation queries the response was YES. [2023-09-01 14:48:41,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 1618 events. 1172/1618 cut-off events. For 1467/1467 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5221 event pairs, 179 based on Foata normal form. 1/1322 useless extension candidates. Maximal degree in co-relation 5000. Up to 1095 conditions per place. [2023-09-01 14:48:41,520 INFO L137 encePairwiseOnDemand]: 404/416 looper letters, 92 selfloop transitions, 26 changer transitions 1/119 dead transitions. [2023-09-01 14:48:41,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 119 transitions, 729 flow [2023-09-01 14:48:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:48:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:48:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1734 transitions. [2023-09-01 14:48:41,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3206360946745562 [2023-09-01 14:48:41,525 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1734 transitions. [2023-09-01 14:48:41,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1734 transitions. [2023-09-01 14:48:41,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:41,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1734 transitions. [2023-09-01 14:48:41,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.3846153846154) internal successors, (1734), 13 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:41,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 416.0) internal successors, (5824), 14 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:41,538 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 416.0) internal successors, (5824), 14 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:41,538 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 168 flow. Second operand 13 states and 1734 transitions. [2023-09-01 14:48:41,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 119 transitions, 729 flow [2023-09-01 14:48:41,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 716 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 14:48:41,542 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 367 flow [2023-09-01 14:48:41,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=367, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-09-01 14:48:41,543 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2023-09-01 14:48:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 367 flow [2023-09-01 14:48:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 127.16216216216216) internal successors, (4705), 37 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:41,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:41,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:41,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:48:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:41,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:48:41,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2070806332, now seen corresponding path program 2 times [2023-09-01 14:48:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:41,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800440215] [2023-09-01 14:48:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:48:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800440215] [2023-09-01 14:48:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800440215] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:48:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:48:41,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:48:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817644706] [2023-09-01 14:48:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:48:41,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:48:41,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:48:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:48:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:48:41,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 416 [2023-09-01 14:48:41,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:41,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:48:41,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 416 [2023-09-01 14:48:41,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:42,210 INFO L130 PetriNetUnfolder]: 1002/1400 cut-off events. [2023-09-01 14:48:42,210 INFO L131 PetriNetUnfolder]: For 2756/2928 co-relation queries the response was YES. [2023-09-01 14:48:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1400 events. 1002/1400 cut-off events. For 2756/2928 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4806 event pairs, 131 based on Foata normal form. 202/1426 useless extension candidates. Maximal degree in co-relation 4973. Up to 795 conditions per place. [2023-09-01 14:48:42,217 INFO L137 encePairwiseOnDemand]: 410/416 looper letters, 94 selfloop transitions, 12 changer transitions 2/112 dead transitions. [2023-09-01 14:48:42,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 840 flow [2023-09-01 14:48:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:48:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:48:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1181 transitions. [2023-09-01 14:48:42,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47315705128205127 [2023-09-01 14:48:42,221 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1181 transitions. [2023-09-01 14:48:42,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1181 transitions. [2023-09-01 14:48:42,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:42,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1181 transitions. [2023-09-01 14:48:42,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.83333333333334) internal successors, (1181), 6 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:42,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:42,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:42,228 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 367 flow. Second operand 6 states and 1181 transitions. [2023-09-01 14:48:42,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 840 flow [2023-09-01 14:48:42,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 808 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 14:48:42,234 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 427 flow [2023-09-01 14:48:42,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-09-01 14:48:42,235 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2023-09-01 14:48:42,235 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 427 flow [2023-09-01 14:48:42,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:42,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:48:42,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:48:42,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:48:42,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:48:42,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:48:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1174297838, now seen corresponding path program 3 times [2023-09-01 14:48:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:48:42,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612430496] [2023-09-01 14:48:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:48:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:48:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:48:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:48:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:48:43,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612430496] [2023-09-01 14:48:43,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612430496] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:48:43,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35356992] [2023-09-01 14:48:43,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:48:43,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:48:43,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:48:43,562 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) [2023-09-01 14:48:43,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:48:43,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:48:43,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:48:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 14:48:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:48:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:48:44,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:48:44,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:48:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:48:44,130 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:48:44,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-09-01 14:48:44,332 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2023-09-01 14:48:44,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2023-09-01 14:48:44,833 INFO L321 Elim1Store]: treesize reduction 60, result has 68.3 percent of original size [2023-09-01 14:48:44,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 193 [2023-09-01 14:48:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:48:45,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:48:47,306 WARN L839 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~C~0.base Int)) (let ((.cse0 (select (let ((.cse1 (* c_thread2Thread1of1ForFork2_~i~1 4))) (store (select |c_#memory_int| ~C~0.base) (+ ~C~0.offset .cse1) (+ (select (select |c_#memory_int| c_~B~0.base) (+ c_~B~0.offset .cse1)) (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1))))) (+ (* c_thread3Thread1of1ForFork0_~i~2 4) ~C~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (* 4294967296 (div (+ .cse0 c_~csum~0) 4294967296))) (+ .cse0 (* 4294967296 (div (+ c_~asum~0 c_~bsum~0) 4294967296)) c_~csum~0)))) is different from false [2023-09-01 14:49:03,489 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_430 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (* (div (+ .cse0 .cse1 c_~csum~0) 4294967296) 4294967296)) (+ .cse0 (* 4294967296 (div (+ c_~asum~0 c_~bsum~0) 4294967296)) .cse1 c_~csum~0))))) is different from false [2023-09-01 14:49:03,497 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_430 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430))) (let ((.cse0 (select (select |c_#memory_int| c_~B~0.base) (+ (* c_thread1Thread1of1ForFork1_~i~0 4) c_~B~0.offset))) (.cse1 (select (select .cse3 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (= (+ .cse0 c_~asum~0 c_~bsum~0 (* (div (+ .cse1 .cse2 c_~csum~0) 4294967296) 4294967296)) (+ (* (div (+ .cse0 c_~asum~0 c_~bsum~0) 4294967296) 4294967296) .cse1 .cse2 c_~csum~0))))) is different from false [2023-09-01 14:49:03,511 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_430 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_429))) (let ((.cse4 (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430))) (let ((.cse1 (select (select .cse4 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse0 (select (select .cse3 c_~B~0.base) (+ (* c_thread1Thread1of1ForFork1_~i~0 4) c_~B~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 .cse0 (* (div (+ .cse1 c_~csum~0 .cse2) 4294967296) 4294967296)) (+ .cse1 c_~csum~0 .cse2 (* (div (+ c_~asum~0 c_~bsum~0 .cse0) 4294967296) 4294967296))))))) is different from false [2023-09-01 14:49:03,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:49:03,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4918 treesize of output 3194 [2023-09-01 14:49:03,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:49:03,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 774 treesize of output 718 [2023-09-01 14:49:03,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:49:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 710 treesize of output 610 [2023-09-01 14:51:04,046 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:53:09,113 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:53:09,150 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:56:02,283 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:57:52,268 WARN L222 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 284 DAG size of output: 284 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15